CN103647278B - A kind of Large Copacity Unified Power disturbing generating device - Google Patents
A kind of Large Copacity Unified Power disturbing generating device Download PDFInfo
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Abstract
The present invention relates to a kind of disturbing generating device, be specifically related to a kind of Large Copacity Unified Power disturbing generating device.This device adopts three-phase structure, comprise power conversion modules and power electronics topological transformation module, the rectification side incoming transport electrical network of described power conversion modules, the inverter side of described power conversion modules is connected with described power electronics topological transformation module one end, and the other end of described power electronics topological transformation module connects the grid side of load end.The present invention not only solves power electronic equipment electric pressure and holds quantitative limitation, and makes voltage disturbance generating means and the unification of current disturbing generating means be same device.
Description
Technical field
The present invention relates to a kind of disturbing generating device, be specifically related to a kind of Large Copacity Unified Power disturbing generating device.
Background technology
The industrial various faults needing simulating grid voltage and current, with test electrical network string mend and and mend the performance of equipment, and other industrial equipments are to the vulnerability to jamming of electric network fault.
The general principle of voltage disturbance device is as voltage source using power electronic equipment, be connected between electrical network and load, simulating grid voltage fluctuation, flickering, asymmetric, temporary liter, temporarily degradation electric network fault, for testing the performance of series compensation equipment, technical grade product to the interference rejection ability etc. of voltage; Current disturbing device is that Technics of Power Electronic Conversion device is equivalent to electric current occurring source, the power network current fault such as harmonic current, var, impulse current, unsymmetrical current of simulating grid, for testing the performance of shunt compensation equipment, technical grade product to the interference rejection ability etc. of power network current.
As shown in Figure 1, device generally comprises rectification side, DC side and inverter side to typical voltage disturbance device.Rectification side is connected in parallel on electrical network, for absorbing the active current of electrical network, to support the voltage of DC side, for inverter side provides required meritorious energy; Inverter side directly connect or by transformer series on electrical network, inject given voltage to electrical network, with the various voltage operating mode of simulating grid; DC side connects two Technics of Power Electronic Conversion parts of current disturbing device, plays the effect of energy exchange passage.
As shown in Figure 2, device comprises rectification side, DC side and inverter side to typical current disturbing device equally.Rectification side is identical with voltage disturbance device with DC side function; Inverter side directly in parallel or by transformers connected in parallel on electrical network, inject given electric current to electrical network, with the various electric current operating mode of simulating grid.
Visible typical voltage disturbance generating means and current disturbing generating means structurally distinguish the mode being mainly inverter side access electrical network: voltage disturbance device is connected into electrical network, and current disturbing device is and links electrical network.
Voltage and current disturbing generating device is generally used in 10kV, 35kV and above electric pressure electrical network; The disturbance device capacity required for electric current and voltage fault manufactured in electrical network is generally MW level and higher level.Therefore, this device mostly is high-voltage large-capacity equipment.
Summary of the invention
For the deficiencies in the prior art, the object of this invention is to provide a kind of Large Copacity Unified Power disturbing generating device, large-capacity power electronic power conversion module is combined with power electronics topological transformation functional module, the unification of implement device voltage disturbance generating function and current disturbing generating function.
The object of the invention is to adopt following technical proposals to realize:
The invention provides a kind of Large Copacity Unified Power disturbing generating device, its improvements are, described device adopts three-phase structure, comprise power conversion modules and power electronics topological transformation module, the rectification side incoming transport electrical network of described power conversion modules, the inverter side of described power conversion modules is connected with described power electronics topological transformation module one end, the other end of described power electronics topological transformation module connects the grid side of load end, described power electronics topological transformation module adopts the Control protection mode of state interlocking, for preventing the generation of thyristor cell TG1 and TG3 conducting simultaneously and thyristor cell TG2 and TG3 conducting simultaneously two states, electrical network is avoided to be occurred by the fault of thyristor cell TG3 short circuit.
Further, described power conversion modules comprises rectification side and inverter side, described rectification side adopts the single-phase transformer of Multiple coil to connect single-phase H bridge transformer configuration, the described former limit of Multiple coil single-phase transformer is by shunt reactor incoming transport side electrical network, and the AC of each winding of described Multiple coil single-phase transformer secondary H bridging parallel operation single-phase with rectification side is successively connected; Described inverter side adopts H bridge cascade structure, the single-phase H bridging parallel operation of H bridge cascade structure single-phase H bridging parallel operation and rectification side forms " back-to-back " structure, and each single-phase H bridging parallel operation of inverter side is by LC filter circuit and thyristor cell access power electronics topological transformation module.
