CN101166001A - Active bi-directional electric power adjuster - Google Patents
Active bi-directional electric power adjuster Download PDFInfo
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- CN101166001A CN101166001A CNA2006101409571A CN200610140957A CN101166001A CN 101166001 A CN101166001 A CN 101166001A CN A2006101409571 A CNA2006101409571 A CN A2006101409571A CN 200610140957 A CN200610140957 A CN 200610140957A CN 101166001 A CN101166001 A CN 101166001A
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Abstract
This invention relates to an active two-way power regulator including a DC end, a two-way DC/DC power converter, a DC/AC inverter and an AC end, in which, said DC end can be connected to a DC supply, said two-way DC/DC converter utilizes a HF pulse width modulation technology to generate a pre-set DC voltage or a DC current, said DC/AC inverter is taken as a LF reversing gear to convert the DC voltage or current to a preset AC voltage or current and the AC end can be connected to a load and an AC supply selectively.
Description
Technical field
The present invention relates to a kind of bi-directional electric power adjuster, particularly relate to the active bi-directional electric power adjuster that utilizes a two-way DC-DC electric power converter and a DC/AC inverter to form.
Background technology
The active electric power adjuster is commonly used to improve the electric power quality of load and improves the load electric characteristic, for example the dc terminal of active electric power adjuster connects a storage battery, to form an off-line type uninterruptible power system, this off-line type uninterruptible power system is worked as mains-supplied just often, civil power is via the bypass path of this off-line type uninterruptible power system inside, give a load with power supply, and to the charge in batteries of this off-line type uninterruptible power system inside; When mains-supplied was unusual, this off-line type uninterruptible power system was converted into an AC energy with the direct current energy of the storage battery of inside, so that supply with this load, and then prevented the influence that this load is cut off the power supply.Yet; reason owing to cost and technology; the output voltage waveforms of tradition off-line type uninterruptible power system discharge mostly is square wave; this square-wave output voltage to some load (for example: transformer) will work the mischief; when if the off-line type uninterruptible power system of this square-wave output voltage is connected to the power supply unit load with power factor correction; also can cause the off-line type uninterruptible power system generation overcurrent protection of this square-wave output voltage, and then cause damage.
In view of the above problems, the off-line type uninterruptible power system device of many sine voltage output is developed out, the off-line type uninterruptible power system of sine voltage output of the prior art, as United States Patent (USP) the 5th, 625, No. 539, it discloses works as mains-supplied just often, by the required energy of this load of commercial power supply; When mains-supplied is unusual, utilize a unidirectional DC-DC electric power converter will be stored in the direct current energy that storage battery low voltage and direct current energy boost conversion becomes a high voltage, and store energy in the direct current capacitor of a big capacitance, the electric energy that relies on the DC/AC inverter of high frequency switching full-bridge formula will be stored in this capacitor then converts sinusoidal voltage to and exports this load to; Other is provided with one group of charger, and it is just often to be responsible for charge in batteries in mains-supplied, this circuit structure control circuit complexity, and two-stage transducers is all high frequency and switches, and causes efficient low; In addition, the direct current capacitor that needs a big capacitance is not suitable for sinewave output off-line type uninterruptible power system cheaply as the energy snubber between the secondary electric power converter.
The off-line type uninterruptible power system of another existing sinewave output, as United States Patent (USP) the 6th, 094, No. 363, it discloses works as mains-supplied just often, by the required energy of this load of commercial power supply; When mains-supplied is unusual, utilize a unidirectional DC-DC electric power converter accumulator DC voltage rise to be pressed the voltage waveform that converts a similar full-wave rectification to, rely on low frequency to switch DC/AC inverter then, convert the voltage waveform of this full-wave rectification to a sinusoidal voltage and export this load to; Other is provided with the charger of one group of tool energy recovery function, be responsible for the work of charge in batteries or reclaim unnecessary energy to storage battery, this circuit structure does not need the direct current capacitor of a big capacitance to make energy snubber between the secondary electric power converter, and having only a power conversion stage to make high frequency switches, therefore having control circuit simply reaches the high advantage of efficient, but one group of extra charger of needs is to charge in batteries and reclaim unnecessary load capacity, will cause the increase of cost.
