CN1832318A - Hybrid converter of high voltage DC transmission system - Google Patents
Hybrid converter of high voltage DC transmission system Download PDFInfo
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- CN1832318A CN1832318A CN 200610020519 CN200610020519A CN1832318A CN 1832318 A CN1832318 A CN 1832318A CN 200610020519 CN200610020519 CN 200610020519 CN 200610020519 A CN200610020519 A CN 200610020519A CN 1832318 A CN1832318 A CN 1832318A
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Abstract
This invention relates to a sophisticated converter of a high voltage DC transmission system, which combines converters of a traditional high voltage DC transmission system and transformerless or condenser phase change to constitute a sophisticated converter of a new high voltage DC transmission system.
Description
Technical field
The present invention relates to a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system, this converter comprises rectifier and inverter, and it is applicable to the occasion that interchange is become direct current or direct current is become interchange.
Background technology
It is elementary cell that 6 pulse waves (Graetz) that the converter of traditional HVDC (High Voltage Direct Current) transmission system constitutes with thyristor change the ripple bridge.In order to reduce harmonic wave, in actual engineering, adopt two 6 pulse wave converter bridges to connect usually in DC side, pass through two transformers connected in parallel of 30 ° of phase shifts each other in AC side: one is that Y/Y connects, and another connects for the Y/ Δ, forms 12 pulse wave converters.If further reduce harmonic wave, can constitute 18 pulse waves with a plurality of 6 pulse wave converter bridges at the DC side serial or parallel connection, 24 pulse waves, the multiple pulse wave converter of 36 pulse waves etc. 6, but must increase corresponding transformer.Converter transformer occupies significant proportion in the investment of the current conversion station of HVDC (High Voltage Direct Current) transmission system, and floor space is big, increases meritorious and reactive loss.The reactance of converter has increased the folded arc angle of commutation, is one of reason that causes commutation failure and operation difficulty.
A large amount of reactive powers of the converter consumption of traditional HVDC (High Voltage Direct Current) transmission system must be carried out reactive power compensation, when being connected with weak AC system, and the bad dynamic performance of system, inverter is easy to generate commutation failure, the operation difficulty.
Along with the progress of power electronic technology, the corresponding birth of new converter topological structure: as the converter (CCC) of transless converter (NTC) and capacitor commutation with control method.Though the transless converter has been saved converter transformer, the control characteristic of system is relatively poor.The converter of capacitor commutation has improved commutation voltage, has enlarged the range of operation of the trigger angle of converter, and inverter is not easy to produce commutation failure, has also reduced the reactive loss of converter.Particularly improve the dynamic property of DC transmission system, when very weak AC system is connected, can not cause the difficulty of operation, but overvoltage problem requires study, also fail to be used for the HVDC (High Voltage Direct Current) transmission system of voltage levels.
Summary of the invention
The objective of the invention is to provide a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system at the deficiencies in the prior art.It is that the combination respectively of the converter of capacitor commutation constitutes new hybrid converter with the converter of traditional HVDC (High Voltage Direct Current) transmission system and the converter of no power transformation depressor.
Purpose of the present invention is realized by following technical measures:
The hybrid converter of HVDC (High Voltage Direct Current) transmission system
1,12 traditional pulse wave converters mix current transformer with 18 pulse waves that transless 6 pulse wave converters constitute: 12 traditional pulse wave converters are connected with DC power transmission line in DC side series connection back by two 6 pulse wave converter bridges, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus through circuit breaker; One end of transformerless 6 pulse wave converter bridges is connected with ac bus by circuit breaker in AC side, and the other end of converter bridge is connected with DC power transmission line with 6 pulse wave converter bridges series connection back in DC side.Or
2, the 18 pulse wave hybrid converters that constitute of traditional 12 pulse wave converters and the converter 6 pulse wave converters of transformerless capacitor commutation: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges the DC side end ground connection afterwards of connecting, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus by circuit breaker; One end of transformerless 6 pulse wave converter bridges is connected with ac bus with circuit breaker at the capacitor of AC side by band overvoltage protection zinc oxide varistor, and the other end of converter bridge is connected with DC power transmission line with 6 pulse wave converter bridges series connection back in DC side.Or
3, the 18 pulse wave hybrid converters that constitute of traditional 12 pulse wave converters and the transless 6 pulse wave converters of controllable capacitor commutation: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges the DC side end ground connection afterwards of connecting, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus by circuit breaker; One end of transformerless 6 pulse wave converter bridges is connected with ac bus with circuit breaker with the capacitor of turn-off thyristor by band overvoltage protection zinc oxide varistor in AC side, and the other end of converter bridge is connected with DC power transmission line with 6 pulse wave converter bridges series connection back in DC side.Or
4,12 traditional pulse wave converters constitute 18 pulse wave hybrid converters with the transless 6 pulse wave converters of controllable series compensation commutation: 12 traditional pulse wave converters and two 6 pulse wave converter bridges end ground connection after DC side is connected, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, be connected with ac bus by circuit breaker; By being connected with ac bus by circuit breaker after the capacitor of band overvoltage protection zinc oxide varistor and control loop parallel connection that turn-off thyristor and reactor constitute, the other end of converter bridge is connected with DC power transmission line after DC side and 6 pulse wave converter bridges are connected one end of transformerless 6 pulse wave converter bridges in AC side.
