CN2798390Y - Main circuit for insulating type static reactive generator of transformer - Google Patents
Main circuit for insulating type static reactive generator of transformer Download PDFInfo
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- CN2798390Y CN2798390Y CN 200520050489 CN200520050489U CN2798390Y CN 2798390 Y CN2798390 Y CN 2798390Y CN 200520050489 CN200520050489 CN 200520050489 CN 200520050489 U CN200520050489 U CN 200520050489U CN 2798390 Y CN2798390 Y CN 2798390Y
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- 230000003068 static effect Effects 0.000 title abstract 2
- 238000004804 winding Methods 0.000 claims abstract description 45
- 238000002955 isolation Methods 0.000 claims abstract description 32
- 239000003990 capacitor Substances 0.000 claims abstract description 11
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 2
- 230000001012 protector Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Abstract
The utility model discloses a main circuit for an insulating type static reactive generator of a transformer, which comprises N A-phase full-bridge voltage source inversion bridges, N B-phase full-bridge voltage source inversion bridges, N C-phase full-bridge voltage source inversion bridges and a three-phase multi-winding isolation transformer, wherein the input terminal of each single-phase full-bridge voltage source inversion bridge is connected with a DC capacitor in parallel, the output terminal of each single-phase full-bridge voltage source inversion bridge is connected with a winding at the inversion side of the three-phase multi-winding isolation transformer through a reactor, each phase of the three-phase multi-winding isolation transformer is composed of a winding at the output side and N windings at the inversion side, and windings at the three-phase output side are connected into a star shape or a delta connection and then are used as the three-phase AC output to be connected with a system voltage source. Due to the adoption of the reactive generator of the main circuit, the utility model has the advantage of less occupation of the floor area and low cost. The utility model can be suitable for any system voltage, and the output reactive power can be controlled by split phase.
Description
Technical field
The utility model relates to a kind of main circuit of transformer isolation type stillness wattless occurrence apparatus, belongs to the electric automatization apparatus field.
Background technology
Reactive generating device is the effective ways that improve specific power load power factor, compensating load current imbalance, the flickering of inhibition supply power voltage, improve line voltage stability.Traditional reactive power compensator is to adopt the method for mechanical switch switched capacitor or reactor or employing thyristor switchable capacitor or control reactor to come compensating power.These traditional compensation methodes have the shortcoming that dynamic responding speed is slow, continuous controllable is poor, startup is impacted greatly, current harmonic content is big.
Novel stillness wattless occurrence apparatus adopts voltage source inverter to realize, the similar compensator of principle, having rapid dynamic response speed, the impact of starting nothing, regulate advantages such as continuous, that floor space is little, current harmonic content is little, is the developing direction of dynamic reactive compensation device.Common novel reactive generating device main circuit generally adopts multipleization of transformer voltage source inverter or chain inverter to realize that multipleization of transformer voltage source inverter has the big shortcoming of floor space at present, and chain inverter has the high shortcoming of cost.
The utility model content
The purpose of this utility model is to overcome the deficiency of prior art and main circuit that a kind of transformer isolation type stillness wattless occurrence apparatus is provided, make the floor space of stillness wattless occurrence apparatus littler, cost is lower, and can adapt to any system voltage, the output reactive power can be controlled in phase-splitting.
For achieving the above object, the technical scheme that the utility model is taked is: comprise N A phase full-bridge voltage source inverter bridge, N B phase full-bridge voltage source inverter bridge, N C phase full-bridge voltage source inverter bridge, the three-phase multi-winding isolation transformer, described N A phase full-bridge voltage source inverter bridge, N B phase full-bridge voltage source inverter bridge, N C phase full-bridge voltage source inverter bridge is single-phase full bridge voltage source inverter bridge, the corresponding input parallel connection of each single-phase full bridge voltage source inverter bridge, the input of each single-phase full bridge voltage source inverter bridge is parallel with direct current capacitor, and the output of each single-phase full bridge voltage source inverter bridge is received the inversion side winding of three-phase multi-winding isolation transformer through reactor; The three-phase multi-winding isolation transformer is every to be made up of an output side winding and N inversion side winding, and the three-phase output side winding is received system voltage source as the three-phase alternating current output of inverter after connecting into star or delta connection, and N is a positive integer.
In the main circuit of above-mentioned transformer isolation type stillness wattless occurrence apparatus, described single-phase full bridge voltage source inverter bridge adopts the single-phase two level voltage source inverter bridge or the single-phase three-level voltage source inverter bridge of standard.
In the main circuit of above-mentioned transformer isolation type stillness wattless occurrence apparatus, described three-phase multi-winding isolation transformer adopts three core limbs or five core limb structures.
