CN103973130A - Rectification and inversion module of doubly-fed converter of integrated structure - Google Patents
Rectification and inversion module of doubly-fed converter of integrated structure Download PDFInfo
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- CN103973130A CN103973130A CN201410200374.8A CN201410200374A CN103973130A CN 103973130 A CN103973130 A CN 103973130A CN 201410200374 A CN201410200374 A CN 201410200374A CN 103973130 A CN103973130 A CN 103973130A
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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
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Abstract
The invention discloses a rectification and inversion module of a doubly-fed converter of an integrated structure. The rectification and inversion module comprises a rectification and inversion unit, a control unit, a drive unit and an auxiliary power source. The rectification and inversion unit conducts rectification buffering on input three-phase power and then conducts inversion on the three-phase power, so that the three-phase power is changed into a three-phase alternating current meeting the power grid requirement, the rectification and inversion unit also completes sampling of a direct-current voltage and the alternating current and transmits sampling information to the control unit. The control unit achieves communication data exchange with an upper computer. Communication data exchange with an upper computer comprises the steps that AD conversion is conducted on the sampled direct-current voltage and the sampled alternating current, preprocessing is completed through an FPGA, and then the pre-processed direct-current voltage and the pre-processed alternating current are sent to an external master controller and the upper computer, a command of the upper computer is read, and a PWM signal is generated and transmitted to the drive unit. The PWM signal is driven by the drive unit and then transmitted to the rectification and inversion unit. By the adoption of the rectification and inversion module of the doubly-fed converter of the integrated structure, design and manufacturing of a wind power converter can be simplified, and cost can be reduced; the rectification and inversion module can be suitable for the doubly-fed converter of the multiple-megawatt level.
Description
Technical field
The present invention relates to the double-feed current transformer in wind power technology field, particularly relate to a kind of commutation inversion module that the commutation inversion of double-feed current transformer is carried out to the double-feed current transformer of the integral structure of integrated design.
Background technology
Domestic wind electric converter research is to be all based upon on discrete electronic device basis mostly now; as power switch component, control circuit, protective circuit, sensing circuit etc.; these devices are all to carry out particular design by user's different purposes and requirement; the criteria of right and wrong device adopting, has a lot of deficiencies and shortcoming.Although prior art is also existing, modular wind electric converter research is based upon to commutation inversion and separates on modular basis, this modularized design still has certain disadvantages and is not enough.
Often the lead time is long, cost is high for discrete electronic device, it is dumb to use, and has greatly limited to a certain extent the development of power electronics.If wind electric converter application discrete device, once break down, will be difficult to pick out fault element, and very difficult in dismounting, increase preventive maintenance time, cause the waste of wind energy resources.Meanwhile, commutation inversion is separated to modularization, be greater than slightly the feature of net side for double-feed current transformer pusher side power, the parallel connection of power model has caused certain waste.In addition between commutation inversion module, the parasitic parameter of line can cause unnecessary trouble.
Summary of the invention
The deficiency existing for overcoming above-mentioned prior art, one of the present invention object is the commutation inversion module of the double-feed current transformer that a kind of integral structure is provided, it can simplify the Design and manufacture of wind electric converter, and reduces costs, applicable to other double-feed current transformer of many MW class.
Another object of the present invention is the commutation inversion module of the double-feed current transformer that a kind of integral structure is provided, and can simplify the maintenance work of the loaded down with trivial details inconvenience of wind electric converter, saves a large amount of preventive maintenance times.
The present invention's a object is again the commutation inversion module of the double-feed current transformer that a kind of integral structure is provided, and can reduce blower fan maintenance downtime, improves the utilance of wind field energy output.
