CN101291073B - Uninterrupted power source and control method thereof - Google Patents
Uninterrupted power source and control method thereof Download PDFInfo
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- CN101291073B CN101291073B CN2007100970309A CN200710097030A CN101291073B CN 101291073 B CN101291073 B CN 101291073B CN 2007100970309 A CN2007100970309 A CN 2007100970309A CN 200710097030 A CN200710097030 A CN 200710097030A CN 101291073 B CN101291073 B CN 101291073B
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Abstract
The invention relates to an uninterruptible power supply supplier and a method for controlling the same. The control method comprises following steps: (a) judging whether one of the group selected from a peak voltage of a first AC voltage, a frequency of the first AC voltage, a phase difference between the first AC voltage and a second AC voltage and a combination thereof is abnormal; (b) when judged normal, outputing the first AC voltage to a power supply output end through a bypass return circuit and a transfer switch, and the peak voltage, phase and frequency of the second AC voltage being the same as that of the first AC voltage, when judged abnormal, switching the transfer switch to output the second AC voltage to the power supply output end. Thus, when used in an inductive load or a motor load, the inventive uninterruptible power supply supplier can not generate large surge current to burn the uninterruptible power supply supplier, nor the load is powered off. Meanwhile the power utilization efficiency is improved.
Description
Technical field
The present invention is relevant for a kind of power supply unit and control method thereof, especially relevant for a kind of uninterruptible power supply provider (Uninterruptible Power Supply, UPS) and control method.
Background technology
Along with the fast development of information industry and high-tech industry, most precision electronic device and equipment need rely on high-quality power supply supply and keep normal running.In various supply power modes, uninterruptible power supply provider can also provide high quality power supply except can guaranteeing that power supply can not cut off the power supply, so uninterruptible power supply provider has become a kind of preferred plan that high quality power supply is provided now.Because dissimilar uninterruptible power supply providers has different power supply conversion efficiency, so whole year of uninterruptible power supply provider runs well, can cause required electricity charge increase for example about 10%～30%.
See also Fig. 1, it is the circuit diagram of known uninterruptible power supply provider.As shown in the figure, known uninterruptible power supply provider 1 comprises: AC/DC converter 11, charging circuit 12, battery module 13, DC-DC converter 14, inverter (Inverter) 15, controller 16, static diverter switch (StaticTransfer Switch, S.T.S.) 17 and bypass loop (bypass) 18.Each element function of this traditional uninterruptible power supply provider 1, annexation with and control method be described as follows.
When the civil power Vin of input just often, controller 16 can control AC/DC converters 11 is the direct current with predetermined voltage potential with the AC system voltage transitions of civil power Vin, and this direct current is offered charging circuit 12 and inverter 15.At this moment, controller 16 can be converted to standard and stable alternating current with this direct current by control inverter 15, by static diverter switch 17 output voltage V 1 of inverter 15 is offered load 19 again and use (output voltage V 1 that this moment, load voltage Vout also was inverter 15), charging circuit 12 can be converted to battery module 13 acceptable voltages with the direct voltage of AC/DC converter 11 outputs simultaneously, so that battery module 13 is charged.
When civil power Vin takes place unusually for example to interrupt or problem such as undertension is when causing the electricity consumption bad, controller 16 meeting control DC-DC converters 14 are the direct voltage that inverter 15 needs with the voltage transitions of battery module 13, be converted to alternating current by inverter 15 again, and use for load 19 by static diverter switch 17 power supplies.This moment, load 19 employed electric energy were to be provided by battery module 13, and wherein battery module 13 can be that a plurality of batteries are formed, and number of battery cells is many more can supplying time just of a specified duration more.
At civil power Vin just often, uninterruptible power supply provider 1 can convert the civil power Vin that imports to direct current by AC/DC converter 11 earlier, utilize inverter 15 that dc inverter is become standard and stable alternating current then, by static diverter switch 17 output voltage V 1 of inverter 15 is offered load 19 again and use.Because AC/DC converter 11 and inverter 15 just often can continue to export electric energy at civil power Vin, so the conversion efficiency of AC/DC converter 11 and inverter 15 can influence power consumption efficiency, makes power consumption efficiency reduce.
