CN202014100U - Dynamic reactive power compensator for photovoltaic power station grid connected inverter - Google Patents
Dynamic reactive power compensator for photovoltaic power station grid connected inverter Download PDFInfo
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- CN202014100U CN202014100U CN2011201032158U CN201120103215U CN202014100U CN 202014100 U CN202014100 U CN 202014100U CN 2011201032158 U CN2011201032158 U CN 2011201032158U CN 201120103215 U CN201120103215 U CN 201120103215U CN 202014100 U CN202014100 U CN 202014100U
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- filter
- reactive power
- dynamic reactive
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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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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- 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
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Abstract
The utility model provides a dynamic reactive power compensator for a photovoltaic power station grid connected inverter, comprising a plurality of main breakers, a plurality of primary filter circuits, a plurality of inverter circuits and a step up transformer, which are electrically connected. The dynamic reactive power compensator is characterized in that the step up transformer is parallelly connected with one or more than one switching reactive power compensators in the front, and composed of three-phase compensating circuits connected in triangle, wherein each compensating circuit includes a filter reactor, a filter capacitor and an antiparallel thyristor group serially connected, and the switching reactive power compensators are accessed by secondary breakers. The switching reactive power compensators control the switching of the filter capacitor by the thyristor, each branch has an LC filter circuit composed of the filter reactor and the filter capacitor, thus filtering harmonic and compensating reactive power, therefore the aim of filtering harmonic, outputting stable power and improving power grid supply quality, and stable operation of a grid connected photovoltaic power generation system is ensured.
Description
Technical field
The utility model relates to a kind of photovoltaic electric station grid connection inverter dynamic reactive compensation device, belongs to the photovoltaic power generation grid-connecting technical field.
Background technology
Along with development of human society, the energy, environment become mankind nowadays survival and development pressing problem to be solved, will become the certainty of future development based on the energy resource structure of cleaning, regenerative resource.Solar energy more and more is subjected to people's attention as a kind of cleaning, non-pollution of renewable energy, in a sense, photovoltaic generation is one of renewable energy utilization technology that has most in the world at present exploitation value, photovoltaic generation fast development in recent years, being incorporated into the power networks of large-sized photovoltaic power station becomes the main flow of photovoltaic generation development.
Along with of the increase of photovoltaic generation electric weight in the electrical network ratio, the stable operation of grid-connected photovoltaic power generation system gets up to be subjected to more the attention of country and each province Utilities Electric Co., the inverter of big-and-middle-sized photovoltaic plant is owing to be made up of many little photovoltaic DC-to-AC converters, photovoltaic DC-to-AC converter uses a large amount of electronic components, direct current is converted in the process of interchange at inverter, can produce harmonic wave, three-phase current unbalance inevitably, the power output uncertainty easily causes voltage ripple of power network, flickering, the power grid quality after influence is incorporated into the power networks.
Summary of the invention
The purpose of this utility model is to provide a kind of photovoltaic electric station grid connection inverter dynamic reactive compensation device, can the filtering harmonic wave, compensating power, thus realize that power output is stable, improve grid supply quality, and guarantee the stable operation of grid-connected photovoltaic power generation system.
To achieve these goals, scheme of the present utility model is: a kind of photovoltaic electric station grid connection inverter dynamic reactive compensation device, comprise a plurality of main circuit breakers of electrical connection, a plurality of elementary filter circuit, a plurality of inverter circuit, a plurality of secondary filter circuit and step-up transformer, more than one switching reactive compensator also in parallel before step-up transformer, described switching reactive compensator is connected and composed by triangle by the three-phase compensating circuit, and every compensating circuit is made of filter reactor, filtering capacitor, the series connection of anti-parallel thyristor group; Described switching reactive compensator inserts through the inferior circuit breaker of crossing.
Further, the anti-parallel thyristor group is made of two thyristor reverse parallel connections.
Further, elementary filter circuit is made of two DC filter parallel connections.
Further, inverter circuit is the IGBT power model of three-phase.
Further, the secondary compensating circuit is the LCL filter circuit.
The beneficial effects of the utility model are: big-and-middle-sized photovoltaic plant is incorporated into the power networks after the change device that boosts boosts by a plurality of little photovoltaic plant parallel connections, each little photovoltaic plant inserts main circuit breaker, elementary filter circuit, inverter circuit, secondary filter circuit, dc circuit breaker comes deciliter photovoltaic electric current, DC filter comes the photovoltaic electric current is carried out elementary filtering, reaches the steady of photovoltaic current waveform; Send alternating voltage and electric current through the inverter inversion, come voltage and current is carried out secondary filtering by the LCL filter circuit again, be that voltage and current is smooth, be connected to the grid by step-up transformer, at this moment, incorporate switching reactive compensator in the step-up transformer into, the switching by thyristor control filtering capacitor of switching reactive compensator, every route filter reactor, filtering capacitor is formed the LC filter circuit, both can the filtering harmonic wave, and again can compensating power, thereby reach the filtering harmonic wave, the realization power output is stable, improves the purpose of grid supply quality, and guarantees the stable operation of grid-connected photovoltaic power generation system.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and the specific embodiments.
