CN203911500U - Wind power plant grid-connected network topology structure - Google Patents
Wind power plant grid-connected network topology structure Download PDFInfo
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- CN203911500U CN203911500U CN201420280998.0U CN201420280998U CN203911500U CN 203911500 U CN203911500 U CN 203911500U CN 201420280998 U CN201420280998 U CN 201420280998U CN 203911500 U CN203911500 U CN 203911500U
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- 238000010248 power generation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010033799 Paralysis Diseases 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
Provided is a wind power plant grid-connected network topology structure that comprises wind-driven generators, area power grid current collection buses, a boosting transformer, an external power distribution network, grid-connected contactors, grid-connected switches, and interconnection switches. The boosting transformer comprises a master boosting transformer and a standby boosting transformer. Each wind-driven generator is successively connected in series with a grid-connected contactor and a grid-connected switch and then is connected to an area power grid current collection bus. All area power grid current collection buses are connected in parallel and the two ends of the area power grid current collection buses connected in parallel are connected with the master boosting transformer and the standby boosting transformer, respectively. Any two area power grid current collection buses form a loop network structure. The master boosting transformer and the standby boosting transformer are connected with the external power distribution network through the interconnection switches. The wind power plant grid-connected network topology structure not only achieves a redundancy function of wind power plant grid connection and improves operating reliability of the wind power plant, but also improves system reliability.
Description
Technical field
The utility model relates to distribution network technical field of structures, specifically a kind of wind farm grid-connected network topology structure.
Background technology
In recent years, wind power generation development rapidly, occupies an important seat in renewable energy power generation.The wind generator system being incorporated into the power networks is that wind power generation is incorporated to conventional operation of power networks, to large electrical network, provides electric power.Electrical system is the main part of wind energy turbine set, include a large amount of electric equipments, as shown in Figure 1, at present, wind farm grid-connected general employing star structure, first wind-driven generator adopts star structure to be connected with regional power grid current collection bus, and then regional power grid current collection bus adopts star structure to be connected with step-up transformer, and step-up transformer accesses extraneous power distribution network.Wind energy turbine set adopts the also net mode of star structure, general cost is lower, but, its reliable rate is lower, line failure the closer to step-up transformer, impact on wind energy turbine set is larger, and especially, when step-up transformer accesses bus between extraneous power distribution network and breaks down, whole wind energy turbine set will paralyse.
Utility model content
For above-mentioned deficiency, the utility model provides a kind of wind farm grid-connected network topology structure, and it can improve the operational reliability of wind energy turbine set.
The technical scheme in the invention for solving the technical problem is: a kind of wind farm grid-connected network topology structure, comprise wind-driven generator, regional power grid current collection bus, step-up transformer and extraneous power distribution network, it is characterized in that, also comprise grid-connected contactor, grid-connected switch and interconnection switch, described step-up transformer comprises primary voltage boosting transforming device and standby voltage boosting transforming device; Described wind-driven generator is connected successively after grid-connected contactor and grid-connected switch and is accessed regional power grid current collection bus, the two ends of described regional power grid current collection bus are connected with standby voltage boosting transforming device with primary voltage boosting transforming device respectively, and described primary voltage boosting transforming device and standby voltage boosting transforming device access extraneous power distribution network by interconnection switch respectively; All regional power grid current collection buses are connected in parallel between primary voltage boosting transforming device and standby voltage boosting transforming device, and any two regional power grid current collection buses form ring network structure.
Further, wind farm grid-connected network topology structure described in the utility model also comprises current transformer, and described current transformer is connected between wind-driven generator and regional power grid current collection bus.
Further, wind farm grid-connected network topology structure described in the utility model also comprises section breaker, and described section breaker is connected between adjacent two regional power grid current collection buses.
The beneficial effects of the utility model are: adopt after said structure, regional power grid current collection bus adopts ring network structure to be connected, make the every typhoon group of motors institute electricity of wind energy turbine set have two passages to enter extraneous power distribution network, realize wind farm grid-connected redundancy feature, improved the reliable rate of wind energy turbine set; Adopt primary, spare voltage boosting transforming device, when primary voltage boosting transforming device breaks down or overhauls, still have standby voltage boosting transforming device can maintain wind energy turbine set operation, strengthened system reliability.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of wind farm grid-connected network topology structure in prior art;
Fig. 2 is wind farm grid-connected network topology structure schematic diagram of the present utility model;
In figure, 1 wind-driven generator, 11 grid-connected contactors, 12 grid-connected switches, 13 current transformers, 2 regional power grid current collection buses, 21 section breakeres, 3 step-up transformers, 31 primary voltage boosting transforming devices, 32 standby voltage boosting transforming devices, 33 interconnection switches, 4 extraneous power distribution networks.
Embodiment
For clearly demonstrating the technical characterstic of this programme, below by embodiment, and in conjunction with its accompanying drawing, the utility model is elaborated.Disclosing below provides many different embodiment or example to be used for realizing different structure of the present utility model.Of the present utility model open in order to simplify, hereinafter the parts of specific examples and setting are described.In addition, the utility model can be in different examples repeat reference numerals and/or letter.This repetition is in order to simplify and object clearly, itself do not indicate the relation between discussed various embodiment and/or setting.It should be noted that illustrated parts are not necessarily drawn in proportion in the accompanying drawings.The utility model has omitted the description of known assemblies and treatment technology and technique to avoid unnecessarily limiting the utility model.