In order to improve power consumption efficiency, the function mode of another kind of known uninterruptible power supply provider is provided.This function mode is at the civil power Vin of input just often, controller 16 can the static diverter switch 17 of control directly offer load 19 uses with the civil power Vin that imports, just under the situation that Everything is fine, the civil power Vin of input uses for load 19 by bypass loop 18 power supplies.At this moment, inverter 15 equally can be changed alternating current to static diverter switch 17, and the crest voltage of the output voltage V 1 of inverter 15 is fixing rated peak voltage Vp1.Charging circuit 12 can be converted to battery module 13 acceptable voltages with the direct current of AC/DC converter 11 outputs simultaneously, so that battery module 13 is charged.
When the crest voltage of civil power Vin of input or frequency take place when unusual, for example crest voltage increase or reduce rated peak voltage Vp1 ± 10%, or frequency increase or minimizing rated frequency ± 5%, controller 16 can be controlled static diverter switch 17, use (output voltage V 1 that this moment, load voltage Vout also was inverter 15) for load 19 by static diverter switch 17 power supplies the output voltage V 1 of inverter 15, increase power consumption efficiency thus, the uninterruptible power supply provider of this kind control model promptly is called the uninterruptible power supply provider of economical pattern (economic mode, ECO mode).Yet, this kind control mode and structure but can only be used in non-inductive load and non-motor load, if use in inductive load or motor load, when the crest voltage of civil power Vin or the frequency of input takes place unusual, static diverter switch 17 is switched current supply circuit, when using to load 19 output voltage V 1 power supply of inverter 15, if phase difference value between the output voltage V 1 of civil power Vin and inverter 15 is when very big, for example approximately greater than 20 degree, asynchronous conversion can take place and produce burst current (Inrush current) in uninterruptible power supply provider 1, even cause uninterruptible power supply provider to damage, make that uninterruptible power supply provider stops load 19 power supplies are caused load 19 outages.
See also Fig. 2, it shows the oscillogram of the asynchronous conversion of known uninterruptible power supply provider.As shown in the figure, the crest voltage of the civil power Vin that imports when time t1, frequency or phase place take place unusual, and the static diverter switch 17 of controller 16 meeting controls this moment is switched current supply circuit, to give load 19 uses output voltage V 1 power supply of inverter 15.But, phase difference value between the output voltage V 1 of time t1 civil power Vin and inverter 15 is very big, for example approximately greater than 20 degree, make the output voltage V 1 of load voltage Vout and inverter 15 that very big voltage difference be arranged, asynchronous and load 19 is under the situation of inductive load or motor load at this, static diverter switch 17 is switched current supply circuit and will be caused load current Iout that very big burst current is arranged, even cause the uninterruptible power supply provider damage, uninterruptible power supply provider is stopped load 19 power supplies.
Therefore, how developing a kind of uninterruptible power supply provider and control method thereof of improving above-mentioned known technology defective, is the problem of the correlative technology field personnel solution that presses at present.
Summary of the invention
Main purpose of the present invention is to provide a kind of uninterruptible power supply provider and control method thereof, on the one hand, when civil power just often, uninterruptible power supply provider can be powered by bypass loop and be used to load, with the increase power consumption efficiency, and the crest voltage of the output voltage of inverter, phase place and frequency can change along with civil power.On the other hand, when civil power takes place by the unstable initial stage, before the voltage difference that phase difference value caused of the output voltage of civil power and inverter does not become greatly, the output voltage of inverter powered use to load.Therefore, use when inductive load or motor load, can not produce very big burst current, thereby the situation of avoiding uninterruptible power supply provider to burn takes place.
