CN204651915U - A kind of low voltage crossing assembly - Google Patents
A kind of low voltage crossing assembly Download PDFInfo
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- CN204651915U CN204651915U CN201520369456.5U CN201520369456U CN204651915U CN 204651915 U CN204651915 U CN 204651915U CN 201520369456 U CN201520369456 U CN 201520369456U CN 204651915 U CN204651915 U CN 204651915U
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Abstract
The utility model relates to applied power electronics technical field, a kind of low voltage crossing assembly, comprise rotor-side converter RSC, net side converter GSC, Chopper circuit integrated module, each integration module comprises N number of power device and N number of diode, wherein N number of diode just, negative pole is attempted by the emitter of N number of power device respectively, on collector electrode, rotor-side converter RSC, the collector electrode of the N number of power device in net side converter GSC, emitter is just being attempted by DC bus respectively, negative pole two ends, the emitter of the N number of power device in Chopper circuit connects with the negative pole of DC bus respectively, collector electrode connects with the positive pole of DC bus respectively by N number of bleeder resistance, rotor-side converter RSC, net side converter GSC is respectively by power line A, B, C three-phase and double feedback electric engine DFIG rotor, stator connects.The utility model the electric current of restrict rotor winding can ensure that again on bus, voltage is no more than the threshold value of setting, effectively improves wind powered generator system low voltage ride-through capability, realizes the uninterrupted operation of generator.
Description
Technical field
The utility model relates to a kind of low voltage crossing assembly, belongs to applied power electronics technical field.
Background technology
Along with the continuous increase of blower fan installed capacity, interacting between wind power system and electrical network is also increasing, and wherein the low voltage ride-through capability of wind power system becomes one of key factor affecting power grid security and stable operation.When grid collapses causes wind-driven generator set end voltage to fall, can not normally to electrical network transmission of electric energy, namely some energy cannot input electrical network, and the series of problems such as these energy will cause capacitor charging, direct voltage raises fast, rotor acceleration, electromagnetic torque sudden change occur.
Summary of the invention
In order to overcome the deficiencies in the prior art, the utility model object is to provide a kind of low voltage crossing assembly.When electrical grid failure or disturbance cause the Voltage Drop of wind farm grid-connected point; when rotor-side electric current or direct current bus bar pressure exceed the threshold value of setting; protective circuit also makes Chopper circuit put into operation, a large amount of dump energies is discharged by the bleeder resistance in circuit.Until line voltage recover normal after can the system of being excised out safely, thus achieve the low voltage crossing object of unit.
In order to realize foregoing invention object, solve problem existing in prior art, the technical scheme that the utility model is taked is: a kind of low voltage crossing assembly, comprises rotor-side converter RSC, net side converter GSC, electric capacity C and Chopper circuit, described rotor-side converter RSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter and electric capacity C are just being attempted by DC bus, negative pole two ends, described rotor-side converter RSC is by power line A, B, C three-phase connects with double feedback electric engine DFIG rotor, and described net side converter GSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter is just being attempted by DC bus, negative pole two ends, described net side converter GSC's leads up to power line A, B, C three-phase and transformer T-phase connect, and separately lead up to power line A, B, C three-phase connects with double feedback electric engine DFIG stator, and described transformer T connects with external electrical network, and described Chopper circuit is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN, N number of diode D1, D2 ... DN and N number of bleeder resistance R1, R2 ... RN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the emitter of IGBTN all connects with the negative pole of DC bus, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN is respectively by bleeder resistance R1, R2 ... RN connects with the positive pole of DC bus.
The utility model beneficial effect is: a kind of low voltage crossing assembly, comprises rotor-side converter RSC, net side converter GSC, electric capacity C and Chopper circuit, described rotor-side converter RSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter and electric capacity C are just being attempted by DC bus, negative pole two ends, described rotor-side converter RSC is by power line A, B, C three-phase connects with double feedback electric engine DFIG rotor, and described net side converter GSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter is just being attempted by DC bus, negative pole two ends, described net side converter GSC's leads up to power line A, B, C three-phase and transformer T-phase connect, and separately lead up to power line A, B, C three-phase connects with double feedback electric engine DFIG stator, and described transformer T connects with external electrical network, and described Chopper circuit is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN, N number of diode D1, D2 ... DN and N number of bleeder resistance R1, R2 ... RN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the emitter of IGBTN all connects with the negative pole of DC bus, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN is respectively by bleeder resistance R1, R2 ... RN connects with the positive pole of DC bus.Compared with the prior art, the utility model the electric current of restrict rotor winding can ensure that again on bus, voltage is no more than the threshold value of setting, effectively improves wind powered generator system low voltage ride-through capability, realizes the uninterrupted operation of generator.