In addition, the dc terminal of active electric power adjuster also can be connected to a solar cell or other renewable energy resources, with power conversion interface as this solar cell or other renewable energy resources and a distribution system, the power conversion interface of traditional solar cell and this distribution system comprises two power conversion stage (DC-DC converter and a DC/AC inverter), as United States Patent (USP) the 6th, 914, No. 418, it utilizes this DC-DC converter to convert the low-voltage direct electric energy that solar cell produces to the high voltage direct current electric energy, and store energy in the direct current capacitor of a big capacitance, the electric energy that relies on the DC/AC inverter of high frequency switching full-bridge formula will be stored in this direct current capacitor then converts that sinusoidal voltage exports this load to or simple sinusoidal alternating current is sent this distribution system back to, yet two power conversion stage of the power conversion interface of this solar cell are all utilized the control of high-frequency pulsed width modulation technology, the capacitor of this circuit structure needs one big capacitance is made the energy snubber between the secondary electric power converter, the control circuit complexity, and this two-stage transducers is all high frequency to be switched, and causes its efficient on the low side.
Summary of the invention
Main purpose of the present invention is to solve above-mentioned problems of the prior art, and a kind of active bi-directional electric power adjuster is provided.
According to active bi-directional electric power adjuster of the present invention, it comprises a dc terminal, a two-way DC-DC electric power converter, a DC/AC inverter and an interchange end.Wherein, a dc terminal, it is connected to a DC power supply; A bidirectional, dc/direct current power transducer, it is connected to this dc terminal, and this bidirectional, dc/direct current power transducer utilizes the high-frequency pulsed width modulation control technology, can produce one of them signal of a default direct voltage and direct current; A DC/AC inverter, it is connected to this bidirectional, dc/direct current power transducer, and this DC/AC inverter is done low frequency commutation and become one of them signal of a default alternating voltage and alternating current in order to one of them conversion of signals of default direct voltage that this bidirectional, dc/direct current power transducer is produced and direct current; And an interchange end, it is connected to this DC/AC inverter, and this interchange end is connected to a load, and can select to be connected to an AC power.
A kind of active bi-directional electric power adjuster provided by the invention is to rely on a two-way DC-DC electric power converter to utilize the control of high-frequency pulsed width modulation technology to produce a default direct voltage or a direct current, and a DC/AC inverter carries out low frequency commutation and converts an alternating voltage or an alternating current of presetting to direct voltage or the direct current that will preset, the circuit structure of active bi-directional electric power adjuster of the present invention does not need the direct current capacitor of a big capacitance to make energy snubber between the secondary electric power converter, do not need an extra charger, and have only a power conversion stage to make high frequency and switch, it is little therefore to have a volume, control circuit is simple, the effect that improved efficiency and cost reduce.
Description of drawings
Fig. 1: the structural representation of the active bi-directional electric power adjuster of the present invention's first preferred embodiment.
Fig. 2: the bidirectional, dc of the active bi-directional electric power adjuster of the present invention's first preferred embodiment/direct current power converter circuit figure.
Fig. 3: the DC/AC inverter circuit diagram of the active bi-directional electric power adjuster of the present invention's first preferred embodiment.
Fig. 4: the electrical block diagram the when active bi-directional electric power adjuster of the present invention's first preferred embodiment is applied to have merit because of the uninterruptible power system of debugging functions.
Fig. 5 a: the active bi-directional electric power adjuster of the present invention's first preferred embodiment is applied to have the uninterruptible power system of merit because of debugging functions, and this bidirectional, dc/direct current power transducer is at this AC power control calcspar just often.
Fig. 5 b: the active bi-directional electric power adjuster of the present invention's first preferred embodiment is applied to have the uninterruptible power system of merit because of debugging functions, and the control calcspar of this bidirectional, dc/direct current power transducer when AC power breaks down.
Fig. 6: the active bi-directional electric power adjuster of the present invention's first preferred embodiment is applied to have the initiatively uninterruptible power system of electric-power filter function, and the control calcspar of this bidirectional, dc/direct current power transducer when active electric-power filter function.
Fig. 7: the active bi-directional electric power adjuster of the present invention's first preferred embodiment is applied to the structural representation of solar electric power supply system.
Fig. 8: the bidirectional, dc of the active bi-directional electric power adjuster of the present invention's second preferred embodiment/direct current power converter circuit figure.
Fig. 9: the bidirectional, dc of the active bi-directional electric power adjuster of the present invention's the 3rd preferred embodiment/direct current power converter circuit figure.