For achieving the above object, the preferred embodiments of the present invention are for providing a kind of control method of uninterruptible power supply provider, and it is applicable to uninterruptible power supply provider, and this uninterruptible power supply provider comprises: power input is used to receive first alternating voltage; Battery module is used for store electrical energy; AC/DC converter is used to receive this first alternating voltage of this power input and be converted to direct voltage; Charging circuit is connected in this AC/DC converter and this battery module, is used for this charging battery module; Inverter is connected in this AC/DC converter and this charging circuit, in order to this direct voltage is converted to second alternating voltage; Bypass loop is connected in this power input; Power output end; Diverter switch is connected in this bypass loop, this inverter and this power output end; And controller, be connected in this power input, this AC/DC converter, this charging circuit and this inverter, be used to control the running of this uninterruptible power supply provider.The control method of this uninterruptible power supply provider comprises step: (a) judge between frequency, this first alternating voltage and this second alternating voltage of the crest voltage be selected from this first alternating voltage, this first alternating voltage phase difference value with and group family that formed of combination whether one of them unusual; And (b) in being judged as just often, this first alternating voltage outputs to this power output end by this bypass loop and this diverter switch, and the crest voltage of this second alternating voltage, phase place and frequency are identical with this first alternating voltage, and be judged as when unusual, switch this diverter switch, so that this second alternating voltage is outputed to this power output end.
The control method of aforesaid uninterruptible power supply provider wherein in this step (b), is being judged as when unusual, and the crest voltage of this second alternating voltage and frequency are adjusted into the rated peak voltage and the rated frequency of this first alternating voltage.
The control method of aforesaid uninterruptible power supply provider, wherein in this step (a), when the specific voltage that increases or reduce the rated peak voltage of this first alternating voltage at the crest voltage of this first alternating voltage changes percentage, judge that this first alternating voltage is for unusual.
The control method of aforesaid uninterruptible power supply provider, wherein this specific voltage variation percentage is ± 10%.
The control method of aforesaid uninterruptible power supply provider, wherein in this step (a), when the characteristic frequency that increases or reduce the rated frequency of this first alternating voltage in the frequency of this first alternating voltage changed percentage, the frequency of judging this first alternating voltage was for unusual.
The control method of aforesaid uninterruptible power supply provider, wherein this characteristic frequency variation percentage is ± 5%.
The control method of aforesaid uninterruptible power supply provider wherein in this step (a), when this phase difference value surpasses the given reference phase difference set point, judges that this phase difference value between this first alternating voltage and this second alternating voltage is unusual.
The control method of aforesaid uninterruptible power supply provider, wherein this given reference phase difference set point is 10 degree.
The control method of aforesaid uninterruptible power supply provider, wherein this uninterruptible power supply provider also comprises DC-DC converter, it is connected in this battery module, this controller and this inverter, is the required voltage of this inverter in order to the voltage transitions with this battery module.
The control method of aforesaid uninterruptible power supply provider, when wherein normal and this battery module electric weight was not enough in this first alternating voltage, this charging circuit was converted to the required voltage of this battery module with this direct voltage, with to this charging battery module.
The control method of aforesaid uninterruptible power supply provider, wherein one of them is formed this diverter switch by being selected from the two carrier crystal pipes of thyristor, triode AC switch, insulated gate, MOS (metal-oxide-semiconductor) transistor and group family that relay constituted.
The control method of aforesaid uninterruptible power supply provider, wherein this first alternating voltage is a civil power, and this power output end is connected in load, and this load be inductive load and motor load one of them.
For achieving the above object, another preferred embodiment of the present invention comprises at least for a kind of uninterruptible power supply provider is provided: battery module, in order to store electrical energy; AC/DC converter is in order to first alternating voltage that receives power input and be converted to direct voltage; Charging circuit, it is connected in this AC/DC converter and this battery module, in order to this charging battery module; Inverter, it is connected in this AC/DC converter and this charging circuit, in order to this direct voltage is converted to second alternating voltage; Bypass loop, it is connected in this power input; Diverter switch, it is connected in this bypass loop, this inverter and power output end; And controller, it is connected in this power input, this AC/DC converter, this charging circuit and this inverter, in order to controlling this uninterruptible power supply provider, thereby make this uninterruptible power supply provider carry out following control program: (a) judge between frequency, this first alternating voltage and this second alternating voltage of the crest voltage that is selected from this first alternating voltage, this first alternating voltage phase difference value with and group family that formed of combination whether one of them unusual; And (b) be judged as just often, this first alternating voltage outputs to this power output end by this bypass loop and this diverter switch, and the crest voltage of this second alternating voltage, phase place and frequency are identical with this first alternating voltage, and be judged as when unusual, switch this diverter switch, so that this second alternating voltage is outputed to this power output end.
