CN201966811U - Buck power electronics transformer used for network distribution - Google Patents
Buck power electronics transformer used for network distribution Download PDFInfo
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- CN201966811U CN201966811U CN2010206774605U CN201020677460U CN201966811U CN 201966811 U CN201966811 U CN 201966811U CN 2010206774605 U CN2010206774605 U CN 2010206774605U CN 201020677460 U CN201020677460 U CN 201020677460U CN 201966811 U CN201966811 U CN 201966811U
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- insulated gate
- gate bipolar
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- bipolar transistor
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model discloses a buck power electronics transformer used for network distribution. Each single-phase structure in three phase circuits of the buck power electronics transformer used for the network distribution is same and independent; each phase comprises an input stage, an isolation stage, and an output stage; the input stage of single-phase is cascaded by a plurality of same power convertors so as to adapt to high voltage input; each power convertor comprises an uncontrolled rectifier bridge and a power factor correcting circuit based on boost; the isolation stage comprises a high-frequency DC/AC (direct current/alternating current) module, a high-frequency transformer, and a high-frequency AC/DC (alternating current/direct current) module; output stages of output stage modules of each phase adopt a parallel mode so as to adapt to high-power load; the output stage consists of a three-phase voltage source convertor with four bridge arms, and can realize three-path output according to the demands of loads; and a convertor of the output stage is also connected with an LC (low capacitance) wave filter so as to improve the quality of voltage current waveforms. The buck power electronics transformer used for the network distribution can improve the conversion efficiency simultaneously when reducing the production cost, can improve the reliability, can adapt to different load requirements for the network distribution, can improve the using flexibility when being used for the network distribution, and has good application prospect.
Description
Technical field
The utility model relates to a kind of power transmission and distribution device that can realize multiple function, is specifically related to a kind of voltage-dropping type electric power electric transformer that is used for distribution.
Background technology
Power transformer has become the basic composition equipment of electrical power trans mission/distribution system since 19th century were invented.Manufacture craft is simple though traditional power transformer has, the reliability advantages of higher, but it only can realize electric pressure conversion and insulation isolation, function ratio is more single, and because there is electromagnetic coupled in the former secondary of transformer, can't realize the isolation of transformer both sides fault current, voltage, the fault restriction scope; Can't realize the isolation of transformer both sides distortion current, interference voltage, cause sensitive load to be affected on the one hand, cause electric network pollution on the other hand; Work as transformer in addition and also have magnetizing inrush current, paired running sharing of load inequality and problems such as circulation, insulating oil contaminated environment.
The notion of the electric power electric transformer seventies in last century (PET-Power electronic transformer) is suggested, and PET utilizes the power electronics commutation technique to realize voltage transformation and energy delivery.Its outstanding feature is by voltage source converter (VSC) amplitude and the phase place of its former secondary AC side voltage, electric current to be carried out the continuous controllable adjusting.Therefore, PET not only can overcome the defective of traditional transformer, can also solve the problems such as electromagnetic looped network, the quality of power supply, reactive-load dynamic compensation and the raising system stability limit that electric power system faces.Along with power electronic device level and high frequency transformer Development of Materials, electric power electric transformer will be brought into play indispensable effect in intelligent grid.
The utility model content
Goal of the invention: in order to overcome the deficiencies in the prior art, the utility model provides a kind of voltage-dropping type electric power electric transformer that is used for distribution, not only can realize voltage transformation, the voltage isolation of traditional transformer, the simple functions of energy delivery, can also realize reactive power compensation, harmonic wave control and intelligent grid under some new demands.
Technical scheme: for achieving the above object, a kind of voltage-dropping type electric power electric transformer that is used for distribution of the present utility model, each phase structure is identical and independent in its three-phase circuit, every input stage, isolation level and output stage of comprising mutually, described input stage is formed by some identical power inverter cascades, can adapt to the high voltage input like this, the power inverter DC side connects corresponding dc energy storage electric capacity; Described isolation level comprises high frequency DC/AC module, high frequency transformer and high-frequency AC/DC module; Described output stage is made of the three-phase inverter of four brachium pontis, the corresponding series filter of each inverter power converter AC side; The input of three-phase adopts the Y type to connect, and the output of the isolation level of every phase adopts mode in parallel to connect, and can adapt to high power load like this.
