CN205319794U - Uninterruptible power supply system - Google Patents
Uninterruptible power supply system Download PDFInfo
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- CN205319794U CN205319794U CN201521144565.3U CN201521144565U CN205319794U CN 205319794 U CN205319794 U CN 205319794U CN 201521144565 U CN201521144565 U CN 201521144565U CN 205319794 U CN205319794 U CN 205319794U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/40—Arrangements for reducing harmonics
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Abstract
The utility model provides an uninterruptible power supply system, includes fuel generator, energy storage contravariant system, controllable switch, observation circuit and reactor, the observation circuit is used for just often exporting first monitor signal at the commercial power, output second monitor signal when the commercial power is unusual, controllable switch is used for under the control of first monitor signal closedly, is supplied power to the load through the reactor by the commercial power, energy storage contravariant system is arranged in when a controllable switch is closed exporting harmonic and reactive compensation electric current in order to carry out harmonic and reactive compensation according to load current's harmonic and reactive component, controllable switch still is used for disconnection under the control of second monitor signal, the fuel generator is used for starting working when controllable switch breaks off, is behind the electric energy output with oil -fired thermal energy conversion and gives energy storage contravariant system, energy storage contravariant system is used for still that the power output supplies power to the load when controllable switch breaks off. Above -mentioned uninterruptible power supply system the stable better and efficiency index is higher.
Description
Technical field
This utility model relates to power technique fields, particularly relates to a kind of fuel electric generator formula uninterruptible power system.
Background technology
Often can there are quality problems in the power supply provided by civil power, and have the possibility of power failure at any time. Huge economic loss can be caused in the fields such as quasiconductor, data center, aviation, telecommunications, processing industry by power outage. Therefore, for highly important field, power supply just seems particularly significant reliably continuously. And how to improve the quality to important facility power and reliability is also the huge challenge faced at present.
Traditional on-Line UPS system (UninterruptiblePowerSystem based on double; two converter techniques, UPS) for ensureing the uninterrupted power supply of visual plant, constantly to pass through commutator and inverter converting electrical energy, therefore the fault of points of common connection (PCC point) is easily caused, and produce unnecessary power consumption under strong grid condition, be not suitable for the uninterrupted power supply requirement to high electric power safeguard field.
Utility model content
Based on this, it is necessary to provide the uninterruptible power system that a kind of stability is better and energy efficiency index is higher.
A kind of uninterruptible power system, including fuel electric generator, energy storage inversion system, gate-controlled switch, observation circuit and reactor; Described fuel electric generator is connected with described energy storage inversion system; Described energy storage inversion system is connected with load, described reactor respectively by points of common connection; Described gate-controlled switch one end electrically connects with city, and the other end is connected with described reactor; Described observation circuit is connected with civil power, described gate-controlled switch respectively; Described observation circuit is for being monitored the power supply state of civil power, and exports the first monitor signal when civil power is normal, exports the second monitor signal when city's electrical anomaly; Described gate-controlled switch, for closing under the control of described first monitor signal, is powered to the load through described reactor by civil power;Described energy storage inversion system for when described first gate-controlled switch Guan Bi according to the harmonic wave in load current and idle component output harmonic wave and reactive-load compensation electric current to carry out harmonics and reactive compensation; Described gate-controlled switch is additionally operable under the control of described second monitor signal to disconnect; Described fuel electric generator, for starting working when described gate-controlled switch disconnects, exports to described energy storage inversion system after the heat energy of fuel oil is converted to electric energy; Described energy storage inversion system is additionally operable to the output electric energy when described gate-controlled switch disconnects and powers to the load.
Wherein in an embodiment, described fuel electric generator includes diesel-driven generator.
Wherein in an embodiment, described energy storage inversion system includes commutator, inverter, accumulator and charger; The input of described commutator is connected with the outfan of described fuel electric generator; The outfan of described commutator is connected with the first direct-flow input end of described inverter; The outfan of described inverter is connected with described points of common connection; The input of described accumulator is connected with the outfan of described charger; The outfan of described accumulator is connected with the second direct-flow input end of described inverter; The input of described charger is connected with described points of common connection.
Wherein in an embodiment, described charger is for being monitored the dump energy of described accumulator, and via described charger, described accumulator is charged by civil power when the dump energy of described accumulator is lower than threshold power.