[primary clustering symbol description]
1 active bi-directional electric power adjuster, 10 dc terminal
11 bidirectional, dcs/direct current power transducer 12 DC/AC inverters 13 exchange end
2 storage batterys, 3 loads, 4 AC power
5 switches, 60 charge controllers, 61 signal generators
62 multipliers, 63 controllers, 64 pulse width modulators
65 absolute value circuits, 66 controllers, 67 pulse width modulators
70 charge controllers, 71 multipliers, 72 signal generators
73 counting circuits, 74 adders, 75 polarity decision circuitry
76 multipliers, 77 controllers, 78 pulse width modulators
8 solar cells, 9 energy-storage system Qa2 electronic power switches
Q1 electronic power switch Qa1 electronic power switch Q1 electronic power switch
Q3 electronic power switch Q4 electronic power switch Q5 electronic power switch
Q6 electronic power switch Qb1 electronic power switch Qb2 electronic power switch
Qc1 electronic power switch Qc2 electronic power switch Qc3 electronic power switch
Qc4 electronic power switch C filter capacitor C2 equivalent capacitance device
C3 equivalent capacitance device L inductance
Embodiment
For further describing each technical scheme of the present invention, existing with the preferred embodiments of the present invention, and in conjunction with the accompanying drawings, be described in detail below:
Please refer to shown in Figure 1ly, the active bi-directional electric power adjuster 1 of the present invention's first preferred embodiment comprises a dc terminal 10, one two-way DC-DC electric power converter 11, a DC/AC inverter 12 and one and exchanges end 13.This dc terminal 10 can be connected to a direct current power supply.
Please refer to the bidirectional, dc/direct current power transducer 11 of the present invention's first preferred embodiment shown in Figure 2.This bidirectional, dc/direct current power transducer 11 is by four electronic power switch Qa1, Qa2, Q1, Q2, an one high-frequency isolation transformer Tr and an inductance L are formed, this electronic power switch Qa1 respectively, Qa2, Q1 and Q2 are formed in parallel by a power electronic switch assembly and a diode reverse respectively, wherein this electronic power switch Qa1 and Qa2 are positioned at the primary side of this high-frequency isolation transformer, so that primary side forms a push-pull type structure and is connected to this dc terminal 10, and this electronic power switch Q1 and Q2 are positioned at the secondary side of this high-frequency isolation transformer, when electric energy carries out two-way transmission, this electronic power switch Qa1, Qa2, Q1 and Q2 all carry out high-frequency pulsed width modulation control, the wherein change action complementation of this electronic power switch Qa1 and Q1, and the change action complementation of this electronic power switch Qa2 and Q2, its turn-on cycle of the switching of this power semiconductor switches Qa1 and Qa2 is all less than 0.5, and differs 180 degree; When electric energy is only transmitted toward primary side by secondary side, this electronic power switch Qa1 and Qa2 end fully, only this electronic power switch Q1 and Q2 carry out high-frequency pulsed width modulation control, cooperate the diode in electronic power switch Qa1 and the Qa2, this moment, this bidirectional, dc/direct current power transducer 11 was operable to a current fed push-pull type DC-DC converter.
Please refer to shown in Figure 3ly, the circuit structure of the DC/AC inverter 12 of the present invention's first preferred embodiment comprises four electronic power switch Q3, Q4, Q5, Q6 and a filter capacitor C.Respectively this electronic power switch Q3, Q4, Q5 and Q6 are formed in parallel by a power electronic switch assembly and a diode reverse, when energy only exchanges end 13 toward dc terminal 10 transmission by this, all electronic power switch Q3, Q4, Q5 and Q6 all end, and utilize this moment the diode in this electronic power switch Q3, Q4, Q5 and the Q6 to form a rectifier; And when energy carries out two-way transmission, this electronic power switch Q3, Q4, Q5 and Q6 utilize low-frequency square-wave handoff technique control (being tending towards 50/60Hz), wherein this electronic power switch Q3 is identical with the change action of Q6, this electronic power switch Q4 is identical with the change action of Q5, and the change action complementation of this electronic power switch Q3 and Q4.
Please refer to shown in Figure 4, the circuit structure when this active bi-directional electric power adjuster first preferred embodiment is applied to have merit because of the uninterruptible power system of debugging functions.This dc terminal 10 is connected to a direct current power supply, and this DC power supply can be a storage battery 2, and it is in parallel with a load 3 that this exchanges end 13, and an AC power 4 is connected to this interchange end 13 through a switch 5.When this AC power 4 is powered just often, this AC power 4 is supplied electric energy to this load 3 via this switch 5, and rely on 2 chargings of 1 pair of this storage battery of this active bi-directional electric power adjuster, that is the electric energy of this active bi-directional electric power adjuster 1 flows to this dc terminal 10 by this interchange end 13, this moment, this active bi-directional electric power adjuster 1 had merit because of debugging functions, that is the expectation electric current that flows into this active bi-directional electric power adjuster 1 is the string ripple electric current with these AC power 4 homophases.