In the main circuit of above-mentioned transformer isolation type stillness wattless occurrence apparatus, described reactor can be substituted by the leakage reactance of each inversion side winding of three-phase multi-winding isolation transformer.
Advantage of the present utility model: the main circuit of this transformer isolation type stillness wattless occurrence apparatus has the ability that adapts to the free voltage grade, only needs to change transformer voltage ratio and gets final product; In addition, it has avoided the common transformer multiple inverter to need the shortcoming of many transformers, has reduced floor space, and the reactive power of output can phase-splitting control, can realize the compensation of laod unbalance.
Description of drawings
Fig. 1 is the circuit theory diagrams during single-phase two level voltage source inverter bridge for the utility model adopts.
Fig. 2 is the circuit theory diagrams during single-phase three-level voltage source inverter bridge for the utility model adopts.
Fig. 3 is two level voltage source inverter bridge circuit theory diagrams of the utility model accepted standard.
Fig. 4 is the three-level voltage source inverter bridge circuit theory diagrams of the utility model accepted standard.
Embodiment
Below in conjunction with accompanying drawing circuit embodiments structure of the present utility model and operation principle are further described.
Device when the utility model adopts single-phase two level voltage source inverter bridge constitutes embodiment as shown in Figure 1, CA1-CAN among Fig. 1, CB1-CBN, CC1-CCN are respectively the direct current capacitor that forms direct voltage source, can be connected in parallel as shown in fig. 1 between direct current capacitor group positive pole and the negative pole, also can independently each other as required not be connected in parallel.LA1-LAN, LB1-LBN, LC1-LCN be for suppressing the connection reactor of inverter output current, and these reactors can be substituted by the leakage reactance of each inversion side winding of three-phase multi-winding isolation transformer.TR is for being coupled into each inverter bridge output voltage, electric current the three-phase multi-winding isolation transformer of total inverter output voltage and electric current, this three-phase multi-winding isolation transformer is every to be made up of an output side winding and N inversion side winding, the three-phase output side winding is exported as the three-phase alternating current of inverter after connecting into star or delta connection, receives the ac output end of a single-phase full bridge voltage source inverter bridge behind described connection reactor of each windings in series of three-phase inversion side.Electrical characteristic when this three-phase multi-winding isolation transformer can be according to concrete use adopts three core limbs or five core limb structures.Control is with protector acquisition system three-phase voltage, by compensating load three-phase current, device output three-phase current, device dc capacitor voltage, device voltage source inverter bridge output current; pass through control algolithm; form device control wave and defencive function, thereby reach load acrobatic skill compensation target.Single-phase two level voltage source inverter bridge among Fig. 1 adopt the single-phase two level voltage source inverter bridge of standard among Fig. 3.The single-phase two level voltage source inverter bridge of standard are made up of four power semiconductor switches (as IGBT, IGCT, IEGT etc.) and four power diodes, every power semiconductor switch is connected with a power diode reverse parallel connection, and this inverter bridge is opened/turn-offed combination and direct voltage (DC+/DC-) can be transformed into three-level AC stream voltage output (AC1/AC2) (phase voltage is two level) by switching device.
Device when the utility model adopts single-phase three-level voltage source inverter bridge constitutes embodiment as shown in Figure 2, CA1+/CA1--CAN+/CAN-among Fig. 2, CB1+/CB1--CBN+/CBN-, CC1+/CC1--CCN+/CCN-are respectively the direct current capacitor group that forms direct voltage source, can be connected in parallel as shown in Figure 2 between direct current capacitor group positive pole, zero utmost point and the negative pole, also can independently each other as required not be connected in parallel.LA1-LAN, LB1-LBN, LC1-LCN be for suppressing the connection reactor of inverter output current, and these reactors can be substituted by the leakage reactance of each inversion side winding of three-phase multi-winding isolation transformer.TR is for being coupled into each inverter bridge output voltage, electric current the three-phase multi-winding isolation transformer of total inverter output voltage and electric current, this three-phase multi-winding isolation transformer is every to be made up of an output side winding and N inversion side winding, the three-phase output side winding is exported as the three-phase alternating current of inverter after connecting into star or delta connection, receives the ac output end of a single-phase full bridge voltage source inverter bridge behind described connection reactor of each windings in series of three-phase inversion side.Electrical characteristic when this three-phase multi-winding isolation transformer can be according to concrete use adopts three core limbs or five core limb structures.Control is with protector acquisition system three-phase voltage, by compensating load three-phase current, device output three-phase current, device dc capacitor voltage, device voltage source inverter bridge output current; pass through control algolithm; form device control wave and defencive function, thereby reach load acrobatic skill compensation target.Single-phase three-level voltage source inverter bridge among Fig. 2 adopts the single-phase three-level voltage source inverter bridge of standard among Fig. 4.The single-phase three-level voltage source inverter bridge of standard is made up of eight power semiconductor switches (as IGBT, IGCT, IEGT etc.) and 12 power diodes, every power semiconductor switch is connected with a power diode reverse parallel connection, other four power diodes play the effect of clamping diode, and this inverter bridge is opened/turn-offed combination and direct voltage (DC+/DCO/DC-) can be transformed into five level alternating voltages output (AC1/AC2) (phase voltage is three level) by switching device.
