CN110212826B - Converter system of direct-boost double-fed switched reluctance generator - Google Patents
Converter system of direct-boost double-fed switched reluctance generator Download PDFInfo
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- CN110212826B CN110212826B CN201910584035.7A CN201910584035A CN110212826B CN 110212826 B CN110212826 B CN 110212826B CN 201910584035 A CN201910584035 A CN 201910584035A CN 110212826 B CN110212826 B CN 110212826B
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- 238000004804 winding Methods 0.000 claims abstract description 212
- 239000003990 capacitor Substances 0.000 claims abstract description 136
- 230000005284 excitation Effects 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 14
- 238000010248 power generation Methods 0.000 claims description 10
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 230000002787 reinforcement Effects 0.000 abstract 1
- 230000009466 transformation Effects 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/26—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices
- H02P9/30—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices
- H02P9/305—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field using discharge tubes or semiconductor devices using semiconductor devices controlling voltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
- H02P9/14—Arrangements for controlling electric generators for the purpose of obtaining a desired output by variation of field
- H02P9/38—Self-excitation by current derived from rectification of both output voltage and output current of generator
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P2101/00—Special adaptation of control arrangements for generators
- H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
A kind of direct-boosting double-fed switch reluctance generator current transformation system, by the storage battery, main circuit, charge and present the energy circuit, two-way isolator, output capacitor to make up, the main circuit is made up of phase circuit of every phase winding, every phase circuit connects in parallel each other, the storage battery offers the excitation, every phase circuit can realize the excitation voltage raises the reinforcement excitation effect of one time while exciting, can realize the output side voltage obviously higher than the input side storage battery voltage directly, solve the problem that the excitation stage output side can not get the continuous output current in the operation of the switch reluctance generator at the same time, and there are storage batteries to participate in outputting in the excitation stage, thus the output side electric energy quality is higher; the charging and energy-feeding circuit can automatically charge the storage battery in the forward direction and can also output the electric energy of the storage battery to the load side in the reverse direction under extreme conditions, so that the adaptability of the system is improved; the method is suitable for application in medium-high speed and small-size switched reluctance generator systems under various power driving.
Description
Technical Field
The invention relates to the field of switched reluctance motor systems, in particular to a direct boosting, continuous output, automatic charging and reverse energy-feedback switched reluctance generator converter system and a control method thereof.
Background
The switched reluctance motor has simple and firm structure, strong fault tolerance and small heat dissipation pressure of no winding on the rotor, and has wide application prospect as a generator.
In most generator applications, the same applies to the general application field of the switched reluctance generator, and the switched reluctance generator is usually boosted by a special boosting device after generating electric energy so as to meet the requirement of a load side.
The switch reluctance generator is excited by using the storage battery as a separately excited power supply, but the switch reluctance generator has obvious advantages and obvious disadvantages in a conventional mode, firstly, if the storage battery cannot be charged, a large amount of labor cost is consumed, the reliability is also reduced, and secondly, only the storage battery voltage is applied to a phase winding during excitation, so that the relatively important excitation strengthening effect of the switch reluctance generator cannot be achieved.
In the working of the switched reluctance generator system, the excitation stage and the power generation stage are carried out in a time-sharing manner, which are different, and often cause that the output end has larger fluctuation and can not directly obtain more stable continuous current, because generally the output end of the power generation stage receives energy supplied by a phase winding and the like, and the excitation stage often can not output electric energy, which causes that the quality of the electric energy at the output side is low, even if a mode of connecting the output ends of a plurality of phases of windings in parallel is adopted, although the quality of the output electric energy can be improved, the problem of periodic larger pulsation still exists.
In some application fields, such as the field of wind-driven switched reluctance wind turbine generator systems, wind instability causes unstable power output, and in extreme cases, such as a large load on the load side and a weak wind force at the moment, or a sudden voltage drop due to a short-circuit fault on the load side, the switched reluctance wind turbine generator system has to be shut down in a severe case, so that the load side is broken down, and even if an excitation power supply, such as a storage battery, stores more electric energy, the field cannot be used.
Disclosure of Invention
According to the background technology, the invention provides the switched reluctance generator converter system which directly boosts voltage by depending on the switched reluctance generator converter main circuit, keeps continuous electric energy at the output side in the excitation and power generation stages, can automatically charge an excitation storage battery and reversely feeds energy as necessary and a control method thereof, and is suitable for the application in the field of medium-high speed and small-size switched reluctance generator systems under various power driving.