Refer again to shown in Figure 3, the circuit structure of this DC/AC inverter 12, when this AC power 4 is powered just often, when electric energy flows to this dc terminal 10 by this interchange end 13, this moment, four electronic power switch Q3, Q4, Q5 and Q6 of this DC/AC inverter 12 all ended, because each electronic power switch Q3, Q4, Q5 and Q6 all comprise a diode, so this DC/AC inverter 12 is operable to a rectifier.
Refer again to shown in Figure 2, the circuit structure of this bidirectional, dc/direct current power transducer 11, when this AC power 4 is powered just often, when electric energy flows to this dc terminal 10 by this interchange end 13, this moment, the electric energy of this bidirectional, dc/direct current power transducer 11 was only transmitted toward primary side by secondary side, the secondary side electronic power switch Q1 of the high-frequency isolation transformer of this bidirectional, dc/direct current power transducer 11 and Q2 do high-frequency pulsed width modulation control, the primary side electronic power switch of this high-frequency isolation transformer ends fully, this moment, this bidirectional, dc/direct current power transducer 11 was operable to a current fed push-pull type DC-DC converter, rely on the secondary side electronic power switch Q1 of high-frequency isolation transformer of this bidirectional, dc/direct current power transducer 11 and the control of Q2, the electric current that makes the inductance L of this bidirectional, dc/direct current power transducer 11 is the controlled string ripple rectified waveform of an amplitude, via these DC/AC inverter 12 commutations, the input current of this interchange end 13 be tending towards one with the synchronous string ripple of voltage of this AC power 4, with reach be tending towards specific work because of function, and rely on the amplitude of string ripple rectified waveform to control the charge volume of this storage battery 2.
Extremely shown in Figure 4 referring again to Fig. 2, when these AC power 4 abnormal electrical power supplies, this switch 5 disconnects, and the energy storage of this storage battery 2 converts a voltage that is tending towards the string ripple to through this active bi-directional electric power adjuster 1, to provide this load 3 required electric energy, that is the electric energy of this active bi-directional electric power adjuster 1 flows to this interchange end 13 by this dc terminal 10, yet the electric energy of this bidirectional, dc/direct current power transducer 11 is when considering this load 3 for non-pure resistance, its instantaneous electric energy possibility two-way flow, so this electronic power switch Qa1 of this bidirectional, dc/direct current power transducer 11, Qa2, Q1 and Q2 all do high-frequency pulsed width modulation control, this electronic power switch Qa1, Qa2, the action of Q1 and Q2, please refer to the explanation of the two-way translator unit of electric energy in the bidirectional, dc/direct current power transducer 11 of Fig. 2 and the present invention's first preferred embodiment, utilize the control of the electronic power switch of this bidirectional, dc/direct current power transducer 11, the output voltage that makes this bidirectional, dc/direct current power transducer 11 is a string ripple rectified waveform, its frequency is tending towards the twice of these AC power 4 frequencies, consider this load 3 possibility non-pure resistances again, so its instantaneous energy may exchange end 13 and 10 two-way transmission of this dc terminal at this, so four electronic power switch Q3 of this DC/AC inverter 12, Q4, Q5 and Q6 make low-frequency square-wave and switch, its low-frequency square-wave switching frequency is tending towards the frequency of this AC power 4, so that be one to exchange the string wave voltage and hold 13 to deliver to this load 3 through this interchanges with the output string ripple rectified waveform voltage commutation of this bidirectional, dc/direct current power transducer 11.
