CN102957326A - Modularized structure for three-level inverter for wind power generation - Google Patents
Modularized structure for three-level inverter for wind power generation Download PDFInfo
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- CN102957326A CN102957326A CN2012104921552A CN201210492155A CN102957326A CN 102957326 A CN102957326 A CN 102957326A CN 2012104921552 A CN2012104921552 A CN 2012104921552A CN 201210492155 A CN201210492155 A CN 201210492155A CN 102957326 A CN102957326 A CN 102957326A
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Abstract
The invention discloses a modularized structure for a three-level inverter for wind power generation, which can simply and quickly form different power levels for wind power generation. The modularized structure comprises an electrical system and a radiating system, wherein the electrical system comprises four direct current capacitors, four IGBTs (Insulated Gate Bipolar Translators), two clamping diodes, two absorption capacitors, a balancing resistor and bus bars; the radiating system comprises a water-cooling base plate and an air water-heat exchanger; a cooling water channel is arranged inside the water cooling base plate; and a water inlet and a water outlet which are connected with the air water-heat exchanger are arranged on in the lower end surface of the water-cooling base plate; the bus bars comprise a direct current capacitor bus bar which is arranged above the water-cooling base plate and a converter loop bus bar which is vertically connected with the direct-current capacitor bus bar, and arranged in front of the water-cooling base plate in parallel; the four direct current capacitors are arranged below the direct current capacitor bus bar, and the wiring terminals of the four direct current capacitors are connected with the direct current capacitor bus bar; the four IGBTs and the two clamping diodes are fixedly arranged on the water-cooling base plate; and the wiring terminals of the four IGBTs and the two clamping diodes and the wiring terminal of the balancing resistor are connected with the converter loop bus bar.
Description
Technical field
The present invention relates to a kind of power device, be specifically related to a kind of modular construction of the three-level current transformer for wind power generation.
Background technology
Along with the development and progress of wind generating technology, for the consideration of economy, current wind-powered electricity generation single-machine capacity is more and more higher, and the current transformer power that therefore drives wind-driven generator is also more and more higher.In order to improve the efficient of whole system, reduce the thermal losses of system simultaneously, powerful wind generator system is tending towards adopting the electric pressure of mesohigh.Development level in view of the current power electronic device, if continue to adopt the topological structure of two level, need the series connection of many power electronic device in the mesohigh occasion, and the voltage-sharing of the Static and dynamic of series connection power electronic device solves relatively difficulty, thereby reduces the reliability of whole system.Three level topological structures have successfully solved the problem of all pressing, so that the power electronic device of low-voltage-grade becomes possibility in the application of mesohigh converter system owing to adopted clamping diode or clamping capacitance.Since the level of clamping capacitance control more complicated in the three capacitor-clamped level topologys, the three level structures that adopt diode clamp in the current application more.
Along with the development of power electronic technology, the power density of module is more and more higher, and this just requires to provide preferably radiating mode to device, to satisfy the condition of its trouble free service.In powerful converter system, because the caloric value of power electronic device is larger, usually adopt water-filled radiator.Water-filled radiator is that switching frequency, current curve, maximum junction temperature and the pyroconductivity according to device carried out rational deployment, takes away the heat of device by the mixture of water and ethylene glycol.
Summary of the invention
The objective of the invention is to overcome the defective of prior art, a kind of modular construction of the three-level current transformer for wind power generation is provided, it can set up three level rectifyings, the inversion system of different capacity grade simply, quickly, is convenient to the maintenance and expansion of system.
The technical scheme that realizes above-mentioned purpose is: a kind of modular construction of the three-level current transformer for wind power generation, comprise electrical system and cooling system, described electrical system comprises four direct current capacitors, four IGBT, two clamping diodes, two Absorption Capacitances, balance resistance and busbar, described cooling system comprises a water-cooling base plate and air to water heat exchanger, wherein
The inside of described water-cooling base plate is provided with cooling-water duct, and the lower surface of this water-cooling base plate is provided with and cooling-water duct water inlet and delivery port that be communicated with and that be connected with described air to water heat exchanger;
Described busbar comprises that level is arranged on the dc capacitor busbar of described water-cooling base plate top and is vertically connected on the front end of dc capacitor busbar and is arranged on abreast the commutation circuit busbar in described water-cooling base plate the place ahead to ground;
Described four direct current capacitors are located at the below of described dc capacitor busbar abreast, and the binding post of these four direct current capacitors is connected with the lip-deep connecting hole of described dc capacitor busbar correspondingly;
Described four IGBT and two clamping diodes are close to the surface of described water-cooling base plate and are fixed on the described water-cooling base plate;
The binding post of the binding post of the binding post of the binding post of described four IGBT, two clamping diodes, two Absorption Capacitances and a balance resistance is connected with the lip-deep connecting hole of described commutation circuit busbar correspondingly.