The technical scheme of the invention is as follows:
a converter system of a direct-voltage double-fed switch reluctance generator is characterized by comprising: the device comprises a storage battery, a main circuit, a charging and energy-feeding circuit, a bidirectional isolator and an output capacitor, wherein the positive and negative ends of the storage battery are respectively connected with the positive and negative input ends of the main circuit and also respectively connected with the positive and negative output ends of the charging and energy-feeding circuit;
the main circuit comprises a first phase circuit, a second phase circuit and a third phase circuit, wherein the first phase circuit, the second phase circuit and the third phase circuit have the same structure, the input positive and negative ends of the first phase circuit, the second phase circuit and the third phase circuit are connected in parallel, namely the input positive ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the input positive end of the main circuit, the input negative ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the input negative end of the main circuit, the output positive and negative ends of the first phase circuit, the second phase circuit and the third phase circuit are connected in parallel, namely the output positive ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the output positive end of the main circuit, and the output;
the first phase circuit comprises a first switch tube, a second switch tube, a first branch winding of a first phase winding, a second branch winding of the first phase winding, a first capacitor, a second capacitor, a first diode, a second diode and a third diode, wherein the anode of the first switch tube is connected with one end of the second branch winding of the first phase winding and is used as the input positive end of the first phase circuit, the cathode of the first switch tube is connected with one end of the first branch winding of the first phase winding, one end of the first capacitor and the cathode of the second diode, the other end of the second branch winding of the first phase winding is connected with the anode of the second switch tube, the anode of the first diode and one end of the second capacitor, the cathode of the second switch tube is connected with the other end of the first branch winding of the first phase winding and is used as the input negative end of the first phase circuit, the other end of the first capacitor is connected with the cathode of the first diode and the anode of the third diode, the anode of the second diode is connected with the other end of the second capacitor and is used as the output negative end of the first-phase circuit, and the cathode of the third diode is used as the output positive end of the first-phase circuit;
the second phase circuit comprises a third switching tube, a fourth switching tube, a second phase winding first branch winding, a second phase winding second branch winding, a third capacitor, a fourth diode, a fifth diode and a sixth diode, wherein the anode of the third switching tube is connected with one end of the second phase winding second branch winding and is used as the input positive end of the second phase circuit, the cathode of the third switching tube is connected with one end of the second phase winding first branch winding, one end of the third capacitor and the cathode of the fifth diode, the other end of the second phase winding second branch winding is connected with the anode of the fourth switching tube, the anode of the fourth diode and one end of the fourth capacitor, the cathode of the fourth switching tube is connected with the other end of the second phase winding first branch winding and is used as the input negative end of the second phase circuit, and the other end of the third capacitor is connected with the cathode of the fourth diode and the anode of the sixth diode, the anode of the fifth diode is connected with the other end of the fourth capacitor and is used as the output negative end of the second-phase circuit, and the cathode of the sixth diode is used as the output positive end of the second-phase circuit;
the third phase circuit comprises a fifth switching tube, a sixth switching tube, a third phase winding first branch winding, a third phase winding second branch winding, a fifth capacitor, a sixth capacitor, a seventh diode, an eighth diode and a ninth diode, wherein the anode of the fifth switching tube is connected with one end of the third phase winding second branch winding and is used as the input positive end of the third phase circuit, the cathode of the fifth switching tube is connected with one end of the third phase winding first branch winding, one end of the fifth capacitor and the cathode of the eighth diode, the other end of the third phase winding second branch winding is connected with the anode of the sixth switching tube, the anode of the seventh diode and one end of the sixth capacitor, the cathode of the sixth switching tube is connected with the other end of the third phase winding first branch winding and is used as the input negative end of the third phase circuit, the other end of the fifth capacitor is connected with the cathode of the seventh diode and the anode of the ninth diode, the anode of the eighth diode is connected with the other end of the sixth capacitor and serves as the output negative end of the third-phase circuit, and the cathode of the ninth diode serves as the output positive end of the third-phase circuit;
the first phase winding first branch winding and the first phase winding second branch winding form a first phase winding, the second phase winding first branch winding and the second phase winding second branch winding form a second phase winding, and the third phase winding first branch winding and the third phase winding second branch winding form a third phase winding;
the charging and energy-feeding circuit comprises a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, a twelfth pole tube, an eleventh diode, a twelfth diode, a thirteenth diode and a transformer, wherein one end of the seventh capacitor is connected with the anode of the ninth switch tube, the cathode of the twelfth diode and one end of the eleventh capacitor and is used as the input positive end of the charging and energy-feeding circuit, the other end of the seventh capacitor is connected with one end of the eighth capacitor and one end of the secondary side winding of the transformer, the other end of the eighth capacitor is connected with the cathode of the tenth switch tube, the anode of the thirteenth diode and one end of the twelfth capacitor and is used as the input negative end of the charging and energy-feeding circuit, the cathode of the ninth switch tube is connected with the anode of a twelfth diode, the other end of an eleventh capacitor, the anode of the eighth switch tube, the cathode of the eleventh diode, one end of the tenth capacitor and one end of the thirteenth capacitor, the anode of the tenth switch tube is connected with the cathode of the thirteenth diode, the other end of the twelfth capacitor, the cathode of the seventh switch tube, the anode of the twelfth diode and one end of the ninth capacitor, and is used as the output cathode end of the charging and energy-feeding circuit, the anode of the seventh switch tube is connected with the cathode of the twelfth diode, the other end of the ninth capacitor, the cathode of the eighth switch tube, the anode of the eleventh diode, the other end of the tenth capacitor, one end of the primary side winding of the transformer and the other end of the secondary side winding of the transformer, the other end of the primary side winding of the transformer is connected with the other, the windings on both sides of the transformer are reversed in polarity.
