CN204361685U - Wind turbine generator pusher side filter - Google Patents
Wind turbine generator pusher side filter Download PDFInfo
- Publication number
- CN204361685U CN204361685U CN201520089057.3U CN201520089057U CN204361685U CN 204361685 U CN204361685 U CN 204361685U CN 201520089057 U CN201520089057 U CN 201520089057U CN 204361685 U CN204361685 U CN 204361685U
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- CN
- China
- Prior art keywords
- pusher side
- filter
- wind turbine
- lrc
- side inverter
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 238000001914 filtration Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
-
- 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
Abstract
The utility model embodiment provides a kind of wind turbine generator pusher side filter, and comprising: LRC filter and ground capacity, described LRC filter is connected to the AC of pusher side inverter; Described LRC filter comprises inductance, filter capacitor and resistance, and described inductance is connected on the AC of described pusher side inverter, forms RC loop and described inductance in parallel after described filter capacitor and described resistant series; Connect after described ground capacity and described RC circuit in series " ".The technical solution of the utility model can the common mode interference signal that produces of filtering pusher side inverter, reduces the du/dt of pusher side inverter ac side common mode and differential mode voltage, restriction generator end common and different mode overvoltage, and improves electric motor starting performance.
Description
Technical field
The utility model relates to electric and electronic technical field, particularly relates to a kind of wind turbine generator pusher side filter.
Background technology
In permanent magnet direct-driving aerogenerator group, full power convertor is generally placed into bottom column foot, and generator is generally placed in tower cylinder top, is connected between current transformer and generator by the long cable more than 70 meters.Owing to containing insulated gate bipolar transistor (Insulated Gate BipolarTransistor, IGBT) switching device in current transformer, this switching device is turning on and off in process, can produce very large pulse voltage du/dt.If this value can more than 800V/ μ s without filtering, if theoretical known not at generator side installing filter reduction Du/dt by traveling wave, common-mode voltage and the differential mode voltage overvoltage of generator end can be caused, generator insulating time serious, can be caused to lose efficacy and damaged.
Utility model content
Embodiment of the present utility model provides a kind of wind turbine generator pusher side filter, can filtering pusher side inverter produce common mode interference signal, reduce the du/dt of pusher side inverter ac side common mode and differential mode voltage, restriction generator end overvoltage, and improve electric motor starting performance.
For achieving the above object, embodiment of the present utility model provides a kind of wind turbine generator pusher side filter, and comprising: LRC filter and ground capacity, described LRC filter is connected to the AC of pusher side inverter;
Described LRC filter comprises inductance, filter capacitor and resistance, and described inductance is connected on the AC of described pusher side inverter, forms RC loop and described inductance in parallel after described filter capacitor and described resistant series;
Connect after described ground capacity and described RC circuit in series " ".
Wind turbine generator pusher side filter as above, described LRC filter and generator unit stator are connected by long cable.
Wind turbine generator pusher side filter as above, described generator is permanent magnet direct-driving aerogenerator.
The wind turbine generator pusher side filter that the utility model embodiment provides, LRC filter is connected to the AC of pusher side inverter, by reducing the du/dt value of the differential mode pulse voltage of pusher side inverter ac side, thus by generator end differential mode overvoltage Limiting below generator withstand voltage.Simultaneously by a ground capacity of connecting on LRC filter, can the common mode interference signal of effective filtering pusher side inverter ac side, thus the common mode overpressure value of generator end is reduced to below generator withstand voltage.By being connected to the AC of the pusher side inverter of wind turbine generator after being connected with ground capacity by LRC filter, reach filtering common mode and differential mode voltage interference, reduce common mode and differential mode pulse voltage du/dt thus restriction generator end common mode and differential mode overvoltage, the object of electric motor starting performance improved.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural representation of the wind turbine generator pusher side filter embodiment that Fig. 1 provides for the utility model.
Drawing reference numeral explanation
1-LRC filter, 2-pusher side inverter, 3-net side inverter and network system, 4-generator, 5-long cable, L-inductance, C1-ground capacity, C2-filter capacitor, C3-bus capacitor, R-resistance.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not paying the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
The structural representation of the wind turbine generator pusher side filter embodiment that Fig. 1 provides for the utility model.As shown in Figure 1, this filter comprises: LRC filter 1 and ground capacity C1; Described LRC filter 1 is connected to the AC of pusher side inverter 2; Wherein:
LRC filter 1 comprises inductance L, filter capacitor C2 and resistance R, and described inductance L is connected on the AC of pusher side inverter 2, and it is in parallel with inductance L that filter capacitor C2 and resistance R forms RC loop after connecting;
Connect after described ground capacity C1 and RC circuit in series " ".