The technical scheme of the modular construction of the three-level current transformer for wind power generation of the present invention, the needed electric component of wind electric converter and cooling system have been integrated, make it modularization, can set up simply, quickly three level rectifyings, the inversion system of different capacity grade, be convenient to the maintenance and expansion of system.The present invention is conducive to the Redundancy Design of system, helps to improve the reliability of system; Be convenient to the installation and maintenance of system, enhance productivity; Be beneficial to the expansion of system, avoided simultaneously the repetitive operation in the R﹠D process.
Description of drawings
Fig. 1 is the schematic diagram that is used for the single-phase three-level current transformer of wind power generation;
Fig. 2 is the perspective view of the modular construction of the three-level current transformer for wind power generation of the present invention;
Fig. 3 is the structural representation of the water-cooling base plate among the present invention.
Embodiment
In order to make those skilled in the art can understand better technical scheme of the present invention, below in conjunction with accompanying drawing its embodiment is described in detail:
See also Fig. 1, the single-phase three-level current transformer that is used for wind power generation comprises that four direct current capacitor C1～C4, four have respectively the IGBTS1～S4 of inverse parallel fly-wheel diode, two clamping diode D1, D2, two Absorption Capacitance CS1, CS2 and a balance resistance R.By two direct current capacitor C1, C2 and be unified into one group, by other two direct current capacitor C3 and C4 and be unified into one group, then two groups of series connection consist of the three level DC side of positive level, zero level and negative level.Four IGBTS1, S2, S3, S4 connect successively, and the collector electrode of IGBTS1 is connected with direct current positive bus DC+, and the emission collection of IGBTS4 is connected with direct current negative busbar DC-, and the connecting line of IGBTS2 and IGBTS3 is for exchanging I/O end AC.Absorption Capacitance CS1 is installed between the direct current positive bus DC+ between the IGBT of four series connection S1～S4 and two groups of direct current capacitors of connecting and the direct current center line DC0, Absorption Capacitance CS2 is installed between direct current center line DC0 and the direct current negative busbar DC-.In parallel with balance resistance R after two clamping diode D1, D2 series connection, and jointly be connected in parallel between the collector electrode of the emission collection of IGBTS1 and IGBTS4, the anode of clamping diode D1 is connected with direct current center line DC0 with the negative electrode of clamping diode D2, like this with regard to the single-phase tri-level circuit of complete.
See also Fig. 2, the modular construction of the three-level current transformer for wind power generation of the present invention comprises electrical system and cooling system, wherein,
Electrical system comprises four direct current capacitor C1～C4, four IGBT S1～S4, two clamping diode D1, D2, two Absorption Capacitance CS1, CS2, balance resistance R and busbar;
Cooling system comprises a water-cooling base plate 1 and air to water heat exchanger, the inside of this water-cooling base plate 1 is provided with cooling-water duct 10, the lower surface of this water-cooling base plate 1 is provided with water inlet 11 and the delivery port 12 that is communicated with cooling-water duct, and water inlet 11 is connected with delivery port and is located at outside air to water heat exchanger and is connected;
Busbar comprise level be arranged on to ground water-cooling base plate 1 the top dc capacitor busbar 2 and be vertically connected on the front end of dc capacitor busbar 2 and be set in parallel in the commutation circuit busbar 3 in the place ahead of water-cooling base plate 1;
Four direct current capacitor C1～C4 are located at the below of dc capacitor busbar 2 abreast, and the terminals of these four direct current capacitor C1～C4 are connected with dc capacitor busbar 2 lip-deep connecting holes correspondingly;
Four IGBT S1～S4 and two clamping diode D1, D2 are close to the surface of water-cooling base plate 1 and are fixed by screws in (see figure 3) on the water-cooling base plate 1, and four IGBT S1～S4 and two clamping diode D1, D2 are well dispelled the heat;
The terminals of the binding post of the binding post of the binding post of four IGBT S1～S4, two clamping diode D1, D2, two Absorption Capacitance CS1, CS2 and a balance resistance R are connected with commutation circuit busbar 3 lip-deep connecting holes correspondingly.
The setting of commutation circuit busbar 3 is mainly the stray inductance that reduces commutation circuit, and leaves interchange I/O end, can connect the output/input of AC network or alternating current machine.
The modular construction of the three-level current transformer for wind power generation of the present invention, the needed electric component of current transformer and cooling system have been integrated, make it modularization, can set up simply, quickly three level rectifyings, the inversion system of different capacity grade, be convenient to the maintenance and expansion of system.