A control method of a converter system of a direct-boost double-fed switched reluctance generator is characterized in that according to the operation principle of the switched reluctance generator and rotor position information thereof, when a first phase winding needs to be put into operation, a first phase circuit is put into operation, a first switching tube and a second switching tube are closed firstly, an excitation stage is started, and after the excitation stage is finished according to the rotor position information, the first switching tube and the second switching tube are disconnected, and a power generation stage is started;
when a second-phase winding and a third-phase winding are required to be put into operation according to the position information of the rotor, the corresponding second-phase circuit and the corresponding third-phase circuit are respectively put into operation, the operation mode is completely the same as that of the first-phase circuit, and the corresponding relation of the specific switching devices is as follows: the third switching tube and the fifth switching tube correspond to the first switching tube, and the fourth switching tube and the sixth switching tube correspond to the second switching tube;
when the electric quantity of the storage battery is detected to be lower than the lower limit value, the charging and energy feedback circuit is put into operation and operates in the forward direction, the charging and energy feedback circuit outputs electric energy to charge the storage battery, and the charging and energy feedback circuit operates in the forward direction in the following steps:
the method comprises the following steps: the tenth switching tube is closed;
step two: the eighth switching tube is closed;
step three: the eighth switching tube and the tenth switching tube are disconnected;
step four: the ninth switching tube is closed;
step five: the ninth switching tube is disconnected;
the steps are carried out in a circulating mode, on the basis that the steps meet the conditions, the duty ratio of each switching tube in the steps can be adjusted according to the requirement of the storage battery, and the forward output charging voltage and current of the charging and energy feedback circuit are changed.
When the electric energy of the storage battery is higher than the lower limit value and the excessive voltage of the side load of the output capacitor is lower than the lower limit value, the charging and energy-feeding circuit reversely operates and feeds energy, the electric energy of the storage battery is reversely converted and output, and the charging and energy-feeding circuit reversely works as follows:
the method comprises the following steps: the seventh switch tube is closed;
step two: the seventh switch tube is disconnected;
step three: the eighth switching tube is closed;
step four: the eighth switching tube is disconnected;
the steps are carried out circularly, and based on the condition that the steps meet, according to the requirement of a load on the side of an output capacitor, the duty ratio of each switching tube in the steps can be adjusted, and the reverse output energy feedback voltage and current of the charging and energy feedback circuit are changed.
The invention has the following main technical effects:
(1) in the main circuit, each phase circuit performs excitation and power generation operation control on the corresponding phase winding of the switched reluctance generator, and simultaneously, the output voltage is obviously higher than the voltage of the storage battery on the input side, namely, other special booster circuits are not needed or at least subsequent boosting links are reduced, the self phase circuit can realize larger voltage boosting, the main circuit meets most requirements in the industry, and the voltage stress of each switching tube in the main circuit is not increased; in addition, one phase winding is divided into two branch windings which are connected in parallel in the excitation stage, so that the excitation voltage is doubled relatively to play a strengthening effect, and the two branch windings are connected in series in the power generation stage, so that the output voltage is favorably raised.
(2) When each phase circuit of the main circuit works, continuous current output is provided in the excitation stage and the power generation stage, and the outputs of the phase circuits are connected in parallel, so that the output electric energy quality of the main circuit is high.
(3) Although each working switch tube of the charging and energy-feeding circuit is in a high-frequency PWM mode in the working process, the charging and energy-feeding circuit can be used only under the condition that a storage battery needs to be charged or a load side terminal is needed, the total switching loss is not high, and each switch tube of the charging and energy-feeding circuit can realize soft switching operation in the working process.