Accompanying drawing explanation
Fig. 1 is the utility model schematic block circuit diagram.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, a kind of low voltage crossing assembly, comprises rotor-side converter RSC, net side converter GSC, electric capacity C and Chopper circuit, described rotor-side converter RSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter and electric capacity C are just being attempted by DC bus, negative pole two ends, described rotor-side converter RSC is by power line A, B, C three-phase connects with double feedback electric engine DFIG rotor, and described net side converter GSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter is just being attempted by DC bus, negative pole two ends, described net side converter GSC's leads up to power line A, B, C three-phase and transformer T-phase connect, and separately lead up to power line A, B, C three-phase connects with double feedback electric engine DFIG stator, and described transformer T connects with external electrical network, and described Chopper circuit is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN, N number of diode D1, D2 ... DN and N number of bleeder resistance R1, R2 ... RN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the emitter of IGBTN all connects with the negative pole of DC bus, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN is respectively by bleeder resistance R1, R2 ... RN connects with the positive pole of DC bus.When wind power system steady operation, Chopper circuit does not drop into, and power device disconnects; When the grid collapses, first judge whether DC bus-bar voltage exceedes default threshold value, if exceeded, then Chopper circuit drops into, and power device closes; When line voltage recovers normal, if DC bus-bar voltage is lower than the threshold value preset, then Chopper circuit cuts out, and power device disconnects.
The utility model advantage is: a kind of low voltage crossing assembly, the electric current of restrict rotor winding can ensure that again on bus, voltage is no more than the threshold value of setting, effectively improve wind powered generator system low voltage ride-through capability, realize the uninterrupted operation of generator.
Claims (1)
1. a low voltage crossing assembly, comprises rotor-side converter RSC, net side converter GSC, electric capacity C and Chopper circuit, described rotor-side converter RSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter and electric capacity C are just being attempted by DC bus, negative pole two ends, described rotor-side converter RSC is by power line A, B, C three-phase connects with double feedback electric engine DFIG rotor, and described net side converter GSC is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN and N number of diode D1, D2 ... DN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN, emitter is just being attempted by DC bus, negative pole two ends, described net side converter GSC's leads up to power line A, B, C three-phase and transformer T-phase connect, and separately lead up to power line A, B, C three-phase connects with double feedback electric engine DFIG stator, and described transformer T connects with external electrical network, it is characterized in that: described Chopper circuit is an integration module, comprises N number of power device IGBT1, IGBT2 ... IGBTN, N number of diode D1, D2 ... DN and N number of bleeder resistance R1, R2 ... RN, wherein diode D1, D2 ... DN just, negative pole is attempted by power device IGBT1 respectively, IGBT2 ... the emitter of IGBTN, on collector electrode, described power device IGBT1, IGBT2 ... the emitter of IGBTN all connects with the negative pole of DC bus, described power device IGBT1, IGBT2 ... the collector electrode of IGBTN is respectively by bleeder resistance R1, R2 ... RN connects with the positive pole of DC bus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369456.5U CN204651915U (en) | 2015-05-31 | 2015-05-31 | A kind of low voltage crossing assembly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520369456.5U CN204651915U (en) | 2015-05-31 | 2015-05-31 | A kind of low voltage crossing assembly |
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| Publication Number | Publication Date |
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| CN204651915U true CN204651915U (en) | 2015-09-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520369456.5U Expired - Fee Related CN204651915U (en) | 2015-05-31 | 2015-05-31 | A kind of low voltage crossing assembly |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337311A (en) * | 2015-12-01 | 2016-02-17 | 广西电网有限责任公司电力科学研究院 | Permanent-magnet direct-drive wind turbine generator set with low voltage ride through capability and coordination control strategy thereof |
-
2015
- 2015-05-31 CN CN201520369456.5U patent/CN204651915U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105337311A (en) * | 2015-12-01 | 2016-02-17 | 广西电网有限责任公司电力科学研究院 | Permanent-magnet direct-drive wind turbine generator set with low voltage ride through capability and coordination control strategy thereof |
| CN105337311B (en) * | 2015-12-01 | 2018-01-19 | 广西电网有限责任公司电力科学研究院 | A kind of permanent magnet direct drive synthronous wind-mill generator group for realizing low voltage crossing and its coordination control strategy |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 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: 20150916 |
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| CF01 | Termination of patent right due to non-payment of annual fee |