CN101826837A - Variable frequency control power module of wind power generator - Google Patents
Variable frequency control power module of wind power generator Download PDFInfo
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- CN101826837A CN101826837A CN201010199028A CN201010199028A CN101826837A CN 101826837 A CN101826837 A CN 101826837A CN 201010199028 A CN201010199028 A CN 201010199028A CN 201010199028 A CN201010199028 A CN 201010199028A CN 101826837 A CN101826837 A CN 101826837A
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Abstract
The invention relates to a doubly-fed variable frequency control power module structure of a wind power generator. Aiming at the high failure rate caused by an electrical structure of the traditional variable frequency control power module of a wind power generator, a doubly-fed variable frequency control power module of a wind power generator is disclosed, which comprises a converter, a positive DC (Direct Current) busbar, a negative DC busbar, an interconnecting busbar and an AC (Alternating Current) busbar. The positive DC busbar and the negative DC busbar are used for transferring DC, the AC busbar is used for transferring AC, the interconnecting busbar is used for electrical connection of a filter circuit; the converter is connected with the positive DC busbar, the negative DC busbar and the AC busbar, and the positive DC busbar and the negative DC busbar respectively consist of two DC conducting plates which are piled up and isolated by insulating materials. The invention is mainly used for variable frequency control of a large-power wind power generator, and has the advantages of simple and reliable electrical connection, convenient installation and practicality.
Description
Technical field
The present invention relates to the wind-driven generator frequency conversion control technique, particularly double-fed wind power generator variable frequency control power model structure.
Background technology
Along with the fast development of China's wind power generation cause, pure, the free of contamination electric energy that wind power generation brought, the proportion in China's generating total amount is increasing.Dual-feed asynchronous wind power generator is the main flow equipment of high-power wind-driven generator, and its frequency converter comprises control system, two back-to-back ac-dc-ac transform devices and filter circuit (being referred to as power model) etc.When dual-feed asynchronous wind power generator was in the metasynchronism running status, first converter that is connected with electrical network by the interchange busbar received the three-phase alternating current of electrical network through handing over-straight the conversion to DC master row (comprising positive direct-current busbar and negative DC master row) transmission direct current.Second converter that is connected with wind-driven generator by the interchange busbar is converted to three-phase alternating current with direct current, provides the AC excitation electric current to wind power generator rotor, and at this moment frequency converter will consume the electrical network energy as the electrical network load.When dual-feed asynchronous wind power generator is in supersynchronous running status, second converter that is connected with wind-driven generator receives the three-phase alternating current of wind-driven generator output, through handing over-straight the conversion to DC master row transmission direct current, first converter that is connected with electrical network is converted to three-phase alternating current to the electrical network feed with direct current, and at this moment frequency converter provides electric energy to electrical network.This dual-feed asynchronous wind power generator frequency changer complexity, connecting line is numerous.As the frequency converter of wind power generation core component, serious always for many years dependence on import.Wind turbine generator to reliability require high, require the requirement that meets national grid of the electric energy strictness of output, guarantee the operation that wind turbine generator can be good, frequency converter is as the control device of wind turbine generator, its quality is directly connected to the wind turbine generator reliability of operation, have important effect, the design of power model is particularly necessary especially.
At home and abroad current, the power model technology of low power fan frequency converter is ripe day by day, and its product is also more, and is applied to high-powerly, and especially the more abominable product of environment is very few, and the price of the product of import is very high.The reliability of high-power power model, electric insulation, protective circuit, life-span etc. have relatively high expectations; the environment of wind-powered electricity generation frequency converter operation is very abominable in addition; therefore strict more to the requirement of its power model, the high power module of high reliability is a bottleneck of wind-powered electricity generation frequency converter industry.Fault from current wind-powered electricity generation frequency converter appearance, because the unreasonable situation of burning that causes of design of power model often takes place, the high-power wind-driven generator of MW class particularly, kilovolt on the power model direct-current working volts, electric current reaches several kiloamperes, and power model is operated in the high frequency state, distributed constant to the power model electrical structure, particularly distributed inductance is very responsive, and it is improper to connect up in the electrical structure, usually is the key factor that causes the power model fault even burn.
Summary of the invention
Technical problem to be solved by this invention, be exactly at the prior art variable frequency control power module of wind power generator, the shortcoming that the failure rate that electrical structure causes is high, a kind of double-fed wind power generator variable frequency control power model is provided, by improving the electrical structure of AC/DC busbar, improve the reliability of system.
The present invention further will exchange busbar and DC master row combines, and has further improved system reliability, has simplified installation steps.
The present invention will be used for also that filter circuit is electrically connected in the middle of connect busbar and DC master row is integrated, constitute composite bus bar of the present invention.