Drawings
Fig. 1 is a circuit structure diagram of a converter system of a direct-voltage double-fed switched reluctance generator according to the present invention.
Detailed Description
The circuit structure of the converter system of the direct-voltage double-fed switched reluctance generator of the embodiment is shown in the attached figure 1, and the converter system is composed of a storage battery X, a main circuit 1, a charging and energy-feeding circuit 2, a bidirectional isolator 3 and an output capacitor C0, wherein the positive and negative ends of the storage battery X are respectively connected with the input positive and negative ends of the main circuit 1 and also respectively connected with the output positive and negative ends of the charging and energy-feeding circuit 2, the output positive and negative ends of the main circuit 1 are respectively connected with the positive and negative ends of an output capacitor C0 and also respectively connected with the input positive and negative ends of the bidirectional isolator 3, the output positive and negative ends of the bidirectional isolator 3 are respectively connected with the input positive and negative ends of the charging and energy-feeding circuit 2, and the positive and negative ends;
the main circuit 1 comprises a first phase circuit 101, a second phase circuit 102 and a third phase circuit 103, wherein the internal structures of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are completely the same, the two ends of the input anode and the negative pole are connected in parallel, namely, the input positive terminals of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are connected with each other to serve as the input positive terminal of the main circuit 1, the input negative terminals of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are connected with each other to serve as the input negative terminal of the main circuit 1, the output positive terminals and the output negative terminals of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are connected in parallel, the output positive terminals of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are connected with each other to serve as the output positive terminal of the main circuit 1, and the output negative terminals of the first phase circuit 101, the second phase circuit 102 and the third phase circuit 103 are connected with each other to serve as the output negative terminal of the main circuit 1;
the first phase circuit 101 comprises a first switching tube V1, a second switching tube V2, a first phase winding first branch winding M1, a first phase winding second branch winding M2, a first capacitor C1, a second capacitor C2, a first diode D1, a second diode D2 and a third diode D3, wherein the anode of the first switching tube V1 is connected with one end of the first phase winding second branch winding M2 and serves as the input positive end of the first phase circuit 101, the cathode of the first switching tube V1 is connected with one end of the first phase winding first branch winding M1, one end of the first capacitor C1 and the cathode of the second diode D2, the other end of the first phase winding second branch winding M2 is connected with the anode of the second switching tube V2, the anode of the first diode D1 and one end of the second capacitor C2, the cathode of the second switching tube V2 is connected with the other end of the first phase winding first branch winding M1 and serves as the input negative end of the first phase winding M1, and the cathode of the first diode C1 is connected with the other end of the first diode D1, The anode of the third diode D3, the anode of the second diode D2 is connected with the other end of the second capacitor C2 and is used as the output negative terminal of the first phase circuit 101, and the cathode of the third diode D3 is used as the output positive terminal of the first phase circuit 101;
the second phase circuit 102 includes a third switch tube V3, a fourth switch tube V4, a second phase winding first branch winding N1, a second phase winding second branch winding N2, a third capacitor C3, a fourth capacitor C4, a fourth diode D4, a fifth diode D5, a sixth diode D6, a third switch tube V3 having an anode connected to one end of the second phase winding second branch winding N2 and serving as an input anode of the second phase circuit 102, a third switch tube V3 having a cathode connected to one end of the second phase winding first branch winding N1, one end of the third capacitor C3, a fifth diode D5, a cathode connected to the other end of the second phase winding second branch winding N2, an anode of the fourth switch tube V4, an anode of the fourth diode D4 and one end of the fourth capacitor C4, a fourth switch tube V4 having a cathode connected to the other end of the second phase winding first branch winding N1 and serving as an input cathode of the second phase circuit 102, and the other end of the third phase winding C3 connected to the cathode of the fourth diode D4, An anode of the sixth diode D6, an anode of the fifth diode D5 connected to the other end of the fourth capacitor C4 and serving as an output negative terminal of the second phase circuit 102, and a cathode of the sixth diode D6 serving as an output positive terminal of the second phase circuit 102;
