CN103762854A - Voltage regulation device based on power electronic transformer - Google Patents
Voltage regulation device based on power electronic transformer Download PDFInfo
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- CN103762854A CN103762854A CN201410055339.1A CN201410055339A CN103762854A CN 103762854 A CN103762854 A CN 103762854A CN 201410055339 A CN201410055339 A CN 201410055339A CN 103762854 A CN103762854 A CN 103762854A
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Abstract
The invention relates to a voltage regulation device based on a power electronic transformer. The voltage regulation device comprises a three-phase voltage regulation structure and a filter. Each single-phase voltage regulation structure is composed of a three-level voltage regulation structure. Each three-level voltage regulation structure comprises an input level, an isolation level and an output level. Each input level comprises a first power converter, wherein the input end of the first power converter is connected in a Y-shaped mode, the first power converter is connected to a single-phase circuit in a parallel mode, and the output end of the first power converter is connected with the corresponding isolation level. Each isolation level comprises a high-frequency transformer, wherein the primary side of the high-frequency transformer is connected with the output end of the corresponding first power converter, and the output end of the high-frequency transformer is connected with a three-phase power supply network. Each output level comprises a second power converter, wherein the auxiliary side of the corresponding high-frequency transformer is connected with the input end of the second power converter, and the output end of the second power converter is connected with the input end of the filter. The output end of the filter is connected with the three-phase power supply network. The voltage regulation device based on the power electronic transformer has the advantages of having the automatic voltage regulation function and being high in voltage regulation efficiency.
Description
Technical field
The invention belongs to the application of power electronics in electric power system, be specifically related to a kind of regulator based on electric power electric transformer.
Background technology
In power distribution network, supply line is the various voltage disturbances of mixed appearance often, as voltage falls, rise, and flickering, overvoltage and under voltage etc.For the load to voltage-sensitive, as computer and communication apparatus etc., often can cause huge loss, as the loss of precious data, the middle-end of communication etc.Traditional servo-type Voltagre regulator can solve the problem of supply line's voltage disturbance, but traditional servo-type Voltagre regulator goes system to inject a bucking voltage with a variable autotransformer and isolating transformer, this structure not only dynamic response contrast is slow, and large Industrial Frequency Transformer is also its major defect, Industrial Frequency Transformer not only volume is large, cost is high, and conversion efficiency is low.
The concept of the electric power electric transformer seventies in last century (PET-Power electronic transformer) is suggested, and PET utilizes power electronics commutation technique to realize voltage transformation and energy transmits.Its outstanding feature be by voltage source converter (VSC) to its former secondary AC voltage, the amplitude of electric current and phase place are carried out continuous controllable adjustment.Automatic voltage regulator based on electric power electric transformer, sampling high frequency transformer is realized the function of traditional autotransformer and isolating transformer, has greatly reduced the volume of device, has improved whole conversion efficiency.
Summary of the invention
In view of the above-mentioned problems in the prior art, the object of the invention is to address the deficiencies of the prior art, the regulator based on electric power electric transformer that a kind of automatic Regulation and pressure regulation efficiency are high is provided.
The invention provides a kind of regulator based on electric power electric transformer, comprise three phase voltage regulating structure, each single-phase voltage regulating structure consists of three grades of pressure adjusting structures, and described three grades of pressure adjusting structures comprise input stage, isolation level and output stage, also comprise filter, wherein:
Described input stage comprises the first power inverter, the input Y-connection of the first power inverter described in described input stage, described the first power inverter is connected in parallel on uniline, the output of described the first power inverter is connected with described isolation level, described the first power inverter adopts bridge type topology structure, and described the first power inverter adopts bridge type topology structure to comprise the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
described the first power switch unit S1 and described the second power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 3rd power switch unit S2 and described the 4th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
Described isolation level comprises high frequency transformer, and the former limit of described high frequency transformer is connected with the output of described the first power inverter, and the output of described high frequency transformer connects three phase supply network;
Described output stage comprises the second power inverter, the secondary of described high frequency transformer is connected with the input of described the second power inverter, the output of described the second power inverter is connected with the input of described filter, the output of described filter is connected with three phase supply network, and described the second power inverter adopts bridge type topology structure to comprise the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
described the 5th power switch unit S3 and described the 6th power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 7th power switch unit S4 and described the 8th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
The input of described filter is connected with the output of described the second power inverter, the output of described filter is connected with three phase supply network, described filter is comprised of output filter capacitor C1, the first output inductor L1, the second output inductor L2, described output filter capacitor C1 is attempted by the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2, and the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2 connects on uniline.
Further, described the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
Further, described the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
Further, the output of described the first power inverter is connected with the former end of described high frequency transformer.
The advantage that the present invention has and beneficial effect are: the described regulator based on electric power electric transformer is except having the advantage of traditional pressurizer, owing to adopting high frequency transformer to carry out transformation, so greatly reduced the volume of single unit system, improved the efficiency of whole device; By adopting corresponding control mode, can be easily modification stability output voltage automatically, there is good dynamic property, can to each phase voltage of circuit, compensate adjusting timely, can well suppress voltage fluctuation, flickering, fall, the quality of voltage problem such as rising, overvoltage and under voltage.