When the utility model adopts different power semiconductor switches, need the overcurrent of opening of configuration respective standard to absorb circuit or clamp circuit with the shutoff overvoltage.
Claims (4)
1. the main circuit of a transformer isolation type stillness wattless occurrence apparatus, it is characterized in that: comprise N A phase full-bridge voltage source inverter bridge, N B phase full-bridge voltage source inverter bridge, N C phase full-bridge voltage source inverter bridge, the three-phase multi-winding isolation transformer, described N A phase full-bridge voltage source inverter bridge, N B phase full-bridge voltage source inverter bridge, N C phase full-bridge voltage source inverter bridge is single-phase full bridge voltage source inverter bridge, the corresponding input parallel connection of each single-phase full bridge voltage source inverter bridge, the input of each single-phase full bridge voltage source inverter bridge is parallel with direct current capacitor, and the output of each single-phase full bridge voltage source inverter bridge is received the inversion side winding of three-phase multi-winding isolation transformer through reactor; The three-phase multi-winding isolation transformer is every to be made up of an output side winding and N inversion side winding, and the three-phase output side winding is received system voltage source as the three-phase alternating current output of inverter after connecting into star or delta connection, and N is a positive integer.
2. the main circuit of transformer isolation type stillness wattless occurrence apparatus according to claim 1 is characterized in that: described single-phase full bridge voltage source inverter bridge adopts the single-phase two level voltage source inverter bridge or the single-phase three-level voltage source inverter bridge of standard.
3. the main circuit of transformer isolation type stillness wattless occurrence apparatus according to claim 1 is characterized in that: described three-phase multi-winding isolation transformer adopts three core limbs or five core limb structures.
4. the main circuit of transformer isolation type stillness wattless occurrence apparatus according to claim 1 is characterized in that: described reactor can be substituted by the leakage reactance of each inversion side winding of three-phase multi-winding isolation transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050489 CN2798390Y (en) | 2005-03-16 | 2005-03-16 | Main circuit for insulating type static reactive generator of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050489 CN2798390Y (en) | 2005-03-16 | 2005-03-16 | Main circuit for insulating type static reactive generator of transformer |
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| Publication Number | Publication Date |
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| CN2798390Y true CN2798390Y (en) | 2006-07-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200520050489 Expired - Fee Related CN2798390Y (en) | 2005-03-16 | 2005-03-16 | Main circuit for insulating type static reactive generator of transformer |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101494382B (en) * | 2009-03-11 | 2012-05-09 | 张皓 | Large-capacity stillness wattless occurrence apparatus |
| CN102751731A (en) * | 2012-07-10 | 2012-10-24 | 山东新风光电子科技发展有限公司 | High voltage dynamic reactive compensation device |
| CN102308461B (en) * | 2009-02-06 | 2015-03-11 | Abb研究有限公司 | A hybrid distribution transformer with AC & DC power capabilities |
-
2005
- 2005-03-16 CN CN 200520050489 patent/CN2798390Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102308461B (en) * | 2009-02-06 | 2015-03-11 | Abb研究有限公司 | A hybrid distribution transformer with AC & DC power capabilities |
| CN101494382B (en) * | 2009-03-11 | 2012-05-09 | 张皓 | Large-capacity stillness wattless occurrence apparatus |
| CN102751731A (en) * | 2012-07-10 | 2012-10-24 | 山东新风光电子科技发展有限公司 | High voltage dynamic reactive compensation device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Free format text: FORMER OWNER: LIU WENHUA Owner name: SIYUAN QINGNENG ELECTRICAL APPLIANCES ELECTRONIC C Free format text: FORMER OWNER: LIU WENHUI Effective date: 20100524 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 410009 NO.208, BUILDING 7, XINTIAN RESIDENTIAL QUATER, XINKAIPU, CHANGSHA CITY, HUNAN PROVINCE TO: 201108 DISTRICT F, BUILDING 2, NO.999 ZHUANXING ROAD, MINXING DISTRICT, SHANGHAI CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100524 Address after: 201108 Shanghai city Minhang District Zhuan Hing Road No. 999 Building 2 F zone Patentee after: Sieyuan Qingneng Power Electronic Co., Ltd. Address before: 410009 No. 7, No. 208, Xintian District, Changsha, Hunan Co-patentee before: Liu Wenhua Patentee before: Liu Wenhui |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 Termination date: 20140316 |