Further, described H bridge cascade structure is made up of the single-phase H bridging parallel operation of connecting, and described single-phase H bridging parallel operation is made up of four brachium pontis, and each brachium pontis is made up of IGBT module, and described IGBT module comprises IGBT device and diode antiparallel with it composition.
Further, capacitor is parallel with between the single-phase H bridging parallel operation of described rectification side and the single-phase H bridging parallel operation of inverter side.
Further, the former limit of three Multiple coil single-phase transformers of described device three-phase structure is star-like connection with the connected mode of electrical network.
Further, described LC filter circuit is made up of the capacitor of connecting and reactor; Described thyristor cell is made up of antiparallel two thyristors.
Further, described power electronics topological transformation module changes the mode of the inverter side access electrical network of power conversion modules, described power electronics topological transformation module comprises three groups of three-phase thyristor unit, wherein the two ends of one group of three-phase thyristor unit connect AC network side and load-side respectively, and the input side incoming transport side electrical network of the H bridge cascade converter of inverter side; The two ends of other one group of three-phase thyristor unit connect the outlet side of the H bridge cascade converter of load-side and inverter side respectively; 3rd group of three-phase thyristor unit is connected with the outlet side of the H bridge cascade converter of inverter side;
Described thyristor cell is made up of antiparallel two thyristors.
Further, described three groups of three-phase thyristor unit are respectively thyristor cell TG1, TG2 and TG3;
When device is under voltage disturbance generation operating mode, thyristor cell TG1 turns off, and TG2 conducting and TG3 turn off, and the inverter side of power conversion modules is series in direct current network, runs on voltage source state, injects grid disturbance voltage;
When device is under current disturbing generation operating mode, thyristor cell TG1 conducting, TG2 turns off and TG3 conducting, and the inverter side of device is parallel in electrical network, runs on current source state, injects grid disturbance electric current.
Compared with the prior art, the beneficial effect that the present invention reaches is:
Novel high-pressure Large Copacity Unified Power disturbing generating device provided by the invention, pass through proposed high-voltage large-capacity power electronics topological structure, achieve the modularization of power disturbance device voltage and capacity extension, avoid the loss of voltage and the power loss of traditional disturbance device series transformer without the structural design of series transformer; By power electronics topological transformation function, voltage disturbance device is comprehensive mutually with current disturbing apparatus function, achieve the expansion of same covering device function, save industrial cost greatly.
Accompanying drawing explanation
Fig. 1 is typical voltage disturbance apparatus structure schematic diagram;
Fig. 2 is typical current disturbing apparatus structure schematic diagram;
Fig. 3 is the structural representation of high-voltage large-capacity Unified Power disturbing generating device provided by the invention;
Fig. 4 is the structural representation of power electronics topological transformation functional module provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
The structural representation of high-voltage large-capacity Unified Power disturbing generating device provided by the invention as shown in Figure 3, this device adopts three-phase structure, comprise power conversion modules and power electronics topological transformation module, the rectification side incoming transport electrical network of described power conversion modules, the inverter side of described power conversion modules is connected with described power electronics topological transformation module one end, and the other end of described power electronics topological transformation module connects the grid side of load end.。
Power conversion modules comprises rectification side and inverter side, described rectification side adopts the single-phase transformer of Multiple coil to connect single-phase H bridge transformer configuration, the described former limit of Multiple coil single-phase transformer is by shunt reactor incoming transport side electrical network, and the AC of each winding of described Multiple coil single-phase transformer secondary H bridging parallel operation single-phase with rectification side is successively connected; Described inverter side adopts H bridge cascade structure, the single-phase H bridging parallel operation of H bridge cascade structure single-phase H bridging parallel operation and rectification side forms " back-to-back " structure, and the H bridge cascade converter of inverter side is by LC filter circuit and thyristor cell access power electronics topological transformation module.
H bridge cascade structure is made up of the single-phase H bridging parallel operation of connecting, and described single-phase H bridging parallel operation is made up of four brachium pontis, and each brachium pontis is made up of IGBT module, and described IGBT module comprises IGBT device and diode antiparallel with it composition.
Capacitor is parallel with between the single-phase H bridging parallel operation of rectification side and the single-phase H bridging parallel operation of inverter side.The former limit of three Multiple coil single-phase transformers of device three-phase structure is star-like connection.LC filter circuit is made up of the capacitor of connecting and reactor; Described thyristor cell is made up of antiparallel two thyristors.