Described output stage adopts the three-phase four-arm structure to be applicable to three-phase four-wire system, and the output of No. three inverters that the three-phase input is corresponding can adopt separately three tunnel outputs or mode in parallel to export to adapt to the power distribution network load request.
The cascade number of the power inverter of described input stage and the voltage of input side are suitable, described power inverter comprises not control rectifying circuit and by inductance of the H bridge be made up of four diodes, the circuit of power factor correction that insulated gate bipolar transistor (IGBT) and the 5th diode are formed based on boost, described H bridge is thyristor in parallel between two end lines of control rectifying circuit output DC side not, the anode series inductance of DC side, insulated gate bipolar transistor in parallel between two end lines of DC side again, subsequently at the anode of DC side the 5th diode of connecting, and parallel connection direct storage capacitor between two end lines of DC side again.
The full bridge inverter that described high frequency DC/AC module adopts four insulated gate bipolar transistors to form, the full-bridge that high-frequency AC/four diodes of DC module employing are formed is control rectifying circuit not.Specifically, described four insulated gate bipolar transistors are first insulated gate bipolar transistor, second insulated gate bipolar transistor, the 3rd insulated gate bipolar transistor and the 4th insulated gate bipolar transistor, series resonance electric capacity connects the former limit of high frequency transformer anode after first insulated gate bipolar transistor, the second insulated gate bipolar transistor conducting, connects the former limit of high frequency transformer negative terminal after the 3rd insulated gate bipolar transistor, the 4th insulated gate bipolar transistor conducting; Four diodes comprise first diode, second diode, the 3rd diode and the 4th diode, connection mid point after first diode, the series connection of second diode connects the secondary anode of high frequency transformer, connection mid point after the 3rd diode, the series connection of the 4th diode connects the secondary negative terminal of high frequency transformer, the DC side output is connected in parallel on the second dc energy storage electric capacity, and this second dc energy storage electric capacity is in order to improve the power of output.
Described filter is made up of output inductor and output filter capacitor, can improve the voltage current waveform quality.
Beneficial effect: a kind of voltage-dropping type electric power electric transformer that is used for distribution of the present utility model compared with prior art, except the advantage that possesses the conventional electric power electronic transformer, also has the following advantages:
1, the utility model is provided with the bypass thyristor at each input module, can excise the normal operation that this module does not influence whole system when certain input power unit module breaks down, and improves the reliability of device greatly;
2, the utility model increases resonant capacitance isolating the AC/DC module, and the realization by the isolation module resonant type soft-switch reduces the wastage, and improves the conversion efficiency of electric power electric transformer;
3, multichannel of the present utility model output can adapt to the different loads requirement of distribution, can adopt the mode of multichannel output-parallel for high power load, improves the flexibility that it uses in distribution;
4, the utility model is connected in the distribution system, on the one hand by regulating the amplitude and the phase place of its AC side voltage, electric current, solves power quality problems such as voltage dip/temporary liter, harmonic wave, fluctuation and flickering; On the other hand, by its AC-DC-AC module, and high frequency transformer isolates, can realize loading and electric power system between interference isolate, suppress harmonic wave, improve the electrical network electric circumstance;
5, the amplitude of former secondary AC side voltage of the present utility model, electric current and phase place can be carried out the continuous controllable adjusting, therefore can adjust the equivalent electrical impedance of place circuit, improve the transient stability limit of the electromagnetic looped network section at power grid construction initial stage;
6, the utility model adopts modularized design, can offer convenience for its assembling, enhances productivity greatly.
Description of drawings
Fig. 1 is a kind of single-phase theory diagram that is used for the voltage-dropping type electric power electric transformer of distribution of the present utility model;
Fig. 2 is a kind of whole theory diagram of three-phase that is used for the voltage-dropping type electric power electric transformer of distribution of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is done further explanation.
