CN103647278A - High-capacity unified power disturbance generating device - Google Patents
High-capacity unified power disturbance generating device Download PDFInfo
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Abstract
The invention relates to a disturbance generating device, in particular to a high-capacity unified power disturbance generating device. The high-capacity unified power disturbance generating device is of a three-phase structure and comprises a power conversion module and a power electronic topological transformation module, wherein the rectification side of the power conversion module is connected to an alternating current power grid, the inversion side of the power conversion module is connected with one end of the power electronic topological transformation module, and the other end of the power electronic topological transformation module is connected to the power grid side at the load end. The restrictions on the voltage class and the capacity of a power electronic device are taken off, and a voltage disturbance generating device and a current disturbance generating device are integrated in one.
Description
Technical field
The present invention relates to a kind of disturbing generating device, be specifically related to a kind of large capacity and unify power disturbance generating means.
Background technology
The industrial various faults that need simulating grid voltage and current, with test that electrical network string is mended and and the performance of mending equipment, and the vulnerability to jamming of other industrial equipments to electric network fault.
The basic principle of voltage disturbance device is using power electronic equipment as voltage source, be connected between electrical network and load, simulating grid voltage fluctuation, flickering, asymmetric, temporary liter, degradation electric network fault temporarily, for the performance, technical grade product of testing series compensation equipment to the interference rejection ability of voltage etc.; Current disturbing device is Technics of Power Electronic Conversion device to be equivalent to electric current source occurs, the power network current faults such as the harmonic current of simulating grid, var, impulse current, unsymmetrical current, for the performance, technical grade product of testing shunt compensation equipment to interference rejection ability of power network current etc.
As shown in Figure 1, device generally comprises rectification side, DC side and inversion 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 inversion side provides required meritorious energy; Inversion side is directly connected or is connected on electrical network by transformer, injects given voltage, with the various voltage operating modes of simulating grid to electrical network; 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 inversion side to typical current disturbing device equally.Rectification side is identical with voltage disturbance device with DC side function; Inversion side directly in parallel or by transformers connected in parallel on electrical network, to electrical network, inject given electric current, with the various electric current operating modes of simulating grid.
Visible typical voltage disturbance generating means and current disturbing generating means are structurally distinguished and are mainly that inversion side joint enters the mode of electrical network: voltage disturbance device is to connect 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 needed disturbance device capacity of electric current and voltage fault in manufacture 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 capacity and unify power disturbance generating means, 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 capacity and unify power disturbance generating means, its improvements are, described device adopts three-phase structure, comprise power conversion module and power electronics topological transformation module, the rectification side joint of described power conversion module enters AC network, the inversion side of described power conversion module 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, the control protected mode of described power electronics topological transformation module employing state interlocking, for preventing the generation of thyristor unit TG1 and TG3 conducting simultaneously and thyristor unit TG2 and TG3 conducting simultaneously two states, the fault of avoiding electrical network to pass through the TG3 short circuit of thyristor unit occurs.
Further, described power conversion module comprises rectification side and inversion side, described rectification side adopts the single-phase transformer of many windings to connect single-phase H bridge transformer configuration, the former limit of described many windings single-phase transformer is by shunt reactor incoming transport side electrical network, and each winding of described many windings single-phase transformer secondary is connected with the AC of the single-phase H bridging of rectification side parallel operation successively; Described inversion 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 inversion side is by LC filter circuit and thyristor unit access power electronics topological transformation module.
Further, described H bridge cascade structure is comprised of the single-phase H bridging parallel operation of connecting, and described single-phase H bridging parallel operation is comprised of four brachium pontis, and each brachium pontis is comprised of IGBT module, and described IGBT module comprises that IGBT device and diode antiparallel with it form.
Further, between the single-phase H bridging parallel operation of the single-phase H bridging parallel operation of described rectification side and inversion side, be parallel with capacitor.
Further, the former limit of winding single-phase transformer more than three of described device three-phase structure and the connected mode of electrical network are star-like connection.
Further, described LC filter circuit is comprised of the capacitor of connecting and reactor; Described thyristor unit is comprised of antiparallel two thyristors.
Further, the inversion side joint of described power electronics topological transformation module change power conversion module enters the mode of electrical network, 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 respectively AC network side and load-side, and the input side incoming transport side electrical network of the H bridge cascade converter of inversion side; The two ends of other one group of three-phase thyristor unit connect respectively the outlet side of the H bridge cascade converter of load-side and inversion side; The 3rd group of three-phase thyristor unit is connected with the outlet side of the H bridge cascade converter of inversion side;
Described thyristor unit is comprised of antiparallel two thyristors.