For device rectification side, be equivalent to each H bridge independent operating in rectification operating mode, support DC voltage separately, can not influence each other, be conducive to the consistency of DC voltage; For series side, the H bridge construction of cascade is beneficial to the raising of electric pressure and capacity, and owing to need not consider DC side uniformity problem, the control of inverter side and modulation are more prone to realize.Due to the buffer action of side in parallel step-down transformer, make DC side current potential completely isolated, this guarantees the feasibility that inverter side non-isolated mode directly accesses electrical network.Whole device, when designing, by selecting the bridge of H back-to-back of varying number, realizes modular construction, to be adapted to different electric pressures and capacitance grade.
The effect of power electronics topological transformation functional module is the mode changing inverter side access electrical network, and the structural representation of power electronics topological transformation functional module provided by the invention as shown in Figure 4, comprises three groups of three-phase thyristor unit TG1, TG2, TG3.The two ends of three-phase thyristor unit TG1 connect AC network side and load-side respectively, and the input side incoming transport side electrical network of the H bridge cascade converter of inverter side; The two ends of three-phase thyristor unit TG2 connect the outlet side of each single-phase H bridge cascade converter of load-side and inverter side respectively; Three-phase thyristor unit TG3 is connected with the outlet side of each H bridge cascade converter of inverter side;
Thyristor cell TG1, TG2 and TG3 are by antiparallel two thyristors composition.
When claimed apparatus is under voltage disturbance generation operating mode, control TG1 turns off, TG2 conducting, and TG3 turns off, and the inverter side of device is just series in electrical network, can run on voltage source state, to inject grid disturbance voltage;
When claimed apparatus is under voltage disturbance generation operating mode, control TG1 conducting, TG2 turns off, and TG3 conducting, the inverter side of device is just parallel in electrical network, can run on current source state, to inject grid disturbance electric current.Power electronics topological transformation module adopts state interlocking, and (when thyristor cell TG1 conducting, thyristor cell TG3 can not conducting; when thyristor cell TG2 conducting, thyristor cell TG3 can not conducting) Control protection mode; prevent the generation of TG1 and TG3 conducting simultaneously and this two states of TG2 and TG3 conducting simultaneously, occurred by the fault of TG3 short circuit to avoid electrical network.
Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although with reference to above-described embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or equivalent replacement, and not departing from any amendment of spirit and scope of the invention or equivalent replacement, it all should be encompassed in the middle of right of the present invention.
Claims (5)
1. a Large Copacity Unified Power disturbing generating device, it is characterized in that, described device adopts three-phase structure, comprise power conversion modules and power electronics topological transformation module, the rectification side incoming transport electrical network of described power conversion modules, the inverter side of described power conversion modules is connected with described power electronics topological transformation module one end, the other end of described power electronics topological transformation module connects the grid side of load end, described power electronics topological transformation module adopts the Control protection mode of state interlocking, for preventing the generation of three-phase thyristor unit TG1 and TG3 conducting simultaneously and three-phase thyristor unit TG2 and TG3 conducting simultaneously two states, electrical network is avoided to be occurred by the fault of three-phase thyristor unit TG3 short circuit,
Described power conversion modules comprises rectification side and inverter side, described rectification side adopts the single-phase transformer of Multiple coil to connect single-phase H bridge transformer configuration, the described former limit of Multiple coil single-phase transformer is by shunt reactor incoming transport side electrical network, and the AC of each winding of described Multiple coil single-phase transformer secondary H bridging parallel operation single-phase with rectification side is successively connected; Described inverter side adopts H bridge cascade structure, the single-phase H bridging parallel operation of the single-phase H bridging parallel operation in H bridge cascade structure and rectification side forms " back-to-back " structure, and each single-phase H bridging parallel operation of inverter side is by LC filter circuit and thyristor cell access power electronics topological transformation module;
Described power electronics topological transformation module changes the mode of the inverter side access electrical network of power conversion modules, described power electronics topological transformation module comprises three groups of three-phase thyristor unit, and three groups of three-phase thyristor unit are respectively three-phase thyristor unit TG1, TG2 and TG3; Wherein the two ends of one group of three-phase thyristor unit TG1 connect AC network side and load-side respectively, and the input side incoming transport side electrical network of the H bridge cascade structure of inverter side; The two ends of other one group of three-phase thyristor unit TG2 connect the outlet side of the H bridge cascade structure of rectification side single-phase H bridging parallel operation and inverter side respectively; One end of 3rd group of three-phase thyristor unit TG3 is connected with the outlet side of the H bridge cascade structure of inverter side, and the other end is the common port of three thyristor cell in the 3rd group of three-phase thyristor unit TG3;
Three-phase thyristor unit TG1, TG2 and TG3 compose in parallel by three thyristor cell; Described thyristor cell is made up of antiparallel two thyristors;
When device is under voltage disturbance generation operating mode, three-phase thyristor unit TG1 turns off, and TG2 conducting and TG3 turn off, and the inverter side of power conversion modules is series in direct current network, runs on voltage source state, injects grid disturbance voltage;
When device is under current disturbing generation operating mode, three-phase thyristor unit TG1 conducting, TG2 turns off and TG3 conducting, and the inverter side of power conversion modules is parallel in electrical network, runs on current source state, injects grid disturbance electric current.