The present invention solve the technical problem, and the technical scheme of employing is that variable frequency control power module of wind power generator comprises converter, positive direct-current busbar, negative DC master row middle connection busbar and exchanges busbar; Described positive direct-current busbar and negative DC master row are used to transmit direct current; Described interchange busbar is used to transmit alternating current; Connect busbar in the middle of described and be used for being electrically connected of filter circuit; Described converter and positive direct-current busbar are with negative DC master row and exchange busbar and be connected, and according to the instruction of control system, finish the conversion of alternating current to direct current or direct current to alternating current; It is characterized in that described positive direct-current busbar and negative DC master row are made of two conductive media plates that stack respectively, are isolated by insulating material between two conductive media plates.
Described insulating material is the coat of described conductive media plate.
Described interchange busbar is made of the ac conduction plate that overlays on the conductive media plate, is isolated by insulating material between described ac conduction plate and the conductive media plate.
Described insulating material is the coat on ac conduction plate and/or the conductive media plate.
Connect busbar in the middle of described and constitute, isolate by insulating material between described connecting plate and the conductive media plate by the connecting plate that overlays on the conductive media plate.
Described insulating material is the coat on connecting plate and/or the conductive media plate.
Described negative DC master row is positioned at positive direct-current busbar top.
Described negative DC master row ground connection.
Described filter circuit comprises two branch roads that are connected in parallel between positive direct-current busbar and the negative DC master row, and each branch road is made of 3 capacitances in series respectively, every electric capacity resistance in parallel.
Connect busbar in the middle of described and constitute, be respectively applied for the intermediate node that connects two branch roads by two connecting plates.
The invention has the beneficial effects as follows the composite bus bar that only uses sheet material that a multilayer stacks to constitute, just filter capacitor, divider resistance, surging being absorbed parts such as electric capacity, IGBT (insulated gate bipolar transistor) module is connected together, saved a lot of link leads, be electrically connected succinctly reliably practicality easy for installation.Alternating current-direct current composite bus bar of the present invention, the electric current contact-making surface is big, greatly reduces stray inductance, and security of system improves, and prolong useful life.
Description of drawings
Fig. 1 is unidirectional single-ended power model structural representation;
Fig. 2 is the composite bus bar structural representation;
Fig. 3 is the circuit theory diagrams of unidirectional single-ended power model;
Fig. 4 is complete three phase power modular circuit schematic diagram.
Among the figure: 1-wind-powered electricity generation frequency converter high power module; The 2-drive plate; The 3-IGBT module; The 4-composite bus bar; 5, positive direct-current busbar; 6-bears DC master row; Connect busbar in the middle of the 7-; 8-exchanges busbar; 9-filter capacitor support; The 10-radiator; The high withstand voltage insulation board of 11-; The 12-filter capacitor; The 13-surging absorbs electric capacity; The 14-divider resistance; 50-positive direct-current busbar exit; 60-bears the DC master row exit; The 56-insulating material; 80-exchanges the busbar exit.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The conducting plate formation composite bus bar that the present invention's employing stacks (comprising the conductive media plate that constitutes positive direct-current busbar and negative DC master row, the ac conduction plate that constitutes the interchange busbar and the middle connecting plate that is connected busbar of formation), filter capacitor, surging are absorbed devices such as electric capacity, IGBT module to link together, the construction unit of composition moduleization, be electrically connected succinct reliable, easy for installation, flexible configuration.
Embodiment
Referring to Fig. 1 and Fig. 2, variable frequency control power module of wind power generator of the present invention comprises converter, positive direct-current busbar 5, negative DC master row 6, the middle connection busbar 7 that two IGBT modules constitute and exchanges busbar 8 etc.Positive direct-current busbar 5 and negative DC master row 6 are made of two conductive media plates that stack respectively, are isolated by insulating material 56 between two conductive media plates, are used to transmit direct current, and its exit is labeled as 50 and 60 respectively.Exchange busbar 8 and be used to transmit alternating current, its exit is labeled as 80.The middle mother of connection 7 arranges and is used for being electrically connected of filter circuit.Two IGBT module dc terminal are connected on respectively on positive direct-current busbar 5 and the negative DC master row 6, exchanging end is connected in parallel on the interchange busbar 8, its control end (grid of IGBT) is connected with control system, two IGBT modules are according to the instruction of control system, finish the conversion (referring to circuit diagram 3) of alternating current to direct current or direct current to alternating current.