Accompanying drawing explanation
Fig. 1 is the theory diagram based on electric power electric transformer based on AC-AC type of the present embodiment;
Fig. 2 is the phase structure topological diagram of the regulator based on electric power electric transformer of the present embodiment;
Fig. 3 is the three-phase structure topological diagram based on electric power electric transformer based on AC-AC type of the present embodiment.
Embodiment
The present invention is further illustrated with specific embodiment below with reference to accompanying drawings.
As depicted in figs. 1 and 2: a kind of regulator based on electric power electric transformer of the embodiment of the present invention, comprise three phase voltage regulating structure, each single-phase voltage regulating structure consists of three grades of pressure adjusting structures, and described three grades of pressure adjusting structures comprise input stage, isolation level and output stage, also comprise filter, wherein:
Described input stage comprises the first power inverter, the input Y-connection of the first power inverter described in described input stage, described the first power inverter is connected in parallel on uniline, the output of described the first power inverter is connected with described isolation level, described the first power inverter adopts bridge type topology structure, and described the first power inverter adopts bridge type topology structure to comprise the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
described the first power switch unit S1 and described the second power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 3rd power switch unit S2 and described the 4th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
Described isolation level comprises high frequency transformer, and the former limit of described high frequency transformer is connected with the output of described the first power inverter, and the output of described high frequency transformer connects three phase supply network;
Described output stage comprises the second power inverter, the secondary of described high frequency transformer is connected with the input of described the second power inverter, the output of described the second power inverter is connected with the input of described filter, the output of described filter is connected with three phase supply network, and described the second power inverter adopts bridge type topology structure to comprise the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
described the 5th power switch unit S3 and described the 6th power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 7th power switch unit S4 and described the 8th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
The input of described filter is connected with the output of described the second power inverter, the output of described filter is connected with three phase supply network, described filter is comprised of output filter capacitor C1, the first output inductor L1, the second output inductor L2, described output filter capacitor C1 is attempted by the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2, and the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2 connects on uniline.
As the preferred implementation of above-described embodiment, described the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
As the preferred implementation of above-described embodiment, described the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
As the preferred implementation of above-described embodiment, the output of described the first power inverter is connected with the former end of described high frequency transformer.
The regulator control method based on electric power electric transformer of the present embodiment, when each phase line voltage distribution falls, during under voltage, the positive voltage of device output compensates line voltage distribution; When line voltage distribution rises, during overvoltage, the negative voltage of device output compensates line voltage distribution.
As shown in Figure 3: should the regulator based on electric power electric transformer be the regulator based on AC-AC type electric power electric transformer, wherein, Ua, Ub and Uc are respectively each phase voltage of three phase supply network, its input stage is also connected in three phase supply network, output stage is respectively in series and is connected on three phase supply network, realizes each phase voltage is regulated.The three-phase structure of this device is identical and independent, the operation principle of each phase is identical, be: former side is converted into high-frequency signal (its frequency is that 600HZ is to 1.2kHZ) by power-frequency voltage signal by the first power inverter 1, it is raising frequency, then by middle high frequency transformer 3, be coupled to pair side, recycle the second power inverter 2 and be synchronously reduced into power-frequency voltage signal, i.e. frequency reducing.By phase shifting control, can change the amplitude of fundamental voltage output of voltage, need extra output filter 4 simultaneously.
The structure of being somebody's turn to do each phase of regulator based on electric power electric transformer is all identical, comprises following composition: adopt three grades of formations, i.e. input stage, isolation level and output stage; Input stage comprises the first power inverter 1, and described the first power inverter 1 adopts bridge type topology structure, comprises the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
each switch element composes in parallel by two insulated gate bipolar transistors and an anti-paralleled diode, can realize electric power two-way flow; Isolation level comprises high frequency transformer 3, can reduce device volume, improve whole efficiency, realize the function that change in voltage and energy transmit, output stage comprises the second power inverter 2, the same with input stage, described the second power inverter 2 also adopts the topological structure of bridge-type, comprises the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
each power switch unit composes in parallel by two insulated gate bipolar transistors and an anti-paralleled diode, can realize electric current two-way flow, and output-stage power converter also connects filter 4, to improve voltage current waveform quality.The AC power frequency voltage of input is modulated to high-frequency ac voltage through former limit the first power inverter 1, and modulation is by the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
operate in that soft switch device realizes, wherein the first power switch unit S1 and the second power switch unit
complementary conducting, described the 3rd power switch unit S2 and described the 4th power switch unit
complementary conducting; Secondly, the former limit of high frequency transformer 3 high frequency modulated voltage is coupled to its secondary, and then, by its secondary and identical power inverter 2 counter modulation of former limit structure, modulation is by five power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
operate in that soft on off state realizes, the high frequency voltage of output, through output filter, filtering is converted into desired voltage.