Please refer to shown in Fig. 5 (a), this active bi-directional electric power adjuster first preferred embodiment is applied to have the uninterruptible power system of merit because of debugging functions, and this bidirectional, dc/direct current power transducer 11 is at this AC power 4 control calcspar just often.This active bi-directional electric power adjuster 1 in these AC power 4 power supplies just often, the voltage of this storage battery 2 is delivered to a charge controller 60 after detecting, these AC power 4 voltages are delivered to a signal generator 61 after detecting, to produce the string ripple rectified signal of a unit amplitude, the frequency of this unit amplitude string ripple rectified signal is the twice of these AC power 4 frequencies, and the voltage of its zero point and this AC power 4 is synchronous, the output of this charge controller 60 and this unit amplitude string ripple rectified signal are delivered to a multiplier 62 and be multiply by mutually and obtain a reference signal, the inductance L electric current of this bidirectional, dc/direct current power transducer 11 is delivered to a controller 63 with this reference signal after detecting, this controller 63 outputs one signal, this signal is delivered to a pulse width modulator 64, to produce this bidirectional, dc/secondary side electronic power switch Q1 of direct current power transducer 11 high-frequency isolation transformer and the control signal of Q2.
Please refer to shown in Fig. 5 (b), this active bi-directional electric power adjuster first preferred embodiment is applied to have the uninterruptible power system of merit because of debugging functions, and the control square of this bidirectional, dc/direct current power transducer 11 when AC power 4 breaks down.The voltage of this interchange end 13 is delivered to an absolute value circuit 65 after detecting, the output of this absolute value circuit 65 and a reference signal are delivered to a controller 66, this reference signal is a string ripple rectified signal, and the control signal of a pulse width modulator 67 with this electronic power switch Qa1, Qa2, Q1 and the Q2 that produce this bidirectional, dc/direct current power transducer 11 delivered in 66 outputs of this controller.
Extremely shown in Figure 4 referring again to Fig. 2, active bi-directional electric power adjuster first preferred embodiment of the present invention also can be applicable to have the initiatively uninterruptible power system of electric-power filter function, its circuit structure is identical, only different in control when being applied to have merit because of the uninterruptible power system of debugging functions.Refer again to Fig. 4, when this AC power 4 is powered just often, this AC power 4 is supplied electric energy to this load 3 via this switch 5, and by 2 chargings of 1 pair of this storage battery of this active bi-directional electric power adjuster, this moment, this active bi-directional electric power adjuster 1 also had the initiatively function of electric-power filter, in order to the humorous virtual work that involves that this load 3 of filtering produces, the electric current that makes this AC power 4 is for tending to be and the synchronous string ripple of voltage.Because when this active bi-directional electric power adjuster 1 operates in active electric-power filter function, its instantaneous energy may exchange end 13 and 10 two-way transmission of this dc terminal at this, therefore four electronic power switch Q3, Q4, Q5 and Q6 of this bidirectional, dc/a-c transducer 12 do the low-frequency square-wave switching, and its low-frequency square-wave switching frequency equals the frequency of this AC power 4; And this active bi-directional electric power adjuster 1 is when operating in initiatively the electric-power filter function, the electric energy of this bidirectional, dc/direct current power transducer 11 also is two-way transfer mode, so this electronic power switch Qa1 of this bidirectional, dc/direct current power transducer 11, Qa2, Q1 and Q2 all do high-frequency pulsed width modulation control, this electronic power switch Qa1, Qa2, the action of Q1 and Q2 please refer to the explanation of the two-way translator unit of electric energy in the bidirectional, dc/direct current power transducer 11 of Fig. 2 and the present invention's first preferred embodiment, utilize the control of the electronic power switch of this bidirectional, dc/direct current power transducer 11, the inductance L electric current that can make this bidirectional, dc/direct current power transducer 11 is the rectified waveform of an offset current, this offset current comprises one and to inject a real merit 2 chargings of this storage battery and these load 3 electric currents humorous is involved the virtual work composition with the harmonic current of this load 3 of filtering and compensate virtual work with the synchronous string ripple of these AC power 4 voltages, the rectified waveform electric current of this offset current produces an AC compensation electric current and exchanges end 13 outputs by this after these bidirectional, dc/a-c transducer 12 commutations, this AC compensation electric current inject the electric current that can make this AC power 4 after this AC power 4 for and the synchronous string ripple of voltage, with reach be tending towards specific work because of.When these AC power 4 abnormal electrical power supplies, the principle when its operating principle is applied to have merit because of the debugging functions uninterruptible power system with this active bi-directional electric power adjuster 1 is identical, no longer describes in detail.