Therefore, the present invention uses when inductive load or motor load, can not produce very big burst current and uninterruptible power supply provider is burnt, and the situation that load also can not be cut off the power supply has been improved power consumption efficiency simultaneously.
Fig. 1 is the circuit diagram of known uninterruptible power supply provider.
Fig. 2 is the oscillogram of the asynchronous conversion of known uninterruptible power supply provider.
Description of drawings
Fig. 3 is the circuit diagram of the uninterruptible power supply provider of the preferred embodiment of the present invention.
Fig. 4 is the controlled step flow chart of uninterruptible power supply provider of the present invention.
Fig. 5 is the oscillogram of uninterruptible power supply provider power source conversion of the present invention.
Wherein, description of reference numerals is as follows:
1,3: uninterruptible power supply provider 11,31: AC-DC converter
12,32: charging circuit 13,33: battery module
14,34: DC-to-DC converter 15,35: inverter
16,36: controller 17,37: static diverter switch
18,38: bypass loop 19,39: load
V1: output voltage I1: output current
Vout: load voltage Iout: load current
31a: power input 37a: power output end
31b: dc bus Vin: civil power
S10～S17: the control flow step of uninterruptible power supply provider
Some typical embodiment that embody feature of the present invention and advantage will be described in detail in the explanation of back segment. Be understood that the present invention can have in different schemes various variations, its neither departing from the scope of the present invention, and explanation wherein and the accompanying drawing usefulness that ought explain in itself, but not in order to limit the present invention.
See also Fig. 3, it is the circuit diagram of the uninterrupted power supply supply of the preferred embodiment of the present invention. As shown in Figure 3, uninterrupted power supply supply 3 of the present invention comprises: interchange/direct current transducer 31, charging circuit 32, battery module 33, direct current/direct current transducer 34, inverter 35, controller 36, change-over switch 37, power input 31a, dc bus (DC bus) 31b, power supply output 37a and bypass loop 38. The function of uninterrupted power supply supply 3 each element of the present invention, annexation with and control method be described as follows.
Embodiment
In this embodiment, power input 31a is used to receive civil power Vin, that is first alternating voltage.AC/DC converter 31 is connected between power input 31a and the dc bus 31b, is converted to the direct current with predetermined voltage potential in order to the civil power Vin with power input 31a.Charging circuit 32 is connected between dc bus 31b and the battery module 33, and it is converted to battery module 33 acceptable voltages with the direct voltage of AC/DC converter 31 outputs, so that battery module 33 is charged.DC-DC converter 34 is connected between battery module 33 and the dc bus 31b, is the direct voltage that inverter 35 needs in order to the voltage transitions with battery module 33.Inverter 35 is connected between dc bus 31b and the diverter switch 37, and its direct voltage with dc bus 31b is converted to standard and stable output voltage V 1, that is second alternating voltage.Diverter switch 37 is connected in bypass loop 38, inverter 35 and power output end 37a, can be by for example thyristor (Silicon-Controlled Rectifier, SCR), triode AC switch (The triode AC switch, TRIAC), igbt (Insulated Gate Bipolar Transistor, IGBT), mos field effect transistor (Metal Oxide Semiconductor Field Effect Transistor, MOSFET) or relay form.Bypass loop 38 is connected between diverter switch 37 and the power input 31a, and controller 36 is connected in power input 31a, AC/DC converter 31, charging circuit 32, DC-DC converter 34 and inverter 35, in order to the running of control uninterruptible power supply provider 3.