For reaching above-mentioned and other object, the present invention proposes a kind of commutation inversion module of double-feed current transformer of integral structure, this module comprises commutation inversion unit, control unit, driver element, accessory power supply, this commutation inversion unit is to meet the three-phase alternating current that electrical network requires for the three-phase electricity of input being carried out to carry out inversion after rectification buffering again, and complete the sampling of direct voltage and alternating current and sample information is sent to this control unit, this control unit is in order to realize the communication data exchange between host computer, comprise and the direct voltage sampling and alternating current are carried out to AD conversion and complete and send to external piloting control device processed after preliminary treatment again to host computer with read host computer instruction and generate pwm signal and export to driver element by FPGA, by exporting again this commutation inversion unit after this drive unit drives to, this accessory power supply connects this commutation inversion unit, in order to produce the required direct voltage of this control unit.
Further, this commutation inversion unit comprises and at least comprises IGBT module (U1-U3), current sharing inductor (L1-L6), current sensor (I1-I3), direct current voltage sensor (V1-V3), at the input of three-phase electricity 3 current sensors (I1-I3) of connecting respectively, then after current sharing inductor (L1-L3), be connected to respectively the input of IGBT module (U1-U3), after the inversion of IGBT module (U1-U3) rectification buffering, output is through the alternating current of inversion, the alternating current of this inversion is exported satisfactory three-phase alternating current after current sharing inductor (L4-6) current-sharing, this direct current voltage sensor (V1-V3) connects this IGBT module (U1-U3) so that direct voltage is sampled.
Further, each module at least comprises 12 IGBT pipes (T1-T12) and buffer capacitors, the common port of IGBT pipe (T1) and IGBT pipe (T6), IGBT pipe (T3) and IGBT pipe (T4) common port, IGBT pipe (T5) and IGBT pipe (T2) common port are respectively the input of IGBT module, connect respectively this current sharing inductor (L1-L3), voltage after (T1-T6) rectification of IGBT pipe is by IGBT pipe (T1), IGBT manages (T3), the common port of IGBT pipe (T5) and IGBT pipe (T2), IGBT manages (T4), (T6) common port output of IGBT pipe also cushions at this DC voltage output end this buffer capacitor in parallel, direct voltage after buffering is connected to the inverter circuit being made up of IGBT pipe (T7-T12), and at IGBT pipe (T7) and IGBT pipe (T12) common port, IGBT pipe (T9) and IGBT pipe (T10) common port, IGBT pipe (T11) and the alternating current of IGBT pipe (T8) common port output through inversion.
Further, this DC voltage output end this direct current voltage sensor in parallel (V1-V3) carries out direct voltage sampling.
Further, this control unit comprises FPGA, A/D convertor circuit and pwm signal generation circuit, the sample information of this current sensor (I1-I3) and this direct current voltage sensor (V1-V3) is connected to this A/D convertor circuit and carries out digitlization, sample information after digitlization is transferred into this FPGA and carries out delivering to this host computer through external piloting control device processed after preliminary treatment, this host computer sends command adapted thereto according to sample information and arrives this FGPA through external piloting control device processed, exports this pwm signal generation circuit to and produce pwm signal to this driver element after this FPGA processes.
Further, this commutation inversion module has communication interface, and for being connected in parallel of module and intermodule, several commutation inversion modules can be arbitrarily made with the double-feed current transformer of high-power grade by this communication interface.
Compared with prior art, the commutation inversion module of the double-feed current transformer of a kind of integral structure of the present invention, by the commutation inversion unit of double-feed current transformer is carried out to integrated relating to, has been simplified the Design and manufacture of wind electric converter and has reduced cost; Simplify the maintenance work of the loaded down with trivial details inconvenience of double-feed current transformer simultaneously, saved a large amount of preventive maintenance times; Reduce blower fan maintenance downtime, thereby improved the utilance of wind field energy output.
Brief description of the drawings
Fig. 1 is the structural representation of the commutation inversion module of the double-feed current transformer of a kind of integral structure of the present invention;
Fig. 2 is the structural representation of the IGBT module of commutation inversion unit in preferred embodiment of the present invention;
Fig. 3 is the parallel-connection structure schematic diagram of multiple commutation inversion modules in preferred embodiment of the present invention;
Fig. 4 is the shape assumption diagram of module in preferred embodiment of the present invention.