Please refer to shown in Figure 6ly, active bi-directional electric power adjuster first preferred embodiment of the present invention is applied to have the initiatively uninterruptible power system of electric-power filter function, and the control calcspar when operating in electric-power filter function initiatively.After detecting, the voltage of this storage battery 2 delivers to a charge controller 70, deliver to a signal generator 72 after these AC power 4 voltages detect and produce a fundamental frequency string ripple signal, this fundamental frequency string ripple signal is identical with these AC power 4 electric voltage frequencies and phase place is identical, this charge controller 70 is delivered to a multiplier 71 with the output of this signal generator 72 and is multiplied each other, these load 3 electric currents and this AC power 4 voltages are delivered to a counting circuit 73 after detecting, this counting circuit 73 is output as the harmonic current and the fundamental frequency virtual work electric current composition sum of this load 5, this multiplier 71 is delivered to an adder 74 additions with the output of this counting circuit 73 and can be obtained this compensating current signal, these AC power 4 voltages are also delivered to a polarity decision circuitry 75 to obtain one just/negative unit signal (promptly ± 1) after detecting, this adder 74 is delivered to a multiplier 76 with the output of this polarity decision circuitry 75 and is multiplied each other, deliver to a controller 77 after the inductance L electric current of the output of this multiplier 76 and this bidirectional, dc/direct current power transducer 11 detects, these controller 77 outputs are delivered to a pulse width modulator 78 to produce this electronic power switch Qa1 of this bidirectional, dc/direct current power transducer 11, Qa2, the control signal of Q1 and Q2.
The circuit structure that is applied to uninterruptible power system to active bi-directional electric power adjuster first preferred embodiment of the present invention shown in Figure 4 by Fig. 2 and traditional active electric power adjuster are as the comparison of off-line type uninterruptible power system, do not make energy snubber between the secondary electric power converter owing to do not need the direct current capacitor of a big capacitance, do not need an extra charger, and have only a power conversion stage to make high frequency and switch, the effect that have therefore that volume is little, control circuit simple, improved efficiency and cost reduces.
Please refer to shown in Figure 7ly, active bi-directional electric power adjuster 1 of the present invention is applied to a solar electric power supply system.This dc terminal 10 also is connected to a direct current power supply, and this DC power supply is a solar cell 8 and an energy-storage system 9, and this energy-storage system 9 comprises a storage battery and charge/discharge device thereof, and it is in parallel with this load 3 that this exchanges end 13.This active bi-directional electric power adjuster 1 is applied to a solar electric power supply system and mainly is transformed into an AC energy in order to the direct current energy with this solar cell 8 and/or this energy-storage system 9 and supplies with this load 3, it is identical because of the uninterruptible power system of debugging functions and the principle when these AC power 4 faults that its operating principle and this active bi-directional electric power adjuster 1 are applied to have merit, no longer describes in detail.
Be applied to the circuit structure of solar electric power supply system and traditional active electric power adjuster relatively by Fig. 2, Fig. 3 and active bi-directional electric power adjuster of the present invention first preferred embodiment shown in Figure 7 as the power conversion interface of solar energy system, do not make energy snubber between the secondary electric power converter owing to do not need the direct current capacitor of a big capacitance, and have only a power conversion stage to make high frequency and switch, the effect that have therefore that volume is little, control circuit simple, improved efficiency and cost reduces.
Please refer to shown in Figure 8, second preferred embodiment of active bi-directional electric power adjuster 1 of the present invention, compared to first preferred embodiment, second preferred embodiment is the circuit structure difference of this bidirectional, dc/direct current power transducer 11 only, so Fig. 8 only discloses the side circuit of this bidirectional, dc/direct current power transducer 11.Compared to first preferred embodiment, the bidirectional, dc of second preferred embodiment/direct current power transducer 11 comprises four electronic power switch Qb1, Qb2, Q1, Q2, two equivalent capacitor C2, C3, an one high-frequency isolation transformer Tr and an inductance L, this electronic power switch Qb1 respectively, Qb2, Q1 and Q2 are formed in parallel by a power electronic switch assembly and a diode reverse respectively, wherein this electronic power switch Qb1 and Qb2 are positioned at the primary side of this high-frequency isolation transformer, and cooperate this two equivalent capacitor C2 and C3 to form half bridge architecture in primary side, and this electronic power switch Q1 and Q2 are positioned at the secondary side of this high-frequency isolation transformer, when electric energy carries out two-way transmission, this electronic power switch Qb1, Qb2, Q1 and Q2 all do high-frequency pulsed width modulation control, the wherein change action complementation of this power semiconductor switches Qb1 and Q1, the change action complementation of this power semiconductor switches Qb2 and Q2, and its turn-on cycle of the switching of this power semiconductor switches Qb1 and Qb2 is all less than 0.5, and differs 180 degree; And when electric energy is only transmitted toward primary side by secondary side, this electronic power switch Qb1 and Qb2 end fully, only this electronic power switch Q1 and Q2 do high-frequency pulsed width modulation control, and this moment, this bidirectional, dc/direct current power transducer 11 was operable to a current fed push-pull type DC-DC converter.