See also Fig. 4, it shows the controlled step flow chart of uninterruptible power supply provider of the present invention.As shown in Figure 4, its controlled step is as follows:
Step S10: the control program of beginning uninterruptible power supply provider;
Step S11: whether the crest voltage of judging civil power Vin is unusual, if increasing or reduce the specific voltage of rated peak voltage Vp1, the crest voltage of civil power Vin changes percentage in the present embodiment, for example ± 10%, then regard as unusual, if the crest voltage of civil power Vin execution in step S16 unusually then;
Step S12: whether the frequency of judging civil power Vin unusual, changes percentage if the frequency of civil power Vin increases or reduce the characteristic frequency of rated frequency in the present embodiment, for example ± 5%, then regard as unusual, if the frequency anomaly of civil power Vin execution in step S16 then;
Step S13: judge whether the phase difference value between the output voltage V 1 of civil power Vin and inverter 35 is unusual, in the present embodiment if phase difference value is then regarded as unusual greater than for example 10 degree, if the phase difference value between the output voltage V 1 of civil power Vin and inverter 35 is unusual, then execution in step S16;
Step S14: by diverter switch 37 civil power Vin is offered load 39 and use, just by bypass loop 38 civil power Vin is offered load 39 and use, this moment, load voltage Vout also was civil power Vin;
Step S15: with the crest voltage and the phase control of the output voltage V 1 of inverter 35 is identical with civil power Vin, that is to say, the crest voltage of the output voltage V 1 of inverter 35 and phase place can change along with civil power Vin, in certain embodiments, the frequency of the output voltage V 1 of inverter 35 is the frequency of civil power Vin, makes the frequency of output voltage V 1 of inverter 35 equally can change along with civil power Vin.Then, continue to get back to step S11;
Step S16: by diverter switch 37 output voltage V 1 of inverter 35 is offered load 39 and use, this moment, load voltage Vout also was the output voltage V 1 of inverter 35;
Step S17: the crest voltage of the output voltage V 1 of inverter 35 is adjusted into rated peak voltage Vp1, also the frequency of the output voltage V 1 of inverter 35 can be adjusted into rated frequency in certain embodiments.Then, continue to get back to step S11.
Because above-mentioned control flow step can continue to carry out, thereby make the power supply that uninterruptible power supply provider can be stable use for load 39.Certainly, in other embodiments, the front and back of step S11～step S13 order can be adjusted variation, is not limited.
Fig. 5 shows the oscillogram of uninterruptible power supply provider power source conversion of the present invention.As Fig. 3 and shown in Figure 5, civil power Vin before time t2 (that is first alternating voltage) normal power supply, controller 36 can control its switch 37 directly offer load 39 uses with civil power Vin, just by bypass loop 38 civil power Vin is offered load 39 and uses.Simultaneously, AC/DC converter 31 can be converted to direct voltage with civil power Vin, utilizing inverter 35 then is stable output voltage V 1 (that is second alternating voltage) with this direct voltage inversion, in certain embodiments, the output voltage V 1 of inverter 35 is identical with the frequency of civil power Vin, make the frequency of output voltage V 1 of inverter 35 change along with civil power Vin, in addition, controller 36 meeting control inverters 35, make the crest voltage and the phase place of output voltage V 1 of inverter 35 identical with civil power Vin, that is to say that the crest voltage of inverter 35 output voltage V 1 and phase place can change along with civil power Vin.At this moment, if battery module 33 electric weight deficiencies, charging circuit 32 can be converted to battery module 33 acceptable voltages with the direct voltage of AC/DC converter 31 outputs, so that battery module 33 is charged.
In this embodiment, though still in running, load 39 is directly to be powered by civil power Vin to inverter 35, the output current I1 of inverter 35 is zero ampere (A), just understand consumed power when therefore whole uninterruptible power supply provider 3 has only battery module 33 chargings, so power consumption efficiency is quite high.
Please consult Fig. 3 and Fig. 5 again, the crest voltage of civil power Vin before time t2 (that is first alternating voltage) maintains rated peak voltage Vp1, but the crest voltage at time t2 civil power Vin diminishes, become the second crest voltage Vp2 by rated peak voltage Vp1, and too fast variation takes place in phase place and frequency, makes that the output voltage V 1 (that is second alternating voltage) of inverter 35 can't be synchronous with civil power Vin.Yet, because phase place and the frequency of civil power Vin change fast, cause between the output voltage V 1 of civil power Vin and inverter 35 phase difference value is arranged, so the first phase difference value d1 is arranged between the output voltage V 1 of time t2 civil power Vin and inverter 35, along with civil power Vin continues unstable, phase difference value increases along with the time and becomes big, so the second phase difference value d2 between the output voltage V 1 of time t3 civil power Vin and inverter 35 surpasses the given reference phase difference set point for example 10 when spending, controller 36 can control its switch 37 switch current supply circuit, use to load 39 output voltage V 1 power supply of inverter 35.