As depicted in figs. 1 and 2, a kind of voltage-dropping type electric power electric transformer that is used for distribution, each phase structure is identical and independent in its three-phase circuit, every input stage, isolation level and output stage of comprising mutually, input stage is formed by some identical power inverter cascades, can adapt to the high voltage input, the power inverter DC side connects corresponding dc energy storage electric capacity 1; Isolation level comprises high frequency DC/AC module, high frequency transformer and high-frequency AC/DC module; Output stage is made of the three-phase inverter of four brachium pontis, the corresponding series filter 2 of each inverter power converter AC side, and the LC filter that filter 2 is made up of output inductor and output filter capacitor, it can improve the voltage current waveform quality; The input of three-phase adopts the Y type to connect, and the output of the isolation level of every phase adopts mode in parallel to connect, and it can adapt to high power load.
Specifically, the cascade number of the power inverter of input stage and the voltage of input side are suitable, power inverter comprises not control rectifying circuit and by inductance 4 of the H bridge be made up of four diodes 3, the circuit of power factor correction that insulated gate bipolar transistor 5 and the 5th diode 6 are formed based on boost, the H bridge is thyristor 7 in parallel between two end lines of control rectifying circuit output DC side not, the anode series inductance 4 of DC side, insulated gate bipolar transistor 5 in parallel between two end lines of DC side again, subsequently at the anode of DC side the 5th diode 6 of connecting, and parallel connection direct storage capacitor 1 between two end lines of DC side again.
The full bridge inverter that high frequency DC/AC module adopts four insulated gate bipolar transistors to form, the full-bridge that high-frequency AC/four diodes of DC module employing are formed is control rectifying circuit not.Specifically, four insulated gate bipolar transistors are first insulated gate bipolar transistor 11, second insulated gate bipolar transistor 12, the 3rd insulated gate bipolar transistor 13 and the 4th insulated gate bipolar transistor 14, series resonance electric capacity 8 connects the former limit of high frequency transformer anode after first insulated gate bipolar transistor 11,12 conductings of second insulated gate bipolar transistor, connects the former limit of high frequency transformer negative terminal after the 3rd insulated gate bipolar transistor 13,14 conductings of the 4th insulated gate bipolar transistor; Four diodes comprise first diode 21, second diode 22, the 3rd diode 23 and the 4th diode 24, connection mid point after first diode 21,22 series connection of second diode connects the secondary anode of high frequency transformer, connection mid point after the 3rd diode 23,24 series connection of the 4th diode connects the secondary negative terminal of high frequency transformer, the DC side output is connected in parallel on the second dc energy storage electric capacity 9, and this second dc energy storage electric capacity 9 is in order to improve the power of output.
A kind of voltage-dropping type electric power electric transformer that is used for distribution of the present utility model, its output stage adopts the three-phase four-arm structure to be applicable to three-phase four-wire system, and the output of No. three inverters that the three-phase input is corresponding can adopt separately three tunnel outputs or mode in parallel to export to adapt to the power distribution network load request.
The above only is a preferred implementation of the present utility model; be noted that for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (4)
1. voltage-dropping type electric power electric transformer that is used for distribution, it is characterized in that: each phase structure is identical and independent in its three-phase circuit, every input stage, isolation level and output stage of comprising mutually, described input stage is formed by some identical power inverter cascades, and the power inverter DC side connects corresponding dc energy storage electric capacity (1); Described isolation level comprises high frequency DC/AC module, high frequency transformer and high-frequency AC/DC module; Described output stage is made of the three-phase inverter of four brachium pontis, the corresponding series filter (2) of each inverter power converter AC side; The input of three-phase adopts the Y type to connect, and the output of the isolation level of every phase adopts mode in parallel to connect.
2. a kind of voltage-dropping type electric power electric transformer that is used for distribution according to claim 1, it is characterized in that: the cascade number of the power inverter of described input stage and the voltage of input side are suitable, described power inverter comprises not control rectifying circuit and by inductance (4) of the H bridge be made up of four diodes (3), the circuit of power factor correction that insulated gate bipolar transistor (5) and the 5th diode (6) are formed based on boost, described H bridge is thyristor in parallel (7) between two end lines of control rectifying circuit output DC side not, the anode series inductance (4) of DC side, insulated gate bipolar transistor in parallel (5) between two end lines of DC side again, subsequently at the anode of DC side the 5th diode (6) of connecting, and parallel connection direct storage capacitor (1) between two end lines of DC side again.