the third phase circuit 103 comprises a fifth switching tube V5, a sixth switching tube V6, a third phase winding first branch winding P1, a third phase winding second branch winding P2, a fifth capacitor C5, a sixth capacitor C6, a seventh diode D7, an eighth diode D8 and a ninth diode D9, wherein the anode of the fifth switching tube V5 is connected with one end of the third phase winding second branch winding P2 and serves as the input positive terminal of the third phase circuit 103, the cathode of the fifth switching tube V5 is connected with one end of the third phase winding first branch winding P1, one end of the fifth capacitor C5 and the cathode of the eighth diode D8, the other end of the third phase winding second branch winding P2 is connected with the anode of the sixth switching tube V6, the anode of the seventh diode D7 and one end of the sixth capacitor C6, the cathode of the sixth switching tube V6 is connected with the other end of the third phase winding first branch winding P1 and serves as the input negative terminal of the third phase circuit 103, and the other end of the seventh diode C7 is connected with the cathode of the cathode 639D 7, The anode of the ninth diode D9, the anode of the eighth diode D8 are connected with the other end of the sixth capacitor C6 and are used as the output negative terminal of the third phase circuit 103, and the cathode of the ninth diode D9 is used as the output positive terminal of the third phase circuit 103;
the first phase winding M1 and the first phase winding second branch winding M2 form a first phase winding M, the second phase winding first branch winding N1 and the second phase winding second branch winding N2 form a second phase winding N, and the third phase winding first branch winding P1 and the third phase winding second branch winding P2 form a third phase winding P; each capacitor is large enough to keep the voltage across it relatively stable;
the charging and energy-feeding circuit 2 comprises a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a seventh switch tube V7, an eighth switch tube V8, a ninth switch tube V9, a tenth switch tube V10, a twelfth diode D10, an eleventh diode D11, a twelfth diode D12, a thirteenth diode D13 and a transformer T, one end of the seventh capacitor C7 is connected with the anode of the ninth switch tube V9, the cathode of the twelfth diode D12 and one end of the eleventh capacitor C11 and serves as an input positive terminal of the charging and energy-feeding circuit 2, the other end of the seventh capacitor C7 is connected with one end of the eighth capacitor C8 and one end of a secondary winding b of the transformer T, the other end of the eighth capacitor C8 is connected with the cathode of the tenth switch tube V10, the cathode of the thirteenth diode D13 and one end of the twelfth capacitor C12 and the negative terminal of the charging and energy-feeding circuit, a cathode of a ninth switch tube V9 is connected with an anode of a twelfth diode D12, another end of an eleventh capacitor C11, an anode of an eighth switch tube V8, a cathode of an eleventh diode D11, one end of a tenth capacitor C10 and one end of a thirteenth capacitor C13, an anode of a tenth switch tube V10 is connected with a cathode of a thirteenth diode D13, another end of a twelfth capacitor C12, a cathode of a seventh switch tube V7, an anode of a twelfth polar tube D10 and one end of a ninth capacitor C9 and serves as an output negative end of the charging and energy-feeding circuit 2, an anode of a seventh switch tube V7 is connected with a cathode of a twelfth polar tube D10, another end of a ninth capacitor C9, a cathode of an eighth switch tube V8, an anode of an eleventh diode D11, another end of a tenth capacitor C10, one end of a winding a of a transformer T and another end of a secondary winding b of the transformer T, another end of a winding a is connected with another end of the thirteenth capacitor C13 and, the windings on two sides of the transformer T have opposite polarities, and the number of turns of the secondary side winding b of the transformer T divided by the number of turns of the primary side winding a of the transformer T is more than 1.
According to the control method of the converter system of the direct-boost doubly-fed switched reluctance generator in the embodiment, according to the operation principle of the switched reluctance generator and the rotor position information thereof, when a first-phase winding M is required to be put into operation, a first-phase circuit 101 is put into operation, a first switching tube V1 and a second switching tube V2 are firstly closed, an excitation stage is started, and three loops exist in the first-phase circuit 101 at the stage, wherein the three loops are respectively as follows: the circuit comprises X-V1-M1-X, X-M2-V2-X, X-V1-C1-D3-C0-C2-V2-X, wherein the first two loops are formed by connecting a storage battery X in parallel to excite a first branch winding M1 of a first phase winding and a