Because the crest voltage of the output voltage V 1 of inverter 35 is along with civil power Vin changes, in certain embodiments, the frequency of the output voltage V 1 of inverter 35 also can be along with civil power Vin changes, so voltage difference between the output voltage V 1 of time t3 civil power Vin and inverter 35, the second phase difference value d2 causes exactly, controller 35 can utilize the voltage difference between the output voltage V 1 of civil power Vin and inverter 35, judge whether civil power Vin has unsettled situation to take place, before phase difference value between the output voltage V 1 of civil power Vin and inverter 35 becomes greatly, control its switch 37 is switched current supply circuit, uses to load 39 output voltage V 1 power supply of inverter 35.At this moment, it is little that the second phase difference value d2 causes the voltage difference between the output voltage V 1 of civil power Vin and inverter 35.Though load 39 is inductive load or motor load, when time t3 diverter switch 37 switching current supply circuits use for load 39 so that the output voltage V 1 of inverter 35 is powered, the output current I1 of load current Iout and inverter 35 can not produce very big burst current, so the situation that load 39 also can not be cut off the power supply takes place in the situation that uninterruptible power supply provider 3 is burnt.
After switching current supply circuit, just after the time t3, controller 36 can control inverters 35 be adjusted into rated peak voltage Vp1 with the crest voltage of output voltage V 1, also the frequency of the output voltage V 1 of inverter 35 can be adjusted into rated frequency in certain embodiments.At this moment, the crest voltage of load voltage Vout and frequency are the rated peak voltage Vp1 and the rated frequencies of standard.Even when civil power Vin interrupts, DC-DC converter 34 can be the direct voltage that inverter 35 needs with the voltage transitions of battery module 33, makes uninterruptible power supply provider 3 stable power-supplyings of the present invention give load 39.In certain embodiments, battery module 33 can be made up of a plurality of batteries, and number of battery cells is many more can supplying time just of a specified duration more.Certainly, in other embodiments, uninterruptible power supply provider can not have DC-DC converter, in this structure, the battery module of uninterruptible power supply provider can be directly connected on the dc bus, and whether supplies power to (not shown) on the dc bus by switch element control battery module.
Another kind of situation is to have only the crest voltage of civil power Vin to reduce or rising, reduce or be elevated to load 39 unacceptable voltages, originally execute in the example for reduce or rising rated peak voltage Vp1 for example about ± 10%, this moment, controller 36 meeting control its switch 37 were switched current supply circuits, use to load 39 output voltage V 1 power supply of inverter 35.After switching current supply circuit, controller 36 equally can control inverter 35 be adjusted into rated peak voltage Vp1 with the crest voltage of output voltage V 1, also the frequency of the output voltage V 1 of inverter 35 can be adjusted into rated frequency in certain embodiments.Because the crest voltage of the output voltage V 1 of inverter 35 is along with civil power Vin changes, and the frequency of the output voltage V 1 of inverter 35 also can be along with civil power Vin changes in certain embodiments, so the voltage difference between the output voltage V 1 of civil power Vin and inverter 35 is relative little, though load 39 is inductive load or motor load, switch current supply circuit in diverter switch 37, when using for load 39 so that the output voltage V 1 of inverter 35 is powered, the output current I1 of load current Iout and inverter 35 can not produce very big burst current, so do not have the situation generation that uninterruptible power supply provider 3 burns, the situation that load 39 also can not be cut off the power supply.
Similarly, after after a while, the crest voltage of civil power Vin get back to normal after, the output voltage V 1 of inverter 35 can be synchronous with civil power Vin, just phase difference is zero, crest voltage and frequency are identical, as the waveform shown in after the time t4 among Fig. 5.At this moment, controller 36 can control its switch 37 offer load 39 uses with civil power Vin by bypass loop 38.