Unidirectional single-ended power model construction unit schematic diagram shown in Fig. 1, concrete installation method is as follows:
Fig. 2 shows the structure of this routine composite bus bar 4, negative DC master row 6 is positioned at positive direct-current busbar 5 tops, insulating material between positive direct-current busbar and the negative DC master row can be the insulation coatings or the coat of conductive media plate, also can between two conductive media plates, press from both sides one deck insulating sheet material, improve dielectric strength.Among Fig. 2, exchanging busbar 8 is made of the ac conduction plate that overlays on the negative DC master row, isolated by insulating material between ac conduction plate and the conductive media plate, the insulating material here also can be insulation coatings or the coat on ac conduction plate and/or the conductive media plate.Connect busbar 7 in the middle of this example and constitute, isolate by insulating material between connecting plate and the conductive media plate by the connecting plate that overlays the negative DC master row other end.The insulating material here can be insulation coatings or the coat on connecting plate and/or the conductive media plate equally.In this structure, the negative general ground connection of DC master row can be played shielding action, improves system's antijamming capability.
Fig. 3 shows the circuit theory diagrams of this routine module, among the figure, filter circuit comprises two branch roads that are connected in parallel between positive direct-current busbar and the negative DC master row, and each branch road is made of 12 series connection of 3 filter capacitors respectively, every filter capacitor 12 divider resistances 14 in parallel.By the resistance of choose reasonable divider resistance 14, can satisfy the filter capacitor requirement of withstand voltage, filter capacitor is protected.Connect busbar 7 in the middle of this example and constitute, be respectively applied for the intermediate node that connects two branch roads by two connecting plates.Among Fig. 3, IGBT module 3 comprises two IGBT, and two IGBT module 3 parallel operations can improve current load ability.Fig. 3 only shows the circuit structure of unidirectional single-ended power model, and Fig. 4 has provided complete three phase power modular circuit schematic diagram, and circuit structure is a symmetry axis with O-O ' in scheming, about two partly have tangible symmetrical structure.U, the V of O-O ' left side converter, W three-phase alternating current end are used to connect electrical network or double-fed wind power generator, and A, the B of O-O ' the right converter, C three-phase alternating current end then are used to connect double-fed wind power generator or electrical network.As can be seen, adopt 3 these routine power model parallel connections to be connected back-to-back with the power model of other 3 parallel connections again, can be combined into complete three phase power module shown in Figure 4 easily.
Claims (10)
1. variable frequency control power module of wind power generator comprises converter, positive direct-current busbar, negative DC master row, middle connection busbar and exchanges busbar; Described positive direct-current busbar and negative DC master row are used to transmit direct current; Described interchange busbar is used to transmit alternating current; Connect busbar in the middle of described and be used for being electrically connected of filter circuit; Described converter and positive direct-current busbar are with negative DC master row and exchange busbar and be connected, and according to the instruction of control system, finish the conversion of alternating current to direct current or direct current to alternating current; It is characterized in that described positive direct-current busbar and negative DC master row are made of two conductive media plates that stack respectively, are isolated by insulating material between two conductive media plates.
2. variable frequency control power module of wind power generator according to claim 1 is characterized in that, described insulating material is the coatings or the coat of described conductive media plate.
3. variable frequency control power module of wind power generator according to claim 1 and 2 is characterized in that, described interchange busbar is made of the ac conduction plate that overlays on the conductive media plate, is isolated by insulating material between described ac conduction plate and the conductive media plate.
4. variable frequency control power module of wind power generator according to claim 3 is characterized in that, described insulating material is coatings or the coat on ac conduction plate and/or the conductive media plate.
5. according to any described variable frequency control power module of wind power generator of claim 1～4, it is characterized in that, connect busbar in the middle of described and constitute, isolate by insulating material between described connecting plate and the conductive media plate by the connecting plate that overlays on the conductive media plate.
6. variable frequency control power module of wind power generator according to claim 5 is characterized in that, described insulating material is coatings or the coat on connecting plate and/or the conductive media plate.
7. according to any described high-power wind-driven generator variable frequency control module of claim 1～6, it is characterized in that described negative DC master row is positioned at positive direct-current busbar top.
8. variable frequency control power module of wind power generator according to claim 7 is characterized in that, described negative DC master row ground connection.
9. according to any described variable frequency control power module of wind power generator of claim 1～8, it is characterized in that, described filter circuit comprises two branch roads that are connected in parallel between positive direct-current busbar and the negative DC master row, each branch road is made of 3 capacitances in series respectively, every electric capacity resistance in parallel.