Wherein in an embodiment, described inverter includes harmonic and reactive currents and extracts circuit; Described harmonic and reactive currents extracts FFT module, filter module, adder and the inverse FFT module that circuit includes being sequentially connected with; The input of described FFT module is connected with described points of common connection; Described FFT module is for being frequency domain by described load current from spatial transform, and is each harmonic in load current DC component, load current fundametal compoment and load current and idle component by described load current at frequency domain decomposition; Described filter module is used for filtering described load current DC component and described load current fundametal compoment, and each harmonic in filtered load current and idle component is exported to described adder; Described adder obtains frequency domain harmonic and reactive-current compensation command value for each harmonic in described load current and idle component are carried out addition; Described inverse FFT module for being converted to time harmonic and reactive-current compensation command value by described frequency domain harmonic and reactive-current compensation command value; Described accumulator is additionally operable to according to the harmonic and reactive currents compensating instruction value that extracts, the DC side of described inverter be powered, so that described inverter exports corresponding harmonics and reactive compensation electric current to points of common connection.
Wherein in an embodiment, described filter module is high pass filter block.
Wherein in an embodiment, described energy storage inversion system also includes switching switch; The first input end of described switching switch is connected with the outfan of described commutator; Second input of described switching switch is connected with the outfan of described accumulator; The outfan of described switching switch is connected with the DC side input of described inverter; Described switching switchs for being devoted oneself to work at city's electrical anomaly and described fuel electric generator, the direct-flow input end of described first input end with described inverter is connected when the alternating current that described fuel electric generator exports is converted to galvanic current, otherwise is connected with the direct-flow input end of described inverter by described second input by described commutator.
Wherein in an embodiment, also include by-pass switch;Described by-pass switch is connected with civil power, load respectively; Described by-pass switch is for turning on thus directly being powered to the load by civil power when described uninterruptible power system needs to keep in repair.
Above-mentioned uninterruptible power system, gate-controlled switch closes when civil power is normal, thus being powered to the load via after reactor by civil power; Energy storage inversion system and electrical network parallel running simultaneously, and according to the harmonic wave in load current and idle component, points of common connection is carried out harmonics and reactive compensation, thus the PCC point quality of power supply is improved, to improve the energy efficiency indexes of electrical network and to guarantee that the high-quality of load is powered. When city's electrical anomaly, gate-controlled switch disconnects, and fuel electric generator is started working and generated electricity, so that energy storage inversion system can to load supplying, guaranteeing that load still is able to normal operation when city's electrical anomaly, stability is better, it is possible to meet the power demands of load continuous work.
Accompanying drawing explanation
Fig. 1 is the circuit block diagram of the uninterruptible power system in an embodiment;
Fig. 2 is the theory diagram that the harmonic and reactive currents in the inverter in Fig. 1 extracts circuit;
Fig. 3 is the schematic diagram that the quality of power supply of PCC point is improved when being incorporated into the power networks with electrical network by uninterruptible power system in Fig. 1;
Fig. 4 be uninterruptible power system in Fig. 1 from grid-connected to off-network seamless switching time effect schematic diagram.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, this utility model is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain this utility model, be not used to limit this utility model.
Fig. 1 is the circuit block diagram of the uninterruptible power system in an embodiment, and this uninterruptible power system includes observation circuit (not shown), gate-controlled switch 110, reactor 120, energy storage inversion system 130 and fuel electric generator 140. Wherein, one end of gate-controlled switch 110 electrically connects with city, and the other end is connected with reactor 120. The other end of reactor 120 is connected with points of common connection PCC. Fuel electric generator 140 is connected with energy storage inversion system 130, and energy storage inversion system 140 is connected with load also by points of common connection PCC.
Observation circuit is connected with the control end of civil power and gate-controlled switch 110 respectively. Observation circuit is for being monitored the power supply state of civil power. Specifically, observation circuit exports the first monitor signal when monitoring out civil power and being normal, exports the second monitor signal when city's electrical anomaly. The monitor signal generated is exported the control end to gate-controlled switch 110 by observation circuit, thus the break-make of gate-controlled switch 110 is controlled. Wherein, the first monitor signal is used for controlling gate-controlled switch 110 and closes, and the second monitor signal is used for controlling gate-controlled switch 110 and disconnects. In the present embodiment, civil power is just referring to the voltage of civil power and is being in steady statue, sharply change (in the short time, voltage has bigger lifting or decline) will not occur and can normally export and be powered to load; City's electrical anomaly then refers to that the voltage of civil power plays pendulum or interrupts (namely can not normally export powering load) state.