Embodiment
Below, by specific instantiation accompanying drawings embodiments of the present invention, those skilled in the art can understand other advantage of the present invention and effect easily by content disclosed in the present specification.The present invention also can be implemented or be applied by other different instantiation, and the every details in this specification also can be based on different viewpoints and application, carries out various modifications and change not deviating under spirit of the present invention.
Fig. 1 is the structural representation of the commutation inversion module of the double-feed current transformer of a kind of integral structure of the present invention.What first illustrate at this is, in the present invention for the topological structure of current transformer, can choose any type of topology combination, as the two-way PWM current transformer of voltage-type two level, current mode and voltage-type parallel converters, Thyristor Controlled are handed over alternating flow device, matrix converter, many level current transformers and common clamp resonant converter etc.The present invention builds module topological structure as an example of the two-way PWM structure of voltage-type two level example.As shown in Figure 1, the commutation inversion module of the double-feed current transformer of a kind of integral structure of the present invention, comprises commutation inversion unit 10, control unit 20, driver element 30, accessory power supply 40.
Wherein, commutation inversion unit 10 comprises IGBT module U1-U3, current sharing inductor L1-L6, current sensor I1-I3, direct current voltage sensor V1-V3, it is the relatively complete and module independently of function, be mainly used in input three-phase electricity A, B, it is the three-phase alternating current A ' that meets electrical network requirement that C carries out carrying out inversion after rectification buffering again, B ', C ', and complete the sampling of direct voltage and alternating current and sample information is sent to control unit 20, each IGBT module U1-U3 for commutation inversion of commutation inversion unit 10 has respectively its driver element, drive circuit adopts type of drive altogether, to ensure the consistency of circuit signal, control unit 20 comprises FPGA, A/D convertor circuit (AD sampling) and pwm signal generation circuit, mainly in order to realize the communication data exchange between host computer, comprise and the direct voltage sampling and alternating current are carried out to AD conversion and complete and send to master controller after preliminary treatment again to host computer with read host computer instruction and export to driver element 30 by pwm signal generation circuit generation pwm signal by FPGA.Between control unit 20 and external piloting control device and main controller and host computer, communicate by letter and all adopt high-speed serial communication interface to carry out the transmission of settling signal, to ensure the consistency of signal, ensured the current-sharing effect in module.
Fig. 2 is the structural representation of the IGBT module of commutation inversion unit in preferred embodiment of the present invention.Referring to Fig. 1, Fig. 2, specifically, IGBT module comprises and at least comprises 12 IGBT pipe (T1-T12) and buffer capacitor C, be 3 the current sensor I1-3 that connect respectively on generator outlet line in three-phase electricity input, then the input that is connected to respectively IGBT module U1-3 after current sharing inductor L1-3 is IGBT pipe T1 and IGBT pipe T6 common port, IGBT pipe T3 and IGBT pipe T4 common port, IGBT pipe T5 and IGBT pipe T2 common port, voltage after (T1-T6) rectification of IGBT pipe is managed T1 by IGBT, IGBT manages T3, IGBT pipe T5 common port (DC power supply anode) and IGBT pipe T2, IGBT manages T4, IGBT pipe T6 common port (DC power supply negative terminal) output also cushions in this DC voltage output end parallel connection buffer capacitor C, parallel connection direct voltage sensor V1-V3 carries out direct voltage sampling, direct voltage after buffering is connected to the inverter circuit being made up of IGBT pipe (T7-12), and at IGBT pipe T7 and IGBT pipe T12 common port, IGBT pipe T9 and IGBT pipe T10 common port, IGBT pipe T11 and the output of IGBT pipe T8 common port are through the alternating current of inversion, this inversion alternating current is exported satisfactory three-phase alternating current A ' after current sharing inductor L4-L6 current-sharing, B ', C ', AD conversion (analog-to-digital conversion) circuit that the sample information of current sensor I1-I3 and direct current voltage sensor V1-V3 is connected to control unit 20 carries out digitlization, sample information after digitlization is transferred into FPGA and carries out delivering to host computer through main controller after preliminary treatment, host computer sends command adapted thereto according to sample information and arrives FGPA through main controller, after FPGA processes, export pwm signal generation circuit to and produce pwm signal, this pwm signal exports the control end of each IGBT pipe of the IGBT module U1-U3 of commutation inversion unit 10 to after driver element 30 drives, accessory power supply 40 is for generation of required direct voltages such as control units 20.