Usually bus capacitor C3 and net side inverter and network system 3 is also connected with in the DC side of pusher side inverter 2.
In the embodiment shown in fig. 1, the stator of LRC filter 1 and generator 4 is connected by long cable 5.
In the embodiment shown in fig. 1, described generator 4 can be specially permanent magnet direct-driving aerogenerator.
The utility model illustrated embodiment, by LRC filter being connected to the AC of pusher side inverter, can reduce the du/dt value of differential mode pulse voltage, thus by the differential mode overvoltage Limiting of generator end below generator withstand voltage; Simultaneously by a ground capacity of connecting on the RC loop of LRC filter, can the common mode interference signal of effective filtering pusher side inverter ac side, and then the du/dt of reduction common mode pulse voltage to a great extent.Because the du/dt of common mode occupies larger ratio in the du/dt that pusher side inverter exports, therefore carrying out the common mode disturbance voltage of the AC of filtering pusher side inverter by introducing above-mentioned ground capacity C1, the du/dt value of common mode pulse voltage can be effectively reduced; And theoretical according to traveling wave, reduce the du/dt value of common mode and differential mode voltage, common mode and the differential mode overvoltage value of generator end can be effectively reduced, thus eliminate the single order RC filter of generator end connection, provide cost savings.
The utility model illustrated embodiment, by being connected to the AC of the pusher side inverter of wind turbine generator after being connected with ground capacity by LRC filter, reach filtering common mode and differential mode voltage interference, the du/dt reducing common mode and differential mode pulse voltage, restriction generator end common mode and differential mode overvoltage value, improve the object of electric motor starting performance.
One of ordinary skill in the art will appreciate that: accompanying drawing is the schematic diagram of an embodiment, the module in accompanying drawing or flow process might not be that enforcement the utility model is necessary.Module in device in embodiment can describe according to embodiment and be distributed in the device of embodiment, also can carry out respective change and be arranged in the one or more devices being different from the present embodiment.The module of above-described embodiment can merge into a module, also can split into multiple submodule further.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (3)
1. a wind turbine generator pusher side filter, is characterized in that, comprising: LRC filter and ground capacity, and described LRC filter is connected to the AC of pusher side inverter;
Described LRC filter comprises inductance, filter capacitor and resistance, and described inductance is connected on the AC of described pusher side inverter, forms RC loop and described inductance in parallel after described filter capacitor and described resistant series;
Connect after described ground capacity and described RC circuit in series " ".
2. wind turbine generator pusher side filter according to claim 1, is characterized in that, described LRC filter and generator unit stator are connected by long cable.
3. wind turbine generator pusher side filter according to claim 2, is characterized in that, described generator is permanent magnet direct-driving aerogenerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520089057.3U CN204361685U (en) | 2015-02-09 | 2015-02-09 | Wind turbine generator pusher side filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520089057.3U CN204361685U (en) | 2015-02-09 | 2015-02-09 | Wind turbine generator pusher side filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204361685U true CN204361685U (en) | 2015-05-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520089057.3U Active CN204361685U (en) | 2015-02-09 | 2015-02-09 | Wind turbine generator pusher side filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN204361685U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689735A (en) * | 2016-08-05 | 2018-02-13 | 台达电子企业管理（上海）有限公司 | Power conversion system and its common-mode voltage suppressing method |
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
-
2015
- 2015-02-09 CN CN201520089057.3U patent/CN204361685U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107689735A (en) * | 2016-08-05 | 2018-02-13 | 台达电子企业管理（上海）有限公司 | Power conversion system and its common-mode voltage suppressing method |
| CN107689735B (en) * | 2016-08-05 | 2020-01-31 | 台达电子企业管理（上海）有限公司 | Power conversion system and common-mode voltage suppression method thereof |
| CN110571854A (en) * | 2019-09-06 | 2019-12-13 | 深圳市禾望电气股份有限公司 | Wind power generation system |
| CN110571854B (en) * | 2019-09-06 | 2023-10-20 | 深圳市禾望电气股份有限公司 | Wind power generation system |
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