The end that controls of gate-controlled switch 110 is used for receiving the monitor signal of observation circuit output, and carries out closing or turning under the control of the monitor signal received. Therefore, gate-controlled switch 110 has Guan Bi and turns off two states, so that there is two corresponding mode of operations, i.e. civil power mode of operation (or grid-connected mode of operation) and fuel electric generator mode of operation (or off-network mode of operation) in uninterruptible power system.Specifically, gate-controlled switch 110 is (namely when civil power is normal) Guan Bi under the control of the first monitor signal, and uninterruptible power system enters civil power mode of operation. Gate-controlled switch 110 under the control of the second monitor signal (namely during city's electrical anomaly) turns off, and uninterruptible power system enters fuel electric generator mode of operation.
When gate-controlled switch 110 closes, civil power is via exporting powering load after reactor 120. Reactor 120 is for leaving civil power and load isolation, it is ensured that the sineization of grid side electric current. In the present embodiment, reactor 120 is inductance element.
When gate-controlled switch 110 closes, energy storage inversion system 130 is for according to load current iloadIn harmonic wave and idle component output harmonic wave and reactive-load compensation electric current to carry out harmonics and reactive compensation, thus improving the quality of power supply of points of common connection PCC, and then improve the power supply quality of load. Energy storage inversion system 130 includes commutator 132, inverter 134, accumulator 136 and charger 138. Wherein, the input of commutator 132 is connected with the outfan of fuel electric generator 140, and the outfan of commutator 132 is connected with the first direct-flow input end of inverter 134. The outfan of inverter 134 is connected with load, reactor 120 by points of common connection PCC. The input of charger 138 is connected with points of common connection PCC, and the outfan of charger 138 is connected with the input of accumulator 136. The outfan of accumulator 136 is connected with the second direct-flow input end of inverter 134. When gate-controlled switch 110 closes, inverter 134 and electrical network parallel running, accumulator 136 provide DC source to the DC side of inverter 134. Inverter 134 is according to load current iloadIn harmonic wave and idle component output harmonic wave and reactive-load compensation electric current, points of common connection PCC is carried out harmonics and reactive compensation, improves the power supply quality of load.
Inverter 134 includes harmonic and reactive currents and extracts circuit. Fig. 2 is the theory diagram that the harmonic and reactive currents in an embodiment extracts circuit. Referring to Fig. 2, harmonic and reactive currents extracts FFT (FastFourierTransform, fast fourier transform) module 210, filter module 220, adder 230 and the inverse FFT module 240 that circuit includes being sequentially connected with. The input of FFT module 210 is connected with points of common connection PCC. FFT module 210 is used for receiving load current iloadAnd by load current iloadFrequency domain is become from time domain, and by load current iload(load current iloadGenerally can by DC quantity Iloaddc, first-harmonic amount Iload1thWith each harmonic and idle amount Iloadnth(n >=2) sum forms) it is load current DC component I at frequency domain decompositionloaddc, load current fundametal compoment Iload1th, load current 2 subharmonic and idle component Iload2th... load current nth harmonic and idle component Iloadnth, it may be assumed that
iload=Iloaddc+Iload1th+Iload2th+……+Iloadnth。
Load current iloadEach component after decomposition is filtered processing again through filter module 220. In the present embodiment, filter module 220 is high pass filter. Filter module 220 is used for filtering load current iloadIn load current DC component IloaddcWith load current fundametal compoment Iload1th, and by filtered load current iloadIn each harmonic and idle component export to adder 230. Adder 230 obtains after each harmonic and idle component are added from load current iloadThe frequency domain harmonic extracted and reactive-current compensation command value Iloadh, it may be assumed that
Iloadh=Iload2th+……+Iloadnth。
Adder 230 optionally can be added according to the demand of the power supply quality each harmonic to input and idle component, is all added without to all each harmonics and idle component.Such as, adder 230 as required only to the harmonic wave within 30 times with idle component is added or the harmonic wave within 50 times and idle component are added, thus having higher degree of freedom, and then can reduce the workload of adder 230. Inverse FFT module 240 is for frequency domain harmonic adder 230 exported and reactive-current compensation command value IloadhBe converted to time harmonic and reactive-current compensation command value iinvh. Accumulator 136 is for according to the harmonic and reactive currents compensating instruction value i extractedinvhThe DC side of inverter 134 is powered, and finally, inverter 134 has only to-iinvhIt is injected into electrical network and the load current i of points of common connection PCCloadIn harmonic and reactive currents component offset, and then realize can realize PCC point load current iloadEffect with the power network current sine of PCC point, unity power factor. Inverter 134 is according to load current iloadIn harmonic wave and the idle component idle and harmonic compensation current of output improve with the quality of power supply to PCC point place, thus offsetting PCC point load current iloadIn idle and harmonic, finally make mains current containing only there being real component, it is thus eliminated that idle and harmonic wave Current on Grid harm, it is possible to the quality of power supply of points of common connection PCC to be improved preferably, and then improves the energy efficiency index of electrical network.
