CN203423494U - Low voltage ride-through regulation and control device for constant speed wind generating set - Google Patents
Low voltage ride-through regulation and control device for constant speed wind generating set Download PDFInfo
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- CN203423494U CN203423494U CN201320284968.2U CN201320284968U CN203423494U CN 203423494 U CN203423494 U CN 203423494U CN 201320284968 U CN201320284968 U CN 201320284968U CN 203423494 U CN203423494 U CN 203423494U
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- inverter
- side inverter
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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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Abstract
The utility model relates to a low voltage ride-through regulation and control device for a constant speed wind generating set, comprising: a composite switch, a filter, a series inverter, a machine side inverter, a net side inverter, a direct current chopper energy-absorbing circuit, a machine side transformer, and a net side transformer; the left end of the composite switch is used as an input end, the right end of the composite switch is used as an output end, the machine side inverter is in a serial connection between the left end of the composite switch and the input end of the machine side inverter, the net side transformer is in a serial connection between the right end of the composite switch and the input end of the net side inverter; the two ends of the composite switch, the filter, the series inverter, and the input end of the direct current chopper energy-absorbing circuit are successively in a serial connection, and the output end of the direct current chopper energy-absorbing circuit is connected with the output end of the machine side inverter and the input end of the net side inverter. The low voltage ride-through regulation and control device is suitable for various symmetrical or asymmetrical fault conditions of a power system, and is advantaged by strong suitability, fast motion, and high reliability.
Description
[technical field]
The utility model belongs to LVRT Capability of Wind Turbine Generator technical field, and a kind of Fixed Speed Wind Turbine Generator group low voltage crossing regulation device is provided.
[background technology]
Low voltage crossing is a kind of specific operation function requirement that grid-connected blower fan is still kept when electrical network occurs that voltage falls to grid-connected, only has when line voltage falls lower than regulation curve and just allows wind-driven generator off-grid later.This just requires wind generator system to have stronger low voltage ride-through capability, simultaneously can be easily for electrical network provides reactive power support.
[utility model content]
The technical problems to be solved in the utility model is to provide a kind of wind turbine generator low-voltage regulation device, it is short-circuited fault or other disturbance while causing line voltage to decline when electric power system, can for active power and reactive power, support by Quick, to maintain the grid-connected point voltage of wind turbine generator side and frequency stabilization, thereby guarantee wind turbine generator off-grid not during electric power system fault, after Power system fault restoration, fast quick-recovery is to the ability of grid transmission.
Above-mentioned technical problem is achieved through the following technical solutions:
Wind turbine generator low-voltage regulation device, is characterized in that, comprising: combination switch, filter, series inverter, pusher side inverter, net side inverter, DC chopped-wave energy-absorbing circuit, pusher side transformer, net side transformer; The left end of combination switch is as input, the right-hand member of combination switch is as output, pusher side transformer is connected between the left end of combination switch and the input of pusher side inverter, and net side transformer is connected between the right-hand member of combination switch and the input of net side inverter; The input of the two ends of combination switch, filter, series inverter, DC chopped-wave energy-absorbing circuit is connected successively, the output of the output while junctor side inverter of DC chopped-wave energy-absorbing circuit, the input of net side inverter.
Combination switch consists of anti-parallel thyristor and circuit breaker parallel connection.
Filter comprises the first inductance, electric capacity and the second inductance connecting successively, and the two ends of electric capacity are as input, and the free end of the free end of the first inductance and the second inductance is jointly as output.
Series inverter comprises three H bridge inverters that consist of two IGBT brachium pontis.
Pusher side inverter and net side inverter are all the three-phase bridge inverters that consist of three IGBT brachium pontis;
DC chopped-wave energy-absorbing circuit comprises DC capacitor, copped wave IGBT, energy-absorbing resistance, in parallel with DC capacitor after copped wave IGBT connects with energy-absorbing resistance; The two ends of DC capacitor are as input, and the two ends after copped wave IGBT connects with energy-absorbing resistance R are as output.
The utility model has the advantage of: not only can be in electric power system under normal circumstances according to the effective conscientious dynamic passive compensation of the situation of exerting oneself of wind generator system, stabilize terminal voltage, improve blower fan the site quality of power supply, can also in electric power system generation voltage Sag Disturbance situation, realize Fault Isolation fast and effectively, maintain wind generator system and in section, normally move at the appointed time, and realize rapidly simultaneous interconnecting after power system recovery is normal; Can adapt to various symmetries, unbalanced fault situation that electric power system occurs, strong adaptability, action is fast, and reliability is high.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present utility model.
[embodiment]
As shown in Figure 1, a kind of wind turbine generator low-voltage regulation device 2 that the present embodiment provides comprises: combination switch 4, filter 5, series inverter 6, pusher side inverter 7, net side inverter 8, DC chopped-wave energy-absorbing circuit 9, pusher side transformer 10, net side transformer 11; The left end of combination switch 4 is as input, the right-hand member of combination switch 4 is as output, pusher side transformer 10 is connected between the left end of combination switch 4 and the input of pusher side inverter 7, net side transformer 11 is connected on two ends, filter 5, the series inverter 6 of combination switch 4 between the right-hand member of combination switch 4 and the input of net side inverter 8, the input of DC chopped-wave energy-absorbing circuit 9 is connected successively, and the output of DC chopped-wave energy-absorbing circuit 9 is the output, the input of net side inverter 8 of junctor side inverter 7 simultaneously.