As shown in Figure 2, a kind of wind farm grid-connected network topology structure of the present utility model, it comprises wind-driven generator 1, regional power grid current collection bus 2, primary voltage boosting transforming device 31, standby voltage boosting transforming device 32 and extraneous power distribution network 4, also comprises grid-connected contactor 11, grid-connected switch 12, current transformer 13, section breaker 21 and interconnection switch 33.Each typhoon power generator all connect successively corresponding grid-connected contactor 11 and regional power grid current collection bus corresponding to the rear access of grid-connected switch 12, grid-connected contactor 11 and grid-connected switch 12 are controlled according to following logical action: when 1) grid-connected, first close described grid-connected switch 12, then close described grid-connected contactor 11; 2), during normal off-grid, disconnect described grid-connected contactor 11; 3), during fault off-grid, disconnect described grid-connected switch 12; Or during fault off-grid, when electric current is greater than default threshold value, disconnect described grid-connected switch 12, when electric current is less than described threshold value, disconnect described grid-connected contactor 11.Described current transformer 13 is connected between wind-driven generator and regional power grid current collection bus, in order to changeable wind-force electric energy is transformed into stable electric energy feed-in electrical network.The two ends of all regional power grid current collection buses 2 are connected with standby voltage boosting transforming device 32 with primary voltage boosting transforming device 31 respectively, and described primary voltage boosting transforming device 31 and standby voltage boosting transforming device 32 are respectively by the extraneous power distribution network 4 of interconnection switch 33 access.All regional power grid current collection buses 2 are connected in parallel between primary voltage boosting transforming device 31 and standby voltage boosting transforming device 32, any two regional power grid current collection buses form ring network structure, and be provided with section breaker 21 between adjacent two regional power grid current collection buses 2, when electric equipment or line failure, faulty equipment or circuit are cut out rapidly from electric power system, guarantee the operation of fault-free equipment in electric power system.
In regional power grid current collection bus described in the utility model, arbitrary two current collection buses all adopt ring network structure to be connected, make the every typhoon group of motors institute electricity of wind energy turbine set have two passages to enter extraneous power distribution network, realize wind farm grid-connected redundancy feature, improved the reliable rate of wind energy turbine set; Adopt one main one for two voltage boosting transforming devices, when primary voltage boosting transforming device breaks down or overhauls, still have standby voltage boosting transforming device can maintain wind energy turbine set operation, strengthened system reliability.
The above is preferred implementation of the present utility model; for those skilled in the art; not departing under the prerequisite of the utility model principle, can also make some improvements and modifications, these improvements and modifications are also regarded as protection range of the present utility model.
Claims (3)
1. a wind farm grid-connected network topology structure, comprise wind-driven generator, regional power grid current collection bus, step-up transformer and extraneous power distribution network, it is characterized in that, also comprise grid-connected contactor, grid-connected switch and interconnection switch, described step-up transformer comprises primary voltage boosting transforming device and standby voltage boosting transforming device; Described wind-driven generator is connected successively after grid-connected contactor and grid-connected switch and is accessed regional power grid current collection bus, the two ends of described regional power grid current collection bus are connected with standby voltage boosting transforming device with primary voltage boosting transforming device respectively, and described primary voltage boosting transforming device and standby voltage boosting transforming device access extraneous power distribution network by interconnection switch respectively; All regional power grid current collection buses are connected in parallel between primary voltage boosting transforming device and standby voltage boosting transforming device, and any two regional power grid current collection buses form ring network structure.
2. a kind of wind farm grid-connected network topology structure according to claim 1, is characterized in that, also comprises current transformer, and described current transformer is connected between wind-driven generator and regional power grid current collection bus.
3. a kind of wind farm grid-connected network topology structure according to claim 1 and 2, is characterized in that, also comprises section breaker, and described section breaker is connected between adjacent two regional power grid current collection buses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420280998.0U CN203911500U (en) | 2014-05-29 | 2014-05-29 | Wind power plant grid-connected network topology structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420280998.0U CN203911500U (en) | 2014-05-29 | 2014-05-29 | Wind power plant grid-connected network topology structure |
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| CN203911500U true CN203911500U (en) | 2014-10-29 |
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| CN201420280998.0U Active CN203911500U (en) | 2014-05-29 | 2014-05-29 | Wind power plant grid-connected network topology structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017037640A1 (en) * | 2015-09-04 | 2017-03-09 | Alteneiji Hamad Musabeh Ahmed Saif | Enhancing collection of electrical power in an energy collection system |
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- 2014-05-29 CN CN201420280998.0U patent/CN203911500U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017037640A1 (en) * | 2015-09-04 | 2017-03-09 | Alteneiji Hamad Musabeh Ahmed Saif | Enhancing collection of electrical power in an energy collection system |
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