Further, described three groups of three-phase thyristor unit are respectively thyristor unit TG1, TG2 and TG3;
When device is in voltage disturbance generation operating mode lower time, thyristor unit TG1 turn-offs, and TG2 conducting and TG3 turn-off, and the inversion side of power conversion module is series in direct current network, runs on voltage source state, injects grid disturbance voltage;
When device is in current disturbing generation operating mode lower time, the TG1 conducting of thyristor unit, TG2 turn-offs and TG3 conducting, and the inversion 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:
The large capacity of novel high-pressure provided by the invention is unified power disturbance generating means, pass through proposed high-voltage large-capacity power electronics topological structure, realized power disturbance device voltage and capacity extension modularization, without the structural design of series transformer, avoided the loss of voltage and the power loss of traditional disturbance device series transformer; By power electronics topological transformation function, voltage disturbance device is mutually comprehensive with current disturbing apparatus function, realized the expansion with covering device function, saved greatly industrial cost.
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 that high-voltage large-capacity provided by the invention is unified power disturbance generating means;
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 that high-voltage large-capacity provided by the invention is unified power disturbance generating means as shown in Figure 3, this device adopts three-phase structure, comprise power conversion module and power electronics topological transformation module, the rectification side joint of described power conversion module enters AC network, the inversion side of described power conversion module 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 module comprises rectification side and inversion side, described rectification side adopts the single-phase transformer of many windings to connect single-phase H bridge transformer configuration, the former limit of described many windings single-phase transformer is by shunt reactor incoming transport side electrical network, and each winding of described many windings single-phase transformer secondary is connected with the AC of the single-phase H bridging of rectification side parallel operation successively; Described inversion 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 inversion side is by LC filter circuit and thyristor unit access power electronics topological transformation module.
H bridge cascade structure is comprised of the single-phase H bridging parallel operation of connecting, and described single-phase H bridging parallel operation is comprised of four brachium pontis, and each brachium pontis is comprised of IGBT module, and described IGBT module comprises that IGBT device and diode antiparallel with it form.
Between the single-phase H bridging parallel operation of the single-phase H bridging parallel operation of rectification side and inversion side, be parallel with capacitor.The former limit of the winding single-phase transformer more than three of device three-phase structure is star-like connection.LC filter circuit is comprised of the capacitor of connecting and reactor; Described thyristor unit is comprised of antiparallel two thyristors.
For device rectification side, be equivalent to each H bridge independent operating in rectification operating mode, support separately DC voltage, 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 considering the even problem of DC side, the control of inversion side and modulation are more prone to realize.Due to the buffer action of side step-down transformer in parallel, DC side current potential is isolated completely, this has just guaranteed that the non-isolation method of inversion side directly accesses the feasibility of electrical network.Whole device, when design, can, by selecting the bridge of H back-to-back of varying number, be realized modular construction, to be adapted to different electric pressures and capacitance grade.
The effect of power electronics topological transformation functional module is to change the mode that inversion side joint enters 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 respectively AC network side and load-side, and the input side incoming transport side electrical network of the H bridge cascade converter of inversion side; The two ends of three-phase thyristor unit TG2 connect respectively the outlet side of each single-phase H bridge cascade converter of load-side and inversion side; Three-phase thyristor unit TG3 is connected with the outlet side of each H bridge cascade converter of inversion side;
Thyristor unit TG1, TG2 and TG3 form by antiparallel two thyristors.
When claimed apparatus is in voltage disturbance generation operating mode lower time, control TG1 and turn-off, TG2 conducting, TG3 turn-offs, and the inversion side of device is just series in electrical network, can run on voltage source state, to inject grid disturbance voltage;
When claimed apparatus is in voltage disturbance generation operating mode lower time, control TG1 conducting, TG2 turn-offs, TG3 conducting, the inversion side of device is just parallel in electrical network, can run on current source state, to inject grid disturbance electric current.(in the time of the TG1 conducting of thyristor unit, thyristor unit TG3 can not conducting for power electronics topological transformation module employing state interlocking; in the time of thyristor unit TG2 conducting, thyristor unit TG3 can not conducting) control protected mode; prevent the generation of TG1 and TG3 conducting simultaneously and TG2 and this two states of TG3 conducting simultaneously, with the fault of avoiding electrical network to pass through TG3 short circuit, occur.
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 the present invention is had been described in detail with reference to above-described embodiment, those of ordinary skill in the field are to be understood that: still can modify or be equal to replacement the specific embodiment of the present invention, and do not depart from any modification of spirit and scope of the invention or be equal to replacement, it all should be encompassed in the middle of claim scope of the present invention.