In the present embodiment, charger 138 is for being monitored the dump energy of accumulator 136, and via charger 138, accumulator 136 is charged by civil power when dump energy is lower than threshold power, with the energy loss of supplementary accumulator 136. When gate-controlled switch 110 normally closed, namely when load is carried out normal power supply by civil power, fuel electric generator 140 does not work.
Schematic diagram when Fig. 3 is uninterruptible power system and electrical network parallel running, the quality of power supply of PCC point improved. At t0Before moment, uninterruptible power system is not connected to the grid, by civil power powering load, load current iloadEqual to mains current igrid, i.e. iload=igrid. Load current i simultaneouslyloadIn containing harmonic wave and idle, wave distortion is serious, it is necessary to compensate. At t0In the moment, uninterruptible power system puts into and electrical network parallel running, and PCC point is carried out harmonics and reactive compensation by inverter 134 output harmonic wave and reactive-load compensation electric current, counteracts load current iloadIn harmonic wave and idle component. After compensation, the load current i of PCC pointloadWaveform becomes pure sinusoid, therefore well completes the function that the quality of power supply is improved.
Gate-controlled switch 110 disconnects when city's electrical anomaly, and uninterruptible power system enters fuel electric generator mode of operation, and inverter 134 switches seamlessly to off-network operational mode from grid-connect mode. Specifically, fuel electric generator 140 is started working, and exports to energy storage inversion system 130 after the heat energy of fuel oil is converted to electric energy. Energy storage inversion system 130 then exports electric energy and powers to the load, to guarantee that load can continue non-stop run. In the present embodiment, fuel electric generator 140 is diesel-driven generator. As long as fuel electric generator 140 provides enough fuel oils to get final product uninterrupted outside output electric energy, so that it is guaranteed that load is carried out uninterrupted power supply during city's electrical anomaly, meet the uninterrupted power supply requirement of the load in the especially high electric power safeguard field of load.
When fuel electric generator 140 has just started and during output voltage instability, the DC side of inverter 134 is powered by accumulator 136; When the output voltage stabilization of fuel electric generator 140, the alternating current that fuel electric generator 140 sends is converted to and exports the DC side to inverter 134 as DC source after unidirectional current and power by rectified device 132, it is ensured that the uninterrupted power supply of load.Now accumulator 136 is no longer powered to the DC side of inverter 134. In one embodiment, energy storage inversion system 130 also includes switching switch. The first input end of switching switch is connected with the outfan of commutator 132, and the second input of switching switch is connected with the outfan of accumulator 136, and the outfan of switching switch is then connected with the direct-flow input end of inverter 134. The direct-flow input end of first input end with inverter 134 is connected by switching switch for when the output voltage stabilization of commutator 132 (namely during fuel electric generator 140 stable operation), otherwise is then connected by the direct-flow input end of the second input with inverter 134.
Fig. 4 be uninterruptible power system from grid-connected to off-network seamless switching time effect schematic diagram. At t0Before moment, uninterruptible power system is incorporated into the power networks, by civil power powering load, load current iloadNo better than mains current igrid, the watt current i of inverter 134 output simultaneouslyinvOnly small, general watt current iinvIt is the energy of inverter 134 own loss, it is also possible to be that charger 138 is to the charging current of accumulator 136, i.e. IBat=-iinv. At t0In the moment, uninterruptible power system is switched to off-network pattern from grid-connect mode, and mains current is zero, and inverter 134 is switched to inversion duty, first by accumulator 136 through inverter 134 powering load, now load current iloadIt is equal to the output electric current i of inverter 134inv, i.e. iload=iinv=IBat, start fuel electric generator 140 simultaneously. At t1Moment, fuel electric generator 140 starts complete and output voltage stabilization, the DC side of inverter 134 is powered and is switched to fuel electric generator 140 power supply mode by accumulator 136, namely the convert alternating current that fuel electric generator 132 (for diesel-driven generator in the present embodiment) sends is become unidirectional current to power as DC source to the DC side of inverter 134 by rectified device 132, now load current iloadIt is equal to the electric current i of fuel electric generator 140 outputDG, i.e. iload=iinv=iDG。
Further, when line voltage recovers normal, gate-controlled switch 110 closes, by civil power powering load. Meanwhile, inverter 134 again with electrical network parallel running, and according to load current iloadIn harmonic wave and idle component output harmonic wave and reactive-load compensation electric current, points of common connection PCC is carried out harmonics and reactive compensation, improves the power supply quality of load.