It should be noted that at this, in the present invention, each commutation inversion module has communication interface, for being connected in parallel of module and intermodule.Several commutation inversion modules can be arbitrarily made with the double-feed current transformer of high-power grade by interface.Fig. 3 is the parallel-connection structure schematic diagram of multiple commutation inversion modules in preferred embodiment of the present invention, wherein, du/dt and LCL are respectively corresponding to the filter between motor and current transformer and between electrical network and current transformer, and wherein du/dt is single order low pass, and LCL is three rank low passes.
Fig. 4 is the shape assumption diagram of module in preferred embodiment of the present invention.As shown in Figure 4, encapsulate complete module parallel connection and be placed in a clothes closet, because module has certain weight, thus can between each module and clothes closet, be designed with slideway, so that the dismounting of module.
In sum, the commutation inversion module of the double-feed current transformer of a kind of integral structure of the present invention, by the commutation inversion unit of double-feed current transformer is carried out to integrated design, has been simplified the Design and manufacture of wind electric converter, and has reduced cost; Simplify the maintenance work of the loaded down with trivial details inconvenience of double-feed current transformer simultaneously, saved a large amount of preventive maintenance times; Reduce blower fan maintenance downtime, thereby improved the utilance of wind field energy output.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any those skilled in the art all can, under spirit of the present invention and category, modify and change above-described embodiment.Therefore, the scope of the present invention, should be as listed in claims.
Claims (6)
1. the commutation inversion module of the double-feed current transformer of an integral structure, it is characterized in that: this module comprises commutation inversion unit, control unit, driver element, accessory power supply, this commutation inversion unit is to meet the three-phase alternating current that electrical network requires for the three-phase electricity of input being carried out to carry out inversion after rectification buffering again, and complete the sampling of direct voltage and alternating current and sample information is sent to this control unit, this control unit is in order to realize the communication data exchange between host computer, comprise and the direct voltage sampling and alternating current are carried out to AD conversion and complete and send to external piloting control device processed after preliminary treatment again to host computer with read host computer instruction and generate pwm signal and export to driver element by FPGA, by exporting again this commutation inversion unit after this drive unit drives to, this accessory power supply connects this commutation inversion unit, in order to produce the required direct voltage of this control unit.
2. the commutation inversion module of the double-feed current transformer of a kind of integral structure as claimed in claim 1, it is characterized in that: this commutation inversion unit comprises and at least comprises IGBT module (U1-U3), current sharing inductor (L1-L6), current sensor (I1-I3), direct current voltage sensor (V1-V3), at the input of three-phase electricity 3 current sensors (I1-I3) of connecting respectively, then after current sharing inductor (L1-L3), be connected to respectively the input of IGBT module (U1-U3), after the inversion of IGBT module (U1-U3) rectification buffering, output is through the alternating current of inversion, the alternating current of this inversion is exported satisfactory three-phase alternating current after current sharing inductor (L4-6) current-sharing, this direct current voltage sensor (V1-V3) connects this IGBT module (U1-U3) so that direct voltage is sampled.
3. the commutation inversion module of the double-feed current transformer of a kind of integral structure as claimed in claim 2, it is characterized in that: each module at least comprises 12 IGBT pipes (T1-T12) and buffer capacitors, the common port of IGBT pipe (T1) and IGBT pipe (T6), IGBT pipe (T3) and IGBT pipe (T4) common port, IGBT pipe (T5) and IGBT pipe (T2) common port are respectively the input of IGBT module, connect respectively this current sharing inductor (L1-L3), voltage after (T1-T6) rectification of IGBT pipe is by IGBT pipe (T1), IGBT manages (T3), the common port of IGBT pipe (T5) and IGBT pipe (T2), IGBT manages (T4), (T6) common port output of IGBT pipe also cushions at this DC voltage output end this buffer capacitor in parallel, direct voltage after buffering is connected to the inverter circuit being made up of IGBT pipe (T7-T12), and at IGBT pipe (T7) and IGBT pipe (T12) common port, IGBT pipe (T9) and IGBT pipe (T10) common port, IGBT pipe (T11) and the alternating current of IGBT pipe (T8) common port output through inversion.