10. variable frequency control power module of wind power generator according to claim 9 is characterized in that, the described middle busbar that connects is made of two connecting plates, is respectively applied for the intermediate node that connects two branch roads.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010199028A CN101826837A (en) | 2010-06-12 | 2010-06-12 | Variable frequency control power module of wind power generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010199028A CN101826837A (en) | 2010-06-12 | 2010-06-12 | Variable frequency control power module of wind power generator |
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| CN101826837A true CN101826837A (en) | 2010-09-08 |
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| CN201010199028A Pending CN101826837A (en) | 2010-06-12 | 2010-06-12 | Variable frequency control power module of wind power generator |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624205A (en) * | 2012-04-16 | 2012-08-01 | 株洲南车时代电气股份有限公司 | Power module of converter |
| CN103078476A (en) * | 2013-01-28 | 2013-05-01 | 济宁圣电电子有限公司 | Modular frequency converter |
| CN103514982A (en) * | 2013-10-11 | 2014-01-15 | 国家电网公司 | Overlapped busbar applied to high-power tri-level medium-voltage wind power converter |
| CN103872924A (en) * | 2014-02-21 | 2014-06-18 | 航天科工海鹰集团有限公司 | Variable frequency controller and anti-explosion variable frequency motor with same |
| CN103915738A (en) * | 2013-01-07 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Composite busbar and three-phase inverter circuit |
| CN103916033A (en) * | 2013-01-07 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Single-phase inverter circuit |
| CN105262325A (en) * | 2015-11-05 | 2016-01-20 | 许继集团有限公司 | Crimping-type IEGT power module for large-power offshore wind power |
| CN106583910A (en) * | 2017-01-06 | 2017-04-26 | 深圳市德知拓电源技术有限公司 | Ultrasonic welding power supply |
| EP3404818A1 (en) * | 2017-05-15 | 2018-11-21 | Siemens Aktiengesellschaft | Semiconductor circuit assembly |
| CN109004854A (en) * | 2018-07-26 | 2018-12-14 | 国网新源张家口风光储示范电站有限公司 | A kind of power module architectures and current transformer |
| US20220345027A1 (en) * | 2021-04-21 | 2022-10-27 | Siemens Mobility GmbH | Circuit arrangement for a current converter |
-
2010
- 2010-06-12 CN CN201010199028A patent/CN101826837A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102624205A (en) * | 2012-04-16 | 2012-08-01 | 株洲南车时代电气股份有限公司 | Power module of converter |
| CN102624205B (en) * | 2012-04-16 | 2014-03-12 | 株洲南车时代电气股份有限公司 | Power module of converter |
| CN103915738B (en) * | 2013-01-07 | 2016-05-04 | 永济新时速电机电器有限责任公司 | Composite bus bar and three-phase inverting circuit |
| CN103915738A (en) * | 2013-01-07 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Composite busbar and three-phase inverter circuit |
| CN103916033A (en) * | 2013-01-07 | 2014-07-09 | 永济新时速电机电器有限责任公司 | Single-phase inverter circuit |
| CN103078476B (en) * | 2013-01-28 | 2015-11-18 | 济宁圣电电子有限公司 | Modular frequency converter |
| CN103078476A (en) * | 2013-01-28 | 2013-05-01 | 济宁圣电电子有限公司 | Modular frequency converter |
| CN103514982B (en) * | 2013-10-11 | 2017-01-25 | 国家电网公司 | Overlapped busbar applied to high-power tri-level medium-voltage wind power converter |
| CN103514982A (en) * | 2013-10-11 | 2014-01-15 | 国家电网公司 | Overlapped busbar applied to high-power tri-level medium-voltage wind power converter |
| CN103872924A (en) * | 2014-02-21 | 2014-06-18 | 航天科工海鹰集团有限公司 | Variable frequency controller and anti-explosion variable frequency motor with same |
| CN103872924B (en) * | 2014-02-21 | 2017-02-22 | 航天科工海鹰集团有限公司 | Variable frequency controller and anti-explosion variable frequency motor with same |
| CN105262325A (en) * | 2015-11-05 | 2016-01-20 | 许继集团有限公司 | Crimping-type IEGT power module for large-power offshore wind power |
| CN106583910A (en) * | 2017-01-06 | 2017-04-26 | 深圳市德知拓电源技术有限公司 | Ultrasonic welding power supply |
| EP3404818A1 (en) * | 2017-05-15 | 2018-11-21 | Siemens Aktiengesellschaft | Semiconductor circuit assembly |
| WO2018210506A1 (en) * | 2017-05-15 | 2018-11-22 | Siemens Aktiengesellschaft | Semiconductor switching arrangement |
| CN110622407A (en) * | 2017-05-15 | 2019-12-27 | 西门子交通有限公司 | Semiconductor switch device |
| CN110622407B (en) * | 2017-05-15 | 2021-08-10 | 西门子交通有限公司 | Semiconductor switch device |
| US11424690B2 (en) * | 2017-05-15 | 2022-08-23 | Siemens Mobility GmbH | Semiconductor switching arrangement |
| CN109004854A (en) * | 2018-07-26 | 2018-12-14 | 国网新源张家口风光储示范电站有限公司 | A kind of power module architectures and current transformer |
| US20220345027A1 (en) * | 2021-04-21 | 2022-10-27 | Siemens Mobility GmbH | Circuit arrangement for a current converter |
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Application publication date: 20100908 |