Wherein, combination switch 4 consists of anti-parallel thyristor and circuit breaker parallel connection; Filter 5 comprises the first inductance L 1, capacitor C 1 and the second inductance L 2 connecting successively, and the two ends of capacitor C 1 are as input, and the free end of the free end of the first inductance L 1 and the second inductance L 2 is jointly as output; Series inverter 6 comprises three H bridge inverters that consist of two IGBT brachium pontis, the respectively corresponding H bridge inverter of each phase current; Pusher side inverter 7 and net side inverter 8 are all the three-phase bridge inverters that consist of three IGBT brachium pontis; DC chopped-wave energy-absorbing circuit 9 comprises DC capacitor C2, copped wave IGBT, energy-absorbing resistance R, in parallel with DC capacitor C2 after copped wave IGBT connects with energy-absorbing resistance R; The two ends of DC capacitor C2 are as input, and the two ends after copped wave IGBT connects with energy-absorbing resistance R are as output; Pusher side transformer 10 and net side transformer 11 are all to consist of two three-phase isolation transformers.
The utility model wind turbine generator low-voltage regulation device 2 arranges between wind turbine generator 1 and electric power system 3, and implement protection and control, specifically: electric power system 3 normal operation periods, combination switch 4 closures, the utility model is bypassed by combination switch 4; Wind turbine generator 1 can fluctuate according to the situation absorbing reactive power of exerting oneself in running, pusher side inverter 7 can be exerted oneself situation Quick for reactive power according to blower fan, maintain the stable of wind turbine generator 1 access point voltage A, net side inverter 8 is now stablized and system side harmonic wave inhibitory control for maintaining DC bus-bar voltage; When line voltage breaks down and while producing voltage dip, combination switch 4 disconnects rapidly, between the utility model access wind turbine generator 1 and electric power system 3, implement protection to control; The utility model is according to system failure situation, and output series connection bucking voltage and system voltage superpose, and the allowed band while making blower fan side voltage maintain normal operation absorbs whole active power that blower fan sends simultaneously; Now, DC bus-bar voltage of the present utility model has the trend of quick rising, net side inverter 8 rapidly according to line voltage situation according to self nominal current conditions to system active power of output, DC chopped-wave energy-absorbing circuit 9 discharges residue active power by energy-absorbing resistance simultaneously, maintains DC bus-bar voltage and is allowing voltage range; The utility model is held in allowed band by controller side inverter 7 and DC chopped-wave energy-absorbing circuit 9 by the set end voltage of wind generator system and frequency dimension; After system is recovered normally in section at the appointed time, by controller side inverter 7 and direct current energy-absorbing circuit 9, make voltage magnitude and the phase place of set end voltage amplitude and Phase Locked Systems, and realize quick simultaneous interconnecting by combination switch 4; If system does not recover normal in section at the appointed time, combination switch 4 is again closed, and low-voltage regulation device 2 is by the utility model bypass, thereby out of service.
The utility model is not limited to above-described embodiment, based on simple replacement above-described embodiment, that do not make creative work, should belong to the scope that the utility model discloses.
Claims (6)
1. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device, is characterized in that, comprising: combination switch, filter, series inverter, pusher side inverter, net side inverter, DC chopped-wave energy-absorbing circuit, pusher side transformer, net side transformer; The left end of combination switch is as input, the right-hand member of combination switch is as output, pusher side transformer is connected between the left end of combination switch and the input of pusher side inverter, and net side transformer is connected between the right-hand member of combination switch and the input of net side inverter; The input of the two ends of combination switch, filter, series inverter, DC chopped-wave energy-absorbing circuit is connected successively, the output of the output while junctor side inverter of DC chopped-wave energy-absorbing circuit, the input of net side inverter.
2. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device according to claim 1, is characterized in that, combination switch consists of anti-parallel thyristor and circuit breaker parallel connection.
3. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device according to claim 1, it is characterized in that, filter comprises the first inductance, electric capacity and the second inductance connecting successively, the two ends of electric capacity are as input, and the free end of the free end of the first inductance and the second inductance is jointly as output.
4. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device according to claim 1, is characterized in that, series inverter comprises three H bridge inverters that consist of two IGBT brachium pontis.
5. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device according to claim 1, is characterized in that, pusher side inverter and net side inverter are all the three-phase bridge inverters that consist of three IGBT brachium pontis.
6. Fixed Speed Wind Turbine Generator group low voltage crossing regulation device according to claim 1, is characterized in that, DC chopped-wave energy-absorbing circuit comprises DC capacitor, copped wave IGBT, energy-absorbing resistance, in parallel with DC capacitor after copped wave IGBT connects with energy-absorbing resistance; The two ends of DC capacitor are as input, and the two ends after copped wave IGBT connects with energy-absorbing resistance R are as output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320284968.2U CN203423494U (en) | 2013-05-22 | 2013-05-22 | Low voltage ride-through regulation and control device for constant speed wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320284968.2U CN203423494U (en) | 2013-05-22 | 2013-05-22 | Low voltage ride-through regulation and control device for constant speed wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN203423494U true CN203423494U (en) | 2014-02-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201320284968.2U Expired - Fee Related CN203423494U (en) | 2013-05-22 | 2013-05-22 | Low voltage ride-through regulation and control device for constant speed wind generating set |
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| CN (1) | CN203423494U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631355A (en) * | 2017-12-26 | 2018-10-09 | 北京金风科创风电设备有限公司 | Converter, electric control system and wind farm power transmission system |
-
2013
- 2013-05-22 CN CN201320284968.2U patent/CN203423494U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108631355A (en) * | 2017-12-26 | 2018-10-09 | 北京金风科创风电设备有限公司 | Converter, electric control system and wind farm power transmission system |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20190522 |
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| CF01 | Termination of patent right due to non-payment of annual fee |