Know that by Fig. 1 photovoltaic electric station grid connection inverter dynamic reactive compensation device of the present utility model comprises a plurality of main circuit breakers 1 of electrical connection, a plurality of elementary filter circuit, a plurality of inverter circuit 3, a plurality of secondary filter circuit 4 and step-up transformer 6.Described elementary filter circuit is made of two DC filter 2 parallel connections, and described inverter circuit 3 is the IGBT power model of three-phase, and described secondary compensating circuit 4 is the LCL filter circuit.The switching reactive compensator that inserts also in parallel before step-up transformer 6, described switching reactive compensator is connected and composed by triangle by the three-phase compensating circuit, and every compensating circuit is made of filter reactor 8, filtering capacitor 9,10 series connection of anti-parallel thyristor group; Described anti-parallel thyristor group 10 is made of two thyristor reverse parallel connections, and switching reactive compensator inserts through time circuit breaker 7.
Claims (5)
1. photovoltaic electric station grid connection inverter dynamic reactive compensation device, comprise a plurality of main circuit breakers of electrical connection, a plurality of elementary filter circuit, a plurality of inverter circuit, a plurality of secondary filter circuit and step-up transformer, it is characterized in that: more than one switching reactive compensator also in parallel before the described step-up transformer, described switching reactive compensator is connected and composed by triangle by the three-phase compensating circuit, and every compensating circuit is made of filter reactor, filtering capacitor, the series connection of anti-parallel thyristor group; Described switching reactive compensator inserts through time circuit breaker.
2. photovoltaic electric station grid connection inverter dynamic reactive compensation device according to claim 1 is characterized in that: described anti-parallel thyristor group is made of two thyristor reverse parallel connections.
3. photovoltaic electric station grid connection inverter dynamic reactive compensation device according to claim 1 is characterized in that: described elementary filter circuit is made of two DC filter parallel connections.
4. photovoltaic electric station grid connection inverter dynamic reactive compensation device according to claim 1 is characterized in that: described inverter circuit is the IGBT power model of three-phase.
5. photovoltaic electric station grid connection inverter dynamic reactive compensation device according to claim 1 is characterized in that: described secondary compensating circuit is the LCL filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201032158U CN202014100U (en) | 2011-04-11 | 2011-04-11 | Dynamic reactive power compensator for photovoltaic power station grid connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201032158U CN202014100U (en) | 2011-04-11 | 2011-04-11 | Dynamic reactive power compensator for photovoltaic power station grid connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202014100U true CN202014100U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201032158U Expired - Fee Related CN202014100U (en) | 2011-04-11 | 2011-04-11 | Dynamic reactive power compensator for photovoltaic power station grid connected inverter |
Country Status (1)
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| CN (1) | CN202014100U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518571A (en) * | 2011-12-29 | 2012-06-27 | 中国华能集团清洁能源技术研究院有限公司 | Large-sized integrated utilization system for photo-thermal power generating station and photovoltaic power generating station |
| CN104716653A (en) * | 2013-12-11 | 2015-06-17 | 国网上海市电力公司 | Reactive compensation system |
| CN104901525A (en) * | 2015-06-30 | 2015-09-09 | 中国电力工程顾问集团华东电力设计院有限公司 | Soft-start pre-assembly substation room |
| CN108767861A (en) * | 2018-04-03 | 2018-11-06 | 湖南大学 | Dispersion and concentration applied to photovoltaic plant mutually coordinates two stage filter implementation method |
-
2011
- 2011-04-11 CN CN2011201032158U patent/CN202014100U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518571A (en) * | 2011-12-29 | 2012-06-27 | 中国华能集团清洁能源技术研究院有限公司 | Large-sized integrated utilization system for photo-thermal power generating station and photovoltaic power generating station |
| CN104716653A (en) * | 2013-12-11 | 2015-06-17 | 国网上海市电力公司 | Reactive compensation system |
| CN104901525A (en) * | 2015-06-30 | 2015-09-09 | 中国电力工程顾问集团华东电力设计院有限公司 | Soft-start pre-assembly substation room |
| CN108767861A (en) * | 2018-04-03 | 2018-11-06 | 湖南大学 | Dispersion and concentration applied to photovoltaic plant mutually coordinates two stage filter implementation method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: HE NAN TIANCHUANG NEW ENERGY EQUIPMENT CO., LTD. Free format text: FORMER NAME: HE NAN TIANCHUANG WIND POWER EQUIPMENT CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 454950 industrial agglomeration area, Wuzhi County, Henan, Jiaozuo Patentee after: Henan Tianchuang New Energy Equipment Co.,Ltd. Address before: 454950 industrial agglomeration area, Wuzhi County, Henan, Jiaozuo Patentee before: Henan Tianchuang Windpower Equipment Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111019 Termination date: 20140411 |