second branch winding M2 of the first phase winding, the voltages of the two branch windings are respectively equal to the voltage of the storage battery X, and the last loop is equivalent to that the storage battery X, a first capacitor C1 and a second capacitor C2 are connected in series to output electric energy to the side of an output capacitor C0 together, namely continuous electric energy output from the input side exists in the excitation stage; after the excitation stage is finished according to the rotor position information, the first switch tube V1 and the second switch tube V2 are disconnected, and the power generation stage is started, wherein at the moment, three loops respectively: M2-D1-C1-M1-X-M2, M2-C2-D2-M1-X-M2, M2-D1-D3-C0-D2-M1-X-M2, the first loop is equivalent to the first phase winding first branch winding M1, the first phase winding second branch winding M2 and the storage battery X are connected in series to charge the first capacitor C1, the second loop is equivalent to the first phase winding first branch winding M1, the first phase winding second branch winding M2 and the storage battery X are connected in series to charge the second capacitor C2, the capacitance values of the first capacitor C1 and the second capacitor C2 are the same, the voltages are the same, the third loop is equivalent to the first phase winding first branch winding M1, the first phase winding second branch winding M2 and the storage battery X are connected in series to charge the output capacitor C0 and output electric energy to the outside, it can be seen that the voltage at the output end is far greater than the voltage at the two ends of the storage battery X at the input end;
when the second-phase winding N and the third-phase winding P are required to be put into operation according to the rotor position information, the corresponding second-phase circuit 102 and the corresponding third-phase circuit 103 are respectively put into operation, the operation mode is completely the same as that of the first-phase circuit 101, and the specific correspondence relationship is as follows: a third switching tube V3 and a fifth switching tube V5 correspond to the first switching tube V1, a fourth switching tube V4 and a sixth switching tube V6 correspond to the second switching tube V2, a second phase winding N1 and a third phase winding P1 correspond to the first phase winding M1, a second phase winding N2 and a third phase winding P2 correspond to the first phase winding M2, a third capacitor C3 and a fifth capacitor C5 correspond to the first capacitor C1, a fourth capacitor C4 and a sixth capacitor C6 correspond to the second capacitor C2, a fourth diode D4 and a seventh diode D7 correspond to the first diode D1, a fifth diode D5 and an eighth diode D8 correspond to the second diode D2, and a sixth diode D6 and a ninth diode D9 correspond to the third diode D3;
when the electric quantity of the storage battery X is detected to be lower than the lower limit value, the charging and energy-feeding circuit 2 is put into operation and operates in the forward direction, the charging and energy-feeding circuit 2 outputs electric energy to charge the storage battery X, and the charging and energy-feeding circuit 2 works in the forward direction in the following steps:
the method comprises the following steps: the tenth switching tube V10 is closed;
step two: the eighth switching tube V8 is closed;
step three: the eighth switching tube V8 and the tenth switching tube V10 are disconnected;
step four: the ninth switching tube V9 is closed;
step five: the ninth switching tube V9 is off;
the steps are carried out in a circulating mode, on the basis that the steps meet the conditions, the duty ratios of the switching tubes in the steps can be adjusted according to the requirement of the storage battery X, and then the charging voltage and the current output by the charging and energy feedback circuit 2 in the forward direction are changed.
When the power of the storage battery X is higher than a lower limit value and the excessive voltage of the load at the side of the output capacitor C0 is lower than the lower limit value, the charging and energy-feeding circuit 2 reversely runs and feeds energy, the power of the storage battery X is reversely converted and output to form a double-fed energy mode together with the power generation output of the main circuit 1, and the charging and energy-feeding circuit 2 reversely works as follows:
the method comprises the following steps: the seventh switching tube V7 is closed;
step two: the seventh switching tube V7 is open;
step three: the eighth switching tube V8 is closed;
step four: the eighth switching tube V8 is open;
the steps are carried out circularly, and based on the conditions met by the steps, the duty ratios of the switching tubes in the steps can be adjusted according to the load requirement of the output capacitor C0 side, so that the reverse output energy feedback voltage and current of the charging and energy feedback circuit 2 are changed.
The bidirectional isolator 3 is internally provided with an electromagnetic isolation link and can convert forward and reverse DC/DC.