4. the commutation inversion module of the double-feed current transformer of a kind of integral structure as claimed in claim 3, is characterized in that: this DC voltage output end this direct current voltage sensor in parallel (V1-V3) carries out direct voltage sampling.
5. the commutation inversion module of the double-feed current transformer of a kind of integral structure as claimed in claim 4, it is characterized in that: this control unit comprises FPGA, A/D convertor circuit and pwm signal generation circuit, the sample information of this current sensor (I1-I3) and this direct current voltage sensor (V1-V3) is connected to this A/D convertor circuit and carries out digitlization, sample information after digitlization is transferred into this FPGA and carries out delivering to this host computer through external piloting control device processed after preliminary treatment, this host computer sends command adapted thereto according to sample information and arrives this FGPA through external piloting control device processed, after this FPGA processes, export this pwm signal generation circuit to and produce pwm signal to this driver element.
6. the commutation inversion module of the double-feed current transformer of a kind of integral structure as claimed in claim 5, it is characterized in that: this commutation inversion module has communication interface, for being connected in parallel of module and intermodule, several commutation inversion modules can be arbitrarily made with the double-feed current transformer of high-power grade by this communication interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410200374.8A CN103973130A (en) | 2014-05-13 | 2014-05-13 | Rectification and inversion module of doubly-fed converter of integrated structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410200374.8A CN103973130A (en) | 2014-05-13 | 2014-05-13 | Rectification and inversion module of doubly-fed converter of integrated structure |
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| CN103973130A true CN103973130A (en) | 2014-08-06 |
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| CN201410200374.8A Pending CN103973130A (en) | 2014-05-13 | 2014-05-13 | Rectification and inversion module of doubly-fed converter of integrated structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106253694A (en) * | 2015-06-03 | 2016-12-21 | 新能动力（北京）电气科技有限公司 | A kind of modular electric energy converting means |
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| US5764023A (en) * | 1995-05-03 | 1998-06-09 | Allen Bradley Company, Inc. | Motor controller with circuit interrupter and method for interrupting power to a motor controller |
| CN101729014A (en) * | 2008-10-24 | 2010-06-09 | 上海输配电股份有限公司 | Converter in double-fed wind generating set |
| CN102340255A (en) * | 2010-07-16 | 2012-02-01 | 洛克威尔自动控制技术股份有限公司 | Power layer generation of inverter gate drive signals |
| CN102593864A (en) * | 2012-02-17 | 2012-07-18 | 浙江省电力试验研究院 | Photovoltaic energy storage integrated converter |
| CN103515978A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Efficient rectification-inversion-integrated energy feedback system |
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2014
- 2014-05-13 CN CN201410200374.8A patent/CN103973130A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5764023A (en) * | 1995-05-03 | 1998-06-09 | Allen Bradley Company, Inc. | Motor controller with circuit interrupter and method for interrupting power to a motor controller |
| CN101729014A (en) * | 2008-10-24 | 2010-06-09 | 上海输配电股份有限公司 | Converter in double-fed wind generating set |
| CN102340255A (en) * | 2010-07-16 | 2012-02-01 | 洛克威尔自动控制技术股份有限公司 | Power layer generation of inverter gate drive signals |
| CN102593864A (en) * | 2012-02-17 | 2012-07-18 | 浙江省电力试验研究院 | Photovoltaic energy storage integrated converter |
| CN103515978A (en) * | 2013-03-21 | 2014-01-15 | 王林兵 | Efficient rectification-inversion-integrated energy feedback system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106253694A (en) * | 2015-06-03 | 2016-12-21 | 新能动力（北京）电气科技有限公司 | A kind of modular electric energy converting means |
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Application publication date: 20140806 |