The modular construction of the three-level current transformer for wind power generation of the present invention is conducive to the Redundancy Design of system, helps to improve the reliability of system; Be convenient to the installation and maintenance of system, enhance productivity; Be beneficial to the expansion of system, avoided simultaneously the repetitive operation in the R﹠D process.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (1)
1. modular construction that is used for the three-level current transformer of wind power generation, comprise electrical system and cooling system, described electrical system comprises four direct current capacitors, four IGBT, two clamping diodes, two Absorption Capacitances, balance resistance and busbar, described cooling system comprises a water-cooling base plate and air to water heat exchanger, it is characterized in that
The inside of described water-cooling base plate is provided with cooling-water duct, and the lower surface of this water-cooling base plate is provided with and cooling-water duct water inlet and delivery port that be communicated with and that be connected with described air to water heat exchanger;
Described busbar comprises that level is arranged on the dc capacitor busbar of described water-cooling base plate top and is vertically connected on the front end of dc capacitor busbar and is arranged on abreast the commutation circuit busbar in described water-cooling base plate the place ahead to ground;
Described four direct current capacitors are located at the below of described dc capacitor busbar abreast, and the binding post of these four direct current capacitors is connected with the lip-deep connecting hole of described dc capacitor busbar correspondingly;
Described four IGBT and two clamping diodes are close to the surface of described water-cooling base plate and are fixed on the described water-cooling base plate;
The binding post of the binding post of the binding post of the binding post of described four IGBT, two clamping diodes, two Absorption Capacitances and a balance resistance is connected with the lip-deep connecting hole of described commutation circuit busbar correspondingly.
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| CN2012104921552A CN102957326A (en) | 2012-11-27 | 2012-11-27 | Modularized structure for three-level inverter for wind power generation |
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| CN2012104921552A CN102957326A (en) | 2012-11-27 | 2012-11-27 | Modularized structure for three-level inverter for wind power generation |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113192A (en) * | 2014-06-24 | 2014-10-22 | 许继电气股份有限公司 | IGBT three-level power module |
| CN104158421A (en) * | 2014-04-25 | 2014-11-19 | 中国人民解放军海军工程大学 | Diode clamped three-level converter |
| CN104201866A (en) * | 2014-09-16 | 2014-12-10 | 北京金自天正智能控制股份有限公司 | Insulated gate bipolar transistor three-level power cabinet |
| CN104242683A (en) * | 2014-09-16 | 2014-12-24 | 北京金自天正智能控制股份有限公司 | Insulated gate bipolar transistor NPC/H bridge inversion power module |
| CN104953857A (en) * | 2015-06-18 | 2015-09-30 | 国电南瑞科技股份有限公司 | Power unit of IEGT (Injection Enhanced Gate Transistor)-based high-power tri-level converter |
| CN105186889A (en) * | 2015-08-21 | 2015-12-23 | 永济新时速电机电器有限责任公司 | Combination water cooling power apparatus with overvoltage absorption function |
| CN105634293A (en) * | 2016-02-02 | 2016-06-01 | 浙江海得新能源有限公司 | Diode-clamped three-level converter and power system therefor |
| CN106329955A (en) * | 2016-10-25 | 2017-01-11 | 中车永济电机有限公司 | High integration level metro traction chopper power module |
| CN110323954A (en) * | 2019-08-08 | 2019-10-11 | 中车青岛四方车辆研究所有限公司 | Three level traction power modules and inverter circuit based on SiC power device |
| CN111338246A (en) * | 2020-03-02 | 2020-06-26 | 上海电气集团股份有限公司 | High-precision time synchronization control system of wind power converter |
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| CN104953857A (en) * | 2015-06-18 | 2015-09-30 | 国电南瑞科技股份有限公司 | Power unit of IEGT (Injection Enhanced Gate Transistor)-based high-power tri-level converter |
| CN105186889A (en) * | 2015-08-21 | 2015-12-23 | 永济新时速电机电器有限责任公司 | Combination water cooling power apparatus with overvoltage absorption function |
| CN105634293A (en) * | 2016-02-02 | 2016-06-01 | 浙江海得新能源有限公司 | Diode-clamped three-level converter and power system therefor |
| CN106329955A (en) * | 2016-10-25 | 2017-01-11 | 中车永济电机有限公司 | High integration level metro traction chopper power module |
| CN106329955B (en) * | 2016-10-25 | 2018-08-21 | 中车永济电机有限公司 | High integration metro traction chopped power module |
| CN110323954A (en) * | 2019-08-08 | 2019-10-11 | 中车青岛四方车辆研究所有限公司 | Three level traction power modules and inverter circuit based on SiC power device |
| CN111338246A (en) * | 2020-03-02 | 2020-06-26 | 上海电气集团股份有限公司 | High-precision time synchronization control system of wind power converter |
| CN111338246B (en) * | 2020-03-02 | 2021-04-13 | 上海电气集团股份有限公司 | High-precision time synchronization control system of wind power converter |
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Application publication date: 20130306 |