Claims (2)
1. A converter system of a direct-voltage double-fed switch reluctance generator is characterized by comprising: the device comprises a storage battery, a main circuit, a charging and energy-feeding circuit, a bidirectional isolator and an output capacitor, wherein the positive and negative ends of the storage battery are respectively connected with the positive and negative input ends of the main circuit and also respectively connected with the positive and negative output ends of the charging and energy-feeding circuit;
the main circuit comprises a first phase circuit, a second phase circuit and a third phase circuit, wherein the first phase circuit, the second phase circuit and the third phase circuit have the same structure, the input positive and negative ends of the first phase circuit, the second phase circuit and the third phase circuit are connected in parallel, namely the input positive ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the input positive end of the main circuit, the input negative ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the input negative end of the main circuit, the output positive and negative ends of the first phase circuit, the second phase circuit and the third phase circuit are connected in parallel, namely the output positive ends of the first phase circuit, the second phase circuit and the third phase circuit are respectively connected with each other and serve as the output positive end of the main circuit, and the output;
the first phase circuit comprises a first switch tube, a second switch tube, a first branch winding of a first phase winding, a second branch winding of the first phase winding, a first capacitor, a second capacitor, a first diode, a second diode and a third diode, wherein the anode of the first switch tube is connected with one end of the second branch winding of the first phase winding and is used as the input positive end of the first phase circuit, the cathode of the first switch tube is connected with one end of the first branch winding of the first phase winding, one end of the first capacitor and the cathode of the second diode, the other end of the second branch winding of the first phase winding is connected with the anode of the second switch tube, the anode of the first diode and one end of the second capacitor, the cathode of the second switch tube is connected with the other end of the first branch winding of the first phase winding and is used as the input negative end of the first phase circuit, the other end of the first capacitor is connected with the cathode of the first diode and the anode of the third diode, the anode of the second diode is connected with the other end of the second capacitor and is used as the output negative end of the first-phase circuit, and the cathode of the third diode is used as the output positive end of the first-phase circuit;
the second phase circuit comprises a third switching tube, a fourth switching tube, a second phase winding first branch winding, a second phase winding second branch winding, a third capacitor, a fourth diode, a fifth diode and a sixth diode, wherein the anode of the third switching tube is connected with one end of the second phase winding second branch winding and is used as the input positive end of the second phase circuit, the cathode of the third switching tube is connected with one end of the second phase winding first branch winding, one end of the third capacitor and the cathode of the fifth diode, the other end of the second phase winding second branch winding is connected with the anode of the fourth switching tube, the anode of the fourth diode and one end of the fourth capacitor, the cathode of the fourth switching tube is connected with the other end of the second phase winding first branch winding and is used as the input negative end of the second phase circuit, and the other end of the third capacitor is connected with the cathode of the fourth diode and the anode of the sixth diode, the anode of the fifth diode is connected with the other end of the fourth capacitor and is used as the output negative end of the second-phase circuit, and the cathode of the sixth diode is used as the output positive end of the second-phase circuit;
the third phase circuit comprises a fifth switching tube, a sixth switching tube, a third phase winding first branch winding, a third phase winding second branch winding, a fifth capacitor, a sixth capacitor, a seventh diode, an eighth diode and a ninth diode, wherein the anode of the fifth switching tube is connected with one end of the third phase winding second branch winding and is used as the input positive end of the third phase circuit, the cathode of the fifth switching tube is connected with one end of the third phase winding first branch winding, one end of the fifth capacitor and the cathode of the eighth diode, the other end of the third phase winding second branch winding is connected with the anode of the sixth switching tube, the anode of the seventh diode and one end of the sixth capacitor, the cathode of the sixth switching tube is connected with the other end of the third phase winding first branch winding and is used as the input negative end of the third phase circuit, the other end of the fifth capacitor is connected with the cathode of the seventh diode and the anode of the ninth diode, the anode of the eighth diode is connected with the other end of the sixth capacitor and serves as the output negative end of the third-phase circuit, and the cathode of the ninth diode serves as the output positive end of the third-phase circuit;
the first phase winding first branch winding and the first phase winding second branch winding form a first phase winding, the second phase winding first branch winding and the second phase winding second branch winding form a second phase winding, and the third phase winding first branch winding and the third phase winding second branch winding form a third phase winding;
the charging and energy-feeding circuit comprises a seventh capacitor, an eighth capacitor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a seventh switch tube, an eighth switch tube, a ninth switch tube, a tenth switch tube, a twelfth pole tube, an eleventh diode, a twelfth diode, a thirteenth diode and a transformer, wherein one end of the seventh capacitor is connected with the anode of the ninth switch tube, the cathode of the twelfth diode and one end of the eleventh capacitor and is used as the input positive end of the charging and energy-feeding circuit, the other end of the seventh capacitor is connected with one end of the eighth capacitor and one end of the secondary side winding of the transformer, the other end of the eighth capacitor is connected with the cathode of the tenth switch tube, the anode of the thirteenth diode and one end of the twelfth capacitor and is used as the input negative end of the charging and energy-feeding circuit, the cathode of the ninth switch tube is connected with the anode of a twelfth diode, the other end of an eleventh capacitor, the anode of the eighth switch tube, the cathode of the eleventh diode, one end of the tenth capacitor and one end of the thirteenth capacitor, the anode of the tenth switch tube is connected with the cathode of the thirteenth diode, the other end of the twelfth capacitor, the cathode of the seventh switch tube, the anode of the twelfth diode and one end of the ninth capacitor, and is used as the output cathode end of the charging and energy-feeding circuit, the anode of the seventh switch tube is connected with the cathode of the twelfth diode, the other end of the ninth capacitor, the cathode of the eighth switch tube, the anode of the eleventh diode, the other end of the tenth capacitor, one end of the primary side winding of the transformer and the other end of the secondary side winding of the transformer, the other end of the primary side winding of the transformer is connected with the other, the windings on both sides of the transformer are reversed in polarity.