Please refer to shown in Figure 9, the 3rd preferred embodiment of active bi-directional electric power adjuster 1 of the present invention, compared to first preferred embodiment, the 3rd preferred embodiment is the circuit structure difference of this bidirectional, dc/direct current power transducer 11 only, so Fig. 9 only discloses the side circuit of this bidirectional, dc/direct current power transducer 11.Compared to first and second preferred embodiment, the bidirectional, dc of the 3rd preferred embodiment/direct current power transducer 11 comprises six electronic power switch Qc1, Qc2, Qc3, Qc4, Q1 and Q2, a high-frequency isolation transformer Tr and an inductance L.Respectively this electronic power switch Qc1, Qc2, Qc3, Qc4, Q1 and Q2 are formed in parallel by a power electronic switch assembly and a diode reverse, wherein this electronic power switch Qc1, Qc2, Qc3 and Qc4 are positioned at the primary side of this high-frequency isolation transformer, so that primary side forms a full-bridge type structure, and electronic power switch Q1 and Q2 are positioned at the secondary side of this high-frequency isolation transformer.When electric energy carries out two-way transmission, this electronic power switch Qc1, Qc2, Qc3, Qc4, Q1 and Q2 all do high-frequency pulsed width modulation control, wherein this power semiconductor switches Qc1 is identical with the change action of Qc4, and with the change action complementation of this power semiconductor switches Q1; This power semiconductor switches Qc2 is identical with the change action of Qc3, and with the change action complementation of this power semiconductor switches Q2, and its turn-on cycle of the switching of this electronic power switch Qc1 and Qc2 is all less than 0.5, and differs 180 degree; And when electric energy is only transmitted toward primary side by secondary side, this electronic power switch Qc1, Qc2, Qc3 and Qc4 end fully, only this electronic power switch Q1 and Q2 do high-frequency pulsed width modulation control, and this moment, this bidirectional, dc/direct current power transducer 11 was operable to a current fed push-pull type DC-DC converter.
Claims (20)
1. active bi-directional electric power adjuster is characterized in that it comprises:
A dc terminal, it is connected to a DC power supply;
A bidirectional, dc/direct current power transducer, it is connected to this dc terminal, and this bidirectional, dc/direct current power transducer utilizes the high-frequency pulsed width modulation control technology, can produce one of them signal of a default direct voltage and direct current;
A DC/AC inverter, it is connected to this bidirectional, dc/direct current power transducer, and this DC/AC inverter is done low frequency commutation and become one of them signal of a default alternating voltage and alternating current in order to one of them conversion of signals of default direct voltage that this bidirectional, dc/direct current power transducer is produced and direct current; And
One exchanges end, and it is connected to this DC/AC inverter, and this interchange end is connected to a load, and can select to be connected to an AC power.
2. active bi-directional electric power adjuster according to claim 1 is characterized in that, this DC power supply is a storage battery.
3. active bi-directional electric power adjuster according to claim 1 is characterized in that, this DC power supply is a solar cell and an energy-storage system.
4. active bi-directional electric power adjuster according to claim 3 is characterized in that, this energy-storage system is provided with a storage battery and charge/discharge device thereof.
5. active bi-directional electric power adjuster according to claim 1, it is characterized in that, this bidirectional, dc/direct current power transducer is provided with several electronic power switch groups, a high-frequency isolation transformer and an inductance, and this high-frequency isolation transformer has a primary side and a secondary side.
6. active bi-directional electric power adjuster according to claim 5 is characterized in that, the electronic power switch of this bidirectional, dc/direct current power transducer is formed in parallel by a power electronic switch assembly and a diode reverse.
7. active bi-directional electric power adjuster according to claim 5, it is characterized in that, the primary side of the high-frequency isolation transformer of this bidirectional, dc/direct current power transducer and secondary side respectively are provided with two electronic power switches, these two electronic power switches form a push-pull type structure, and are connected to this DC/AC inverter via this inductance.
8. active bi-directional electric power adjuster according to claim 5 is characterized in that, the primary side of the high-frequency isolation transformer of this bidirectional, dc/direct current power transducer is provided with two electronic power switches, and these two electronic power switches form a push-pull type structure.