3. a kind of voltage-dropping type electric power electric transformer that is used for distribution according to claim 1 and 2, it is characterized in that: the full bridge inverter that described high frequency DC/AC module adopts four insulated gate bipolar transistors to form, the full-bridge that high-frequency AC/four diodes of DC module employing are formed is control rectifying circuit not.
4. a kind of voltage-dropping type electric power electric transformer that is used for distribution according to claim 3, it is characterized in that: described four insulated gate bipolar transistors are first insulated gate bipolar transistor (11), second insulated gate bipolar transistor (12), the 3rd insulated gate bipolar transistor (13) and the 4th insulated gate bipolar transistor (14), first insulated gate bipolar transistor (11), series resonance electric capacity (8) connects the former limit of high frequency transformer anode, the 3rd insulated gate bipolar transistor (13) after second insulated gate bipolar transistor (12) conducting, connect the former limit of high frequency transformer negative terminal after the 4th insulated gate bipolar transistor (14) conducting; Four diodes comprise first diode (21), second diode (22), the 3rd diode (23) and the 4th diode (24), connection mid point after first diode (21), second diode (22) series connection connects the secondary anode of high frequency transformer, connection mid point after the 3rd diode (23), the 4th diode (24) series connection connects the secondary negative terminal of high frequency transformer, and the DC side output is connected in parallel on the second dc energy storage electric capacity (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206774605U CN201966811U (en) | 2010-12-24 | 2010-12-24 | Buck power electronics transformer used for network distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206774605U CN201966811U (en) | 2010-12-24 | 2010-12-24 | Buck power electronics transformer used for network distribution |
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| Publication Number | Publication Date |
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| CN201966811U true CN201966811U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010206774605U Expired - Fee Related CN201966811U (en) | 2010-12-24 | 2010-12-24 | Buck power electronics transformer used for network distribution |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201923A (en) * | 2014-09-12 | 2014-12-10 | 南京航空航天大学 | Three-phase four-bridge arm isolation-type inverter and control method thereof |
| CN105186876A (en) * | 2015-07-13 | 2015-12-23 | 国家电网公司 | Vehicle-borne power supply of power overhaul vehicle |
| CN106507654A (en) * | 2016-10-14 | 2017-03-15 | 国网上海市电力公司 | A kind of anti-interference isolation and communication device for extra-high voltage equipment vibration-testing |
| CN106655729A (en) * | 2016-10-31 | 2017-05-10 | 广西电网有限责任公司电力科学研究院 | Low voltage output module of modular power distribution network electric power electron transformer |
| CN117639522A (en) * | 2023-11-28 | 2024-03-01 | 辽宁振昌智能电气设备有限公司 | 5G base station power supply converter applied to alpine region |
-
2010
- 2010-12-24 CN CN2010206774605U patent/CN201966811U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104201923A (en) * | 2014-09-12 | 2014-12-10 | 南京航空航天大学 | Three-phase four-bridge arm isolation-type inverter and control method thereof |
| CN105186876A (en) * | 2015-07-13 | 2015-12-23 | 国家电网公司 | Vehicle-borne power supply of power overhaul vehicle |
| CN106507654A (en) * | 2016-10-14 | 2017-03-15 | 国网上海市电力公司 | A kind of anti-interference isolation and communication device for extra-high voltage equipment vibration-testing |
| CN106655729A (en) * | 2016-10-31 | 2017-05-10 | 广西电网有限责任公司电力科学研究院 | Low voltage output module of modular power distribution network electric power electron transformer |
| CN117639522A (en) * | 2023-11-28 | 2024-03-01 | 辽宁振昌智能电气设备有限公司 | 5G base station power supply converter applied to alpine region |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110907 Termination date: 20111224 |