Claims (8)
1. a large capacity is unified power disturbance generating means, it is characterized in that, described device adopts three-phase structure, comprise power conversion module and power electronics topological transformation module, the rectification side joint of described power conversion module enters AC network, the inversion side of described power conversion module 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, the control protected mode of described power electronics topological transformation module employing state interlocking, for preventing the generation of thyristor unit TG1 and TG3 conducting simultaneously and thyristor unit TG2 and TG3 conducting simultaneously two states, the fault of avoiding electrical network to pass through the TG3 short circuit of thyristor unit occurs.
2. power disturbance generating means as claimed in claim 1, it is characterized in that, described power conversion module comprises rectification side and inversion side, described rectification side adopts the single-phase transformer of many windings to connect single-phase H bridge transformer configuration, the former limit of described many windings single-phase transformer is by shunt reactor incoming transport side electrical network, and each winding of described many windings single-phase transformer secondary is connected with the AC of the single-phase H bridging of rectification side parallel operation successively; Described inversion 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 inversion side is by LC filter circuit and thyristor unit access power electronics topological transformation module.
3. power disturbance generating means as claimed in claim 2, it is characterized in that, described H bridge cascade structure is comprised of the single-phase H bridging parallel operation of connecting, described single-phase H bridging parallel operation is comprised of four brachium pontis, each brachium pontis is comprised of IGBT module, and described IGBT module comprises that IGBT device and diode antiparallel with it form.
4. power disturbance generating means as claimed in claim 3, is characterized in that, between the single-phase H bridging parallel operation of the single-phase H bridging parallel operation of described rectification side and inversion side, is parallel with capacitor.
5. power disturbance generating means as claimed in claim 2, is characterized in that, the former limit of winding single-phase transformer more than three and the connected mode of electrical network of described device three-phase structure are star-like connection.
6. Unified Power Quality Controller as claimed in claim 2, is characterized in that, described LC filter circuit is comprised of the capacitor of connecting and reactor; Described thyristor unit is comprised of antiparallel two thyristors.
7. power disturbance generating means as claimed in claim 1, it is characterized in that, the inversion side joint of described power electronics topological transformation module change power conversion module enters the mode of electrical network, 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 respectively AC network side and load-side, and the input side incoming transport side electrical network of the H bridge cascade converter of inversion side; The two ends of other one group of three-phase thyristor unit connect respectively the outlet side of the bridge cascade converter of load-side and inversion side; The 3rd group of three-phase thyristor unit is connected with the outlet side of the H bridge cascade converter of inversion side;
Described thyristor unit is comprised of antiparallel two thyristors.
8. power disturbance generating means as claimed in claim 1, is characterized in that, described three groups of three-phase thyristor unit are respectively thyristor unit TG1, TG2 and TG3;
When device is in voltage disturbance generation operating mode lower time, thyristor unit TG1 turn-offs, and TG2 conducting and TG3 turn-off, and the inversion side of power conversion module is series in direct current network, runs on voltage source state, injects grid disturbance voltage;
When device is in current disturbing generation operating mode lower time, the TG1 conducting of thyristor unit, TG2 turn-offs and TG3 conducting, and the inversion side of device is parallel in electrical network, runs on current source state, injects grid disturbance electric current.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| 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 |
| 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 |
| CN109835213A (en) * | 2017-11-29 | 2019-06-04 | 株洲中车时代电气股份有限公司 | Ground automatic neutral-section passing device and its control method used in a kind of subregion |
| 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 |
| CN111064200A (en) * | 2019-11-27 | 2020-04-24 | 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 |
| CN111537794A (en) * | 2020-05-21 | 2020-08-14 | 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 |
| CN113156214A (en) * | 2021-05-14 | 2021-07-23 | 西南交通大学 | Broadband impedance measuring method of dual-mode disturbance and dual-mode disturbance device |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN109835213A (en) * | 2017-11-29 | 2019-06-04 | 株洲中车时代电气股份有限公司 | Ground automatic neutral-section passing device and its control method used in a kind of subregion |
| 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 |
| CN111064200A (en) * | 2019-11-27 | 2020-04-24 | 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 |
| CN111537794A (en) * | 2020-05-21 | 2020-08-14 | 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 |
| 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 |
| CN113156214A (en) * | 2021-05-14 | 2021-07-23 | 西南交通大学 | Broadband impedance measuring method of dual-mode disturbance and dual-mode disturbance 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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Effective date of registration: 20170527 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: CHINA EPRI SCIENCE & TECHNOLOGY Co.,Ltd. Patentee after: State Grid Corporation of China Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: STATE GRID SMART GRID Research Institute Patentee before: State Grid Corporation of China Co-patentee before: CHINA EPRI SCIENCE & TECHNOLOGY Co.,Ltd. |
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