Above-mentioned uninterruptible power system, gate-controlled switch 110 closes when mains-supplied is normal, thus being powered to the load via after reactor 120 by civil power; Energy storage inversion system 130 and electrical network parallel running simultaneously, according to load current iloadIn harmonic wave and idle component points of common connection PCC is carried out harmonics and reactive compensation, thus the PCC point quality of power supply is improved, with improve power supply energy efficiency indexes and guarantee that the high-quality of load is powered. When city's electrical anomaly, gate-controlled switch 110 disconnects, and fuel electric generator 140 is started working and generated electricity, so that energy storage inversion system 130 can to load supplying, guaranteeing that load still is able to normal operation when city's electrical anomaly, stability is better, it is possible to meet the power demands of load continuous work.
Referring to Fig. 1, the uninterruptible power system in the present embodiment also includes by-pass switch 150. By-pass switch 150 is connected between load and civil power, for the conducting when uninterruptible power system needs to keep in repair thus directly being powered to the load by civil power, it is ensured that during uninterruptible power system exception, load still is able to normal operation.
Above-mentioned uninterruptible power system, has civil power and two kinds of mode of operations of fuel electric generator. When civil power is normal and electrical network parallel running, and according to the harmonic wave in load current and idle component, PCC point is carried out harmonics and reactive compensation, make the quality of power supply of PCC point civil power reach unity power factor, ensure that the high-quality of important load is powered; Switch seamlessly to fuel electric generator mode of operation when city's electrical anomaly, starting fuel electric generator 140 provides DC source to inverter 134, by inverter 134 powering load, it is ensured that load continuous is powered. Above-mentioned uninterruptible power system, it is not necessary to the advantage that can reach improve civil power quality electrically coupled in series with city, improves efficiency significantly, consumes energy minimum under strong grid condition. And whole system may be mounted at open air, saving space, installation cost is cheap, saves operating power consumption, does not use air conditioning system, do not use environmentally hazardous battery, it is not necessary to paying the great expense etc. changing battery, reliability is higher. Above-mentioned uninterruptible power system is applicable to industrial park, large-scale industry automatic assembly line, the contour power supply guarantee unit of high-density data center, to meet it to high-power or super large power load power demands.
Each technical characteristic of embodiment described above can combine arbitrarily, for making description succinct, the all possible combination of each technical characteristic in above-described embodiment is not all described, but, as long as the combination of these technical characteristics is absent from contradiction, all it is considered to be the scope that this specification is recorded.
Embodiment described above only have expressed several embodiments of the present utility model, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to utility model patent scope. It should be pointed out that, for the person of ordinary skill of the art, without departing from the concept of the premise utility, it is also possible to make some deformation and improvement, these broadly fall into protection domain of the present utility model. Therefore, the protection domain of this utility model patent should be as the criterion with claims.
Claims (8)
1. a uninterruptible power system, it is characterised in that include fuel electric generator, energy storage inversion system, gate-controlled switch, observation circuit and reactor; Described fuel electric generator is connected with described energy storage inversion system; Described energy storage inversion system is connected with load, described reactor respectively by points of common connection; Described gate-controlled switch one end electrically connects with city, and the other end is connected with described reactor; Described observation circuit is connected with civil power, described gate-controlled switch respectively;
Described observation circuit is for being monitored the power supply state of civil power, and exports the first monitor signal when civil power is normal, exports the second monitor signal when city's electrical anomaly;
Described gate-controlled switch, for closing under the control of described first monitor signal, is powered to the load through described reactor by civil power; Described energy storage inversion system for when described first gate-controlled switch Guan Bi according to the harmonic wave in load current and idle component output harmonic wave and reactive-load compensation electric current to carry out harmonics and reactive compensation;
Described gate-controlled switch is additionally operable under the control of described second monitor signal to disconnect; Described fuel electric generator, for starting working when described gate-controlled switch disconnects, exports to described energy storage inversion system after the heat energy of fuel oil is converted to electric energy; Described energy storage inversion system is additionally operable to the output electric energy when described gate-controlled switch disconnects and powers to the load.