2. The control method of the converter system of the direct-voltage double-fed switched reluctance generator according to claim 1, wherein according to the operation principle of the switched reluctance generator and the rotor position information thereof, when the first phase winding is required to be put into operation, the first phase circuit is put into operation, the first switching tube and the second switching tube are firstly closed to enter an excitation stage, and after the excitation stage is finished according to the rotor position information, the first switching tube and the second switching tube are disconnected to enter a power generation stage;
when a second-phase winding and a third-phase winding are required to be put into operation according to the position information of the rotor, the corresponding second-phase circuit and the corresponding third-phase circuit are respectively put into operation, the operation mode is completely the same as that of the first-phase circuit, and the corresponding relation of the specific switching devices is as follows: the third switching tube and the fifth switching tube correspond to the first switching tube, and the fourth switching tube and the sixth switching tube correspond to the second switching tube;
when the electric quantity of the storage battery is detected to be lower than the lower limit value, the charging and energy feedback circuit is put into operation and operates in the forward direction, the charging and energy feedback circuit outputs electric energy to charge the storage battery, and the charging and energy feedback circuit operates in the forward direction in the following steps:
the method comprises the following steps: the tenth switching tube is closed;
step two: the eighth switching tube is closed;
step three: the eighth switching tube and the tenth switching tube are disconnected;
step four: the ninth switching tube is closed;
step five: the ninth switching tube is disconnected;
the steps are carried out circularly, on the basis that the steps meet the conditions, the duty ratio of each switching tube in the steps can be adjusted according to the requirement of the storage battery, and the charging voltage and the current output by the charging and energy feedback circuit in the forward direction are changed;
when the electric energy of the storage battery is higher than the lower limit value and the excessive voltage of the side load of the output capacitor is lower than the lower limit value, the charging and energy-feeding circuit reversely operates and feeds energy, the electric energy of the storage battery is reversely converted and output, and the charging and energy-feeding circuit reversely works as follows:
the method comprises the following steps: the seventh switch tube is closed;
step two: the seventh switch tube is disconnected;
step three: the eighth switching tube is closed;
step four: the eighth switching tube is disconnected;
the steps are carried out circularly, and based on the condition that the steps meet, according to the requirement of a load on the side of an output capacitor, the duty ratio of each switching tube in the steps can be adjusted, and the reverse output energy feedback voltage and current of the charging and energy feedback circuit are changed.
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Application publication date: 20190906 Assignee: Xinchang County niukan Agricultural Development Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000132 Denomination of invention: A Converter System for Direct Boost Doubly Fed Switched Reluctance Generator Granted publication date: 20210212 License type: Common License Record date: 20230311 Application publication date: 20190906 Assignee: Xinchang neodymium Ru Agricultural Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000134 Denomination of invention: A Converter System for Direct Boost Doubly Fed Switched Reluctance Generator Granted publication date: 20210212 License type: Common License Record date: 20230311 Application publication date: 20190906 Assignee: Shaoxing Jienan Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000128 Denomination of invention: A Converter System for Direct Boost Doubly Fed Switched Reluctance Generator Granted publication date: 20210212 License type: Common License Record date: 20230311 Application publication date: 20190906 Assignee: Xinchang Huandi Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000130 Denomination of invention: A Converter System for Direct Boost Doubly Fed Switched Reluctance Generator Granted publication date: 20210212 License type: Common License Record date: 20230311 |
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Assignee: Xinchang Daochong Pet Products Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000204 Date of cancellation: 20240807 Assignee: Xinchang County facheng Agricultural Development Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000203 Date of cancellation: 20240807 Assignee: Shaoxing Yuanyi Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000202 Date of cancellation: 20240807 Assignee: XINCHANG COUNTY XIAOBUDIAN AGRICULTURAL DEVELOPMENT Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000201 Date of cancellation: 20240807 Assignee: Xinchang neodymium Ru Agricultural Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000134 Date of cancellation: 20240807 Assignee: Xinchang County niukan Agricultural Development Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000132 Date of cancellation: 20240807 Assignee: Xinchang Huandi Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000130 Date of cancellation: 20240807 Assignee: Shaoxing Jienan Technology Co.,Ltd. Assignor: China Jiliang University Contract record no.: X2023330000128 Date of cancellation: 20240807 |