In sum, uninterruptible power supply provider of the present invention and control method thereof are at civil power Vin just often, uninterruptible power supply provider uses for load 39 by bypass loop 38 power supplies, to increase power consumption efficiency, the crest voltage of the output voltage V 1 of inverter 35 and phase place or frequency are then along with civil power Vin changes.When civil power Vin takes place by the unsettled initial stage, the output voltage V 1 of civil power Vin and inverter 35 is understood asynchronous and is produced phase difference value, before the voltage difference that this phase difference value causes does not become greatly, controller 36 can control its switch 37 switch current supply circuit, use to load 39 output voltage V 1 power supply of inverter 35.Therefore, use when inductive load or motor load, can not produce very big burst current and uninterruptible power supply provider is burnt, the situation that load also can not be cut off the power supply has been improved power consumption efficiency simultaneously.
The present invention can carry out various modifications by those skilled in the art, but does not break away from claims scope required for protection.
Claims (13)
1. the control method of a uninterruptible power supply provider, it is applicable to uninterruptible power supply provider, this uninterruptible power supply provider comprises: power input is used to receive first alternating voltage; Battery module is used for store electrical energy; AC/DC converter is used to receive this first alternating voltage of this power input and be converted to direct voltage; Charging circuit is connected in this AC/DC converter and this battery module, is used for this charging battery module; Inverter is connected in this AC/DC converter and this charging circuit, in order to this direct voltage is converted to second alternating voltage; Bypass loop is connected in this power input; Power output end; Diverter switch is connected in this bypass loop, this inverter and this power output end; And controller, be connected in this power input, this AC/DC converter, this charging circuit and this inverter, be used to control the running of this uninterruptible power supply provider; The control method of this uninterruptible power supply provider comprises step:
(a) judge between frequency, this first alternating voltage and this second alternating voltage of the crest voltage be selected from this first alternating voltage, this first alternating voltage phase difference value with and group family that formed of combination whether one of them unusual; And
(b) be judged as just often, this first alternating voltage outputs to this power output end by this bypass loop and this diverter switch, and the crest voltage of this second alternating voltage, phase place and frequency are identical with this first alternating voltage, and be judged as when unusual, switch this diverter switch, so that this second alternating voltage is outputed to this power output end.
2. the control method of uninterruptible power supply provider as claimed in claim 1 wherein in this step (b), is being judged as when unusual, and the crest voltage of this second alternating voltage and frequency are adjusted into the rated peak voltage and the rated frequency of this first alternating voltage.
3. the control method of uninterruptible power supply provider as claimed in claim 1, wherein in this step (a), when the specific voltage that increases or reduce the rated peak voltage of this first alternating voltage at the crest voltage of this first alternating voltage changes percentage, judge that this first alternating voltage is for unusual.
4. the control method of uninterruptible power supply provider as claimed in claim 3, wherein to change percentage be ± 10% to this specific voltage.
5. the control method of uninterruptible power supply provider as claimed in claim 1, wherein in this step (a), when the characteristic frequency that increases or reduce the rated frequency of this first alternating voltage in the frequency of this first alternating voltage changed percentage, the frequency of judging this first alternating voltage was for unusual.
6. the control method of uninterruptible power supply provider as claimed in claim 5, wherein to change percentage be ± 5% to this characteristic frequency.
7. the control method of uninterruptible power supply provider as claimed in claim 1 wherein in this step (a), when this phase difference value surpasses the given reference phase difference set point, judges that this phase difference value between this first alternating voltage and this second alternating voltage is unusual.
8. the control method of uninterruptible power supply provider as claimed in claim 7, wherein this given reference phase difference set point is 10 degree.
9. the control method of uninterruptible power supply provider as claimed in claim 1, wherein this uninterruptible power supply provider also comprises DC-DC converter, it is connected in this battery module, this controller and this inverter, is the required voltage of this inverter in order to the voltage transitions with this battery module.
10. the control method of uninterruptible power supply provider as claimed in claim 1, when wherein normal and this battery module electric weight is not enough in this first alternating voltage, this charging circuit is converted to the required voltage of this battery module with this direct voltage, with to this charging battery module.
11. the control method of uninterruptible power supply provider as claimed in claim 1, wherein one of them is formed this diverter switch by being selected from group family that thyristor, triode AC switch, insulated gate two carrier crystal pipe, mos field effect transistor and relays are constituted.