2. uninterruptible power system according to claim 1, it is characterised in that described fuel electric generator includes diesel-driven generator.
3. uninterruptible power system according to claim 1, it is characterised in that described energy storage inversion system includes commutator, inverter, accumulator and charger; The input of described commutator is connected with the outfan of described fuel electric generator; The outfan of described commutator is connected with the first direct-flow input end of described inverter; The outfan of described inverter is connected with described points of common connection; The input of described accumulator is connected with the outfan of described charger; The outfan of described accumulator is connected with the second direct-flow input end of described inverter; The input of described charger is connected with described points of common connection.
4. uninterruptible power system according to claim 3, it is characterized in that, described charger is for being monitored the dump energy of described accumulator, and via described charger, described accumulator is charged by civil power when the dump energy of described accumulator is lower than threshold power.
5. uninterruptible power system according to claim 3, it is characterised in that described inverter includes harmonic and reactive currents and extracts circuit; Described harmonic and reactive currents extracts FFT module, filter module, adder and the inverse FFT module that circuit includes being sequentially connected with; The input of described FFT module is connected with described points of common connection;
Described FFT module is for being frequency domain by described load current from spatial transform, and is each harmonic in load current DC component, load current fundametal compoment and load current and idle component by described load current at frequency domain decomposition;
Described filter module is used for filtering described load current DC component and described load current fundametal compoment, and each harmonic in filtered load current and idle component is exported to described adder;
Described adder obtains frequency domain harmonic and reactive-current compensation command value for each harmonic in described load current and idle component are carried out addition;
Described inverse FFT module for being converted to time harmonic and reactive-current compensation command value by described frequency domain harmonic and reactive-current compensation command value;
Described accumulator is additionally operable to according to the harmonic and reactive currents compensating instruction value that extracts, the DC side of described inverter be powered, so that described inverter exports corresponding harmonics and reactive compensation electric current to points of common connection.
6. uninterruptible power system according to claim 5, it is characterised in that described filter module is high pass filter block.
7. uninterruptible power system according to claim 3, it is characterised in that described energy storage inversion system also includes switching switch; The first input end of described switching switch is connected with the outfan of described commutator; Second input of described switching switch is connected with the outfan of described accumulator; The outfan of described switching switch is connected with the DC side input of described inverter; Described switching switchs for being devoted oneself to work at city's electrical anomaly and described fuel electric generator, the direct-flow input end of described first input end with described inverter is connected when the alternating current that described fuel electric generator exports is converted to galvanic current, otherwise is connected with the direct-flow input end of described inverter by described second input by described commutator.
8. uninterruptible power system according to claim 1, it is characterised in that also include by-pass switch; Described by-pass switch is connected with civil power, load respectively; Described by-pass switch is for turning on thus directly being powered to the load by civil power when described uninterruptible power system needs to keep in repair.
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|---|---|---|---|
| CN201521144565.3U CN205319794U (en) | 2015-12-31 | 2015-12-31 | Uninterruptible power supply system |
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| CN201521144565.3U CN205319794U (en) | 2015-12-31 | 2015-12-31 | Uninterruptible power supply system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471092A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Uninterruptible power system |
| CN106026382A (en) * | 2016-07-28 | 2016-10-12 | 钟燏 | Standby emergency power supply |
| CN110957720A (en) * | 2019-11-15 | 2020-04-03 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
-
2015
- 2015-12-31 CN CN201521144565.3U patent/CN205319794U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105471092A (en) * | 2015-12-31 | 2016-04-06 | 易事特集团股份有限公司 | Uninterruptible power system |
| CN105471092B (en) * | 2015-12-31 | 2018-10-19 | 易事特集团股份有限公司 | Uninterruptible power system |
| CN106026382A (en) * | 2016-07-28 | 2016-10-12 | 钟燏 | Standby emergency power supply |
| CN106026382B (en) * | 2016-07-28 | 2018-08-14 | 钟燏 | A kind of spare emergent power source |
| CN110957720A (en) * | 2019-11-15 | 2020-04-03 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
| CN110957720B (en) * | 2019-11-15 | 2021-10-29 | 国网浙江省电力有限公司嘉兴供电公司 | Power supply system and method for stable power supply |
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