9. active bi-directional electric power adjuster according to claim 5, it is characterized in that, the primary side of the high-frequency isolation transformer of this bidirectional, dc/direct current power transducer is provided with the direct current capacitor that two electronic power switches equate with two capacity, and the direct current capacitor that these two electronic power switches equate with two capacity forms a semibridge system structure.
10. active bi-directional electric power adjuster according to claim 5, it is characterized in that, the primary side of the high-frequency isolation transformer of this bidirectional, dc/direct current power transducer is provided with four electronic power switches, and these four electronic power switches form a full-bridge type structure.
11. active bi-directional electric power adjuster according to claim 5, it is characterized in that, the energy of this bidirectional, dc/direct current power transducer is passed toward primary side by the secondary side of high-frequency isolation transformer, the electronic power switch group of the primary side of this high-frequency isolation transformer is all ended, and the electronic power switch group of the secondary side of this high-frequency isolation transformer utilizes high-frequency pulsed width modulation to control.
12. active bi-directional electric power adjuster according to claim 5, it is characterized in that, the energy of this bidirectional, dc/direct current power transducer is two-way transmission, the electronic power switch group of the primary side of this high-frequency isolation transformer and secondary side utilizes high-frequency pulsed width modulation to control, and the change action of the electronic power switch group of the primary side of this high-frequency isolation transformer and secondary side is complementary.
13. active bi-directional electric power adjuster according to claim 1 is characterized in that, this DC/AC inverter is provided with an electronic power switch group and a filter capacitor.
14. active bi-directional electric power adjuster according to claim 13 is characterized in that, the electronic power switch of this DC/AC inverter is formed in parallel by a power electronic switch assembly and a diode reverse.
15. active bi-directional electric power adjuster according to claim 13 is characterized in that, this DC/AC inverter is a full-bridge type structure.
16. active bi-directional electric power adjuster according to claim 13 is characterized in that, when energy was sent to this dc terminal by this interchange end, this electronic power switch group of this DC/AC inverter was all ended, and this DC/AC inverter forms a rectifier.
17. active bi-directional electric power adjuster according to claim 13, it is characterized in that, energy is when this exchanges between end and this dc terminal two-way transmission, and the electronic power switch group of this DC/AC inverter utilizes the low-frequency square-wave handoff technique to control, and its frequency is tending towards this ac power frequency.
18. active bi-directional electric power adjuster according to claim 1, it is characterized in that, this AC power is connected to this interchange end via a switch, the supply electric energy is to this load, and the supply electric energy charges to this DC power supply via this active bi-directional electric power adjuster, it is a string ripple rectified waveform that the electronic power switch group of this bidirectional, dc/direct current power transducer is controlled this inductive current, via this DC/AC inverter commutation, the input current of holding in this interchange is to be tending towards a synchronous string ripple of the voltage with this AC power.
19. active bi-directional electric power adjuster according to claim 1, it is characterized in that, this AC power is connected to this interchange end via a switch, the supply electric energy is to this load, and the supply electric energy charges to this DC power supply via this active bi-directional electric power adjuster, this active bi-directional electric power adjuster also has the initiatively function of electric-power filter, utilize the electronic power switch group of this bidirectional, dc/direct current power transducer to control the rectified waveform that this inductive current is an offset current, the rectified waveform electric current of this offset current exchanges end via this DC/AC inverter commutation back at this and produces an AC compensation electric current, this AC compensation electric current can make its electric current be and the synchronous string ripple of voltage after injecting this AC power, with the humorous virtual work that involves of this load generation of filtering.
20. active bi-directional electric power adjuster according to claim 1, it is characterized in that, when this active bi-directional electric power adjuster is supplied electric energy to this load separately, utilize the control of the electronic power switch group of this bidirectional, dc/direct current power transducer, this DC power supply energy storage is converted to the electric energy of tool string ripple rectified waveform voltage, again via making the voltage of this interchange end be tending towards a string ripple after this DC/AC inverter commutation, to supply with this load.
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| CNB2006101409571A CN100563086C (en) | 2006-10-16 | 2006-10-16 | Active bi-directional electric power adjuster |
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| CNB2006101409571A CN100563086C (en) | 2006-10-16 | 2006-10-16 | Active bi-directional electric power adjuster |
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| CN100563086C CN100563086C (en) | 2009-11-25 |
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