The three-phase structure that is somebody's turn to do the regulator based on electric power electric transformer is to be combined by each phase structure, and its input stage is connected in parallel on three-phase power line, and output stage is respectively in series on three-phase power line; The phase structure of this device of take is example, and the input terminal voltage that its pressure regulation process: Vin is device is described, Va is the output end voltage of device, this voltage overlapped in series in supply line, thereby circuit output voltage V o is regulated, wherein, Vo=Vin|+Va.When circuit voltage falls, during under voltage, the positive voltage Va of device output compensates line voltage distribution Vo; When line voltage distribution rises, during overvoltage, the negative voltage Va of device output compensates line voltage distribution Vo; Device adopts corresponding control strategy, has good dynamic property, can to line voltage distribution, compensate adjusting timely, can well suppress voltage fluctuation, flickering, fall, the quality of voltage problem such as rising, overvoltage and under voltage.
Finally it should be noted that: above-described each embodiment, only for technical scheme of the present invention is described, is not intended to limit; Although the present invention is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record previous embodiment is modified, or to wherein partly or entirely technical characterictic be equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (4)
1. the regulator based on electric power electric transformer, it is characterized in that: comprise three phase voltage regulating structure, each single-phase voltage regulating structure consists of three grades of pressure adjusting structures, described three grades of pressure adjusting structures comprise input stage, isolation level and output stage, also comprise filter, wherein:
Described input stage comprises the first power inverter, the input Y-connection of the first power inverter described in described input stage, described the first power inverter is connected in parallel on uniline, the output of described the first power inverter is connected with described isolation level, described the first power inverter adopts bridge type topology structure, and described the first power inverter adopts bridge type topology structure to comprise the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
described the first power switch unit S1 and described the second power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 3rd power switch unit S2 and described the 4th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
Described isolation level comprises high frequency transformer, and the former limit of described high frequency transformer is connected with the output of described the first power inverter, and the output of described high frequency transformer connects three phase supply network;
Described output stage comprises the second power inverter, the secondary of described high frequency transformer is connected with the input of described the second power inverter, the output of described the second power inverter is connected with the input of described filter, the output of described filter is connected with three phase supply network, and described the second power inverter adopts bridge type topology structure to comprise the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
described the 5th power switch unit S3 and described the 6th power switch unit
after complementary conducting, be connected with the former limit anode of described high frequency transformer, described the 7th power switch unit S4 and described the 8th power switch unit
after complementary conducting, be connected with the former limit negative terminal of described high frequency transformer;
The input of described filter is connected with the output of described the second power inverter, the output of described filter is connected with three phase supply network, described filter is comprised of output filter capacitor C1, the first output inductor L1, the second output inductor L2, described output filter capacitor C1 is attempted by the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2, and the Same Name of Ends of described the first output inductor L1 and described the second output inductor L2 connects on uniline.
2. the regulator based on electric power electric transformer according to claim 1, is characterized in that, described the first power switch unit S1, the second power switch unit
the 3rd power switch unit S2 and the 4th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
3. the regulator based on electric power electric transformer according to claim 1, is characterized in that, described the 5th power switch unit S3, the 6th power switch unit
the 7th power switch unit S4 and the 8th power switch unit
by two insulated gate bipolar transistors and an anti-paralleled diode, compose in parallel.
4. the regulator based on electric power electric transformer according to claim 1, is characterized in that, the output of described the first power inverter is connected with the former end of described high frequency transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055339.1A CN103762854A (en) | 2014-02-19 | 2014-02-19 | Voltage regulation device based on power electronic transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410055339.1A CN103762854A (en) | 2014-02-19 | 2014-02-19 | Voltage regulation device based on power electronic transformer |
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| CN201410055339.1A Pending CN103762854A (en) | 2014-02-19 | 2014-02-19 | Voltage regulation device based on power electronic transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111628665A (en) * | 2020-05-30 | 2020-09-04 | 青岛鼎信通讯股份有限公司 | Medium-high voltage power electronic transformer based on serial digital voltage stabilizer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201499090U (en) * | 2009-07-23 | 2010-06-02 | 东南大学 | Automatic voltage regulation device for power electronic transformer |
| JP2010200414A (en) * | 2009-02-23 | 2010-09-09 | Shigeki Watanabe | Power-saving wiring circuit |
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2014
- 2014-02-19 CN CN201410055339.1A patent/CN103762854A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010200414A (en) * | 2009-02-23 | 2010-09-09 | Shigeki Watanabe | Power-saving wiring circuit |
| CN201499090U (en) * | 2009-07-23 | 2010-06-02 | 东南大学 | Automatic voltage regulation device for power electronic transformer |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111628665A (en) * | 2020-05-30 | 2020-09-04 | 青岛鼎信通讯股份有限公司 | Medium-high voltage power electronic transformer based on serial digital voltage stabilizer |
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Application publication date: 20140430 |