2. power disturbance generating means as claimed in claim 1, it is characterized in that, described H bridge cascade structure is made up of the single-phase H bridging parallel operation of connecting, inverter side and the single-phase H bridging parallel operation both rectification side form by four brachium pontis, each brachium pontis is made up of IGBT module, and described IGBT module comprises IGBT device and diode antiparallel with it composition.
3. power disturbance generating means as claimed in claim 2, is characterized in that, be parallel with capacitor between the single-phase H bridging parallel operation of described rectification side and the single-phase H bridging parallel operation of inverter side.
4. power disturbance generating means as claimed in claim 1, it is characterized in that, the former limit of three Multiple coil single-phase transformers of described device three-phase structure is star-like connection with the connected mode of electrical network.
5. power disturbance generating means as claimed in claim 1, it is characterized in that, described LC filtered electrical routing capacitor and reactor are composed in series.
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| CN104065279A (en) * | 2014-06-25 | 2014-09-24 | 西安理工大学 | Voltage disturbance generation device and method for simulating power grid disturbance |
| CN106972759A (en) * | 2017-05-26 | 2017-07-21 | 云南电网有限责任公司电力科学研究院 | A kind of power supply of simulating grid disturbance |
| CN108107341A (en) * | 2017-10-31 | 2018-06-01 | 南京南瑞集团公司 | A kind of test platform applied to the direct cascaded H axle assemble of IGBT device |
| CN107947598A (en) * | 2017-11-23 | 2018-04-20 | 中国电力科学研究院 | A kind of high-frequency isolation grid disturbance device |
| CN109835213B (en) * | 2017-11-29 | 2021-12-24 | 株洲中车时代电气股份有限公司 | Ground automatic neutral section passing device for subareas and control method thereof |
| CN109521276A (en) * | 2018-10-19 | 2019-03-26 | 湖南大学 | A kind of high-voltage large-capacity impedance measurement device and its disturbance control method |
| CN110794231A (en) * | 2019-10-25 | 2020-02-14 | 上海电气集团股份有限公司 | High-low voltage ride through test device for wind power pitch system |
| CN111064200B (en) * | 2019-11-27 | 2022-04-05 | 武汉船用电力推进装置研究所（中国船舶重工集团公司第七一二研究所） | Railway purification power supply device and fault exit protection method thereof |
| CN111537794B (en) * | 2020-05-21 | 2023-02-28 | 国网江苏省电力有限公司电力科学研究院 | Topological system, control method and storage medium of three-port impedance frequency sweeping device |
| CN113156214B (en) * | 2021-05-14 | 2022-04-01 | 西南交通大学 | Dual-mode broadband disturbance device and control method |
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| EP1573878B1 (en) * | 2002-11-04 | 2016-03-23 | Jovan Bebic | Hybrid power flow controller and method |
| KR100830351B1 (en) * | 2007-09-12 | 2008-05-20 | 국제통신공업 주식회사 | Insulated gate bipolar transistor uninterruptible power supply system |
| CN101453171B (en) * | 2008-09-12 | 2011-09-28 | 清华大学 | United electric energy quality controller based on series multiplex of transformer and chain type construction |
| CN102412544B (en) * | 2011-12-09 | 2015-07-15 | 贺长宏 | Power-uninterrupted ice melting and SVG-type reactive static compensation compound device and use method thereof |
| CN103066599B (en) * | 2012-12-13 | 2015-04-29 | 清华大学 | Three-phase three-wire system mixed type integrated power system electric energy quality regulator |
| CN103078316B (en) * | 2013-01-06 | 2015-02-04 | 湖北省电力公司电力科学研究院 | Network voltage disturbance generating device and control method thereof |
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