12. the control method of uninterruptible power supply provider as claimed in claim 1, wherein this first alternating voltage is a civil power, and this power output end is connected in load, and this load be inductive load and motor load one of them.
13. a uninterruptible power supply provider comprises at least:
Battery module is in order to store electrical energy;
AC/DC converter is in order to first alternating voltage that receives power input and be converted to direct voltage;
Charging circuit, it is connected in this AC/DC converter and this battery module, in order to this charging battery module;
Inverter, it is connected in this AC/DC converter and this charging circuit, in order to this direct voltage is converted to second alternating voltage;
Bypass loop, it is connected in this power input;
Diverter switch, it is connected in this bypass loop, this inverter and power output end; And
Controller, it is connected in this power input, this AC/DC converter, this charging circuit and this inverter, in order to controlling this uninterruptible power supply provider, thereby makes this uninterruptible power supply provider carry out following control program:
(a) judge between frequency, this first alternating voltage and this second alternating voltage of the crest voltage be selected from this first alternating voltage, this first alternating voltage phase difference value with and group family that formed of combination whether one of them unusual; And
(b) be judged as just often, this first alternating voltage outputs to this power output end by this bypass loop and this diverter switch, and the crest voltage of this second alternating voltage, phase place and frequency are identical with this first alternating voltage, and be judged as when unusual, switch this diverter switch, so that this second alternating voltage is outputed to this power output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100970309A CN101291073B (en) | 2007-04-17 | 2007-04-17 | Uninterrupted power source and control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100970309A CN101291073B (en) | 2007-04-17 | 2007-04-17 | Uninterrupted power source and control method thereof |
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| Publication Number | Publication Date |
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| CN101291073A CN101291073A (en) | 2008-10-22 |
| CN101291073B true CN101291073B (en) | 2011-05-04 |
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| CN2007100970309A Active CN101291073B (en) | 2007-04-17 | 2007-04-17 | Uninterrupted power source and control method thereof |
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| CN102856907A (en) * | 2011-06-29 | 2013-01-02 | 尹千泳 | Alternating voltage phase synchronization circuit |
| KR101882800B1 (en) | 2012-02-28 | 2018-08-01 | 삼성전자주식회사 | Wireless power receiver and method for controlling thereof |
| CN103390929B (en) * | 2012-05-07 | 2017-07-21 | 力博特公司 | The adaptive output voltage control system of uninterrupted power source |
| CN104320896B (en) * | 2014-11-23 | 2017-01-04 | 向红 | Can the lighting lamp circuit of uninterrupted power supply and illuminating lamp thereof |
| CN105244994A (en) * | 2015-10-12 | 2016-01-13 | 北京广大泰祥自动化技术有限公司 | Power switch and standby control power supply system for internal control devices of power switch |
| KR20180134993A (en) * | 2016-04-21 | 2018-12-19 | 도시바 미쓰비시덴키 산교시스템 가부시키가이샤 | Uninterruptible power supply |
| US10637279B2 (en) * | 2017-02-22 | 2020-04-28 | Vertiv Corporation | Method of mitigating effects of AC input voltage surge in a transformer-less rectifier uninterruptible power supply system |
| CN107907763B (en) * | 2017-11-10 | 2020-05-08 | 江苏固德威电源科技股份有限公司 | Rapid off-grid detection method for energy storage inverter |
| CN108429336A (en) * | 2018-04-02 | 2018-08-21 | 郑州云海信息技术有限公司 | A kind of data center and its method of supplying power to |
| JP6732837B2 (en) * | 2018-04-27 | 2020-07-29 | 矢崎総業株式会社 | Power redundancy system |
| CN110858727A (en) * | 2018-08-24 | 2020-03-03 | 台达电子工业股份有限公司 | Uninterruptible power supply and operation method thereof |
| CN111009957B (en) * | 2019-12-09 | 2021-12-07 | 深圳供电局有限公司 | Parallel uninterrupted power supply |
| CN112673543B (en) * | 2020-05-15 | 2023-12-29 | 华为数字能源技术有限公司 | Uninterruptible power supply system and driving method thereof |
| CN111900793A (en) * | 2020-08-21 | 2020-11-06 | 上海联影医疗科技有限公司 | Power supply system, medical system and control method |
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