The present invention has following advantage:
1, improves the dynamic property of HVDC (High Voltage Direct Current) transmission system, reduce harmonic wave, reduce reactive loss, reduce investment outlay.
2, improve the electric pressure of direct current transportation, enlarge the power of long distance power transmission.
Description of drawings
Fig. 1 is 12 traditional pulse wave converters and 18 pulse wave hybrid converter circuit theory diagrams of transless 6 pulse wave converters formation.
Fig. 2 is the 18 pulse wave hybrid converter circuit theory diagrams that the transless 6 pulse wave converters of traditional 12 pulse wave converters and capacitor commutation constitute.
Fig. 3 is the 18 pulse wave hybrid converter circuit theory diagrams that the transless 6 pulse wave converters of traditional 12 pulse wave converters and controllable capacitor commutation constitute.
Fig. 4 is the 18 pulse wave hybrid converter circuit theory diagrams that the transless 6 pulse wave converters of traditional 12 pulse wave converters and controllable series compensation commutation constitute.
1,2,3 converter bridges, 4,9 AC line, 5 transformers, 6,7 circuit breakers, 8 ac bus, 10 capacitors, 11 overvoltage protection zinc oxide varistors, 12 turn-off thyristors, 13 reactors.
Embodiment
Below by embodiment the present invention is carried out concrete description; be necessary to be pointed out that at this present embodiment only is used for the present invention is further specified; can not be interpreted as limiting the scope of the invention, the person skilled in the art in this field can make some nonessential improvement and adjustment according to the content of the invention described above.
Embodiment
The hybrid converter of HVDC (High Voltage Direct Current) transmission system as shown in Figure 1,12 traditional pulse wave converters are mixed current transformer with 18 pulse waves that transless 6 pulse wave converters constitute: 12 traditional pulse wave converters are connected with DC power transmission line 4 in DC side series connection back by two 6 pulse wave converter bridges 1,2, two secondary windings 30 ° of the phase shift each other of AC side by transformer 5: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus 8 through circuit breaker 6; One end of transformerless 6 pulse wave converter bridges 3 is connected 8 by circuit breaker 7 with ac bus in AC side, and the other end of converter bridge 3 is connected with DC power transmission line 9 with 6 pulse wave converter bridges, 1,2 series connection backs in DC side.Its advantage is: save transformer, improve electric pressure and reduce harmonic wave.
The hybrid converter of HVDC (High Voltage Direct Current) transmission system as shown in Figure 2, the 18 pulse wave hybrid converters that the converter 6 pulse wave converters of 12 traditional pulse wave converters and transformerless capacitor commutation are constituted: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges 1,2 DC side series connection back one end ground connection, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus 8 by circuit breaker 6; One end of transformerless 6 pulse wave converter bridges 3 is connected with ac bus 8 with circuit breaker 7 at the capacitor 10 of AC side by band overvoltage protection zinc oxide varistor 11, and the other end of converter bridge 3 is connected with DC power transmission line 4 with 6 pulse wave converter bridges, 1,2 series connection backs in DC side.Its advantage is: save transformer, improve electric pressure, reduce the dynamic property of harmonic wave and raising system.
The hybrid converter of HVDC (High Voltage Direct Current) transmission system as shown in Figure 3, the 18 pulse wave hybrid converters that the transless 6 pulse wave converters of 12 traditional pulse wave converters and controllable capacitor commutation are constituted: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges 1,2 the DC side end ground connection afterwards of connecting, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus 8 by circuit breaker 6; One end of transformerless 6 pulse wave converter bridges 3 is connected with ac bus 8 with circuit breaker 7 at the capacitor 10 of AC side by band overvoltage protection zinc oxide varistor 11 and turn-off thyristor 12, and the other end of converter bridge 3 is connected with DC power transmission line 4 with 6 pulse wave converter bridges, 1,2 series connection backs in DC side.Its advantage is: save transformer, improve electric pressure, reduce the dynamic property of harmonic wave and raising system, and further improve the control performance of system.
The hybrid converter of HVDC (High Voltage Direct Current) transmission system as shown in Figure 4,12 traditional pulse wave converters are constituted 18 pulse wave hybrid converters with the transless 6 pulse wave converters of controllable series compensation commutation: 12 traditional pulse wave converters and two 6 pulse wave converter bridges 1,2 end ground connection after DC side is connected, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, be connected with ac bus 8 by circuit breaker 6; By being connected with ac bus 8 by circuit breaker 7 after the capacitor 10 of band overvoltage protection zinc oxide varistor 11 and control loop parallel connection that turn-off thyristor 12 and reactor 13 constitute, the other end of converter bridge 3 is connected with DC power transmission line 4 after DC side and 6 pulse wave converter bridges 1,2 are connected one end of transformerless 6 pulse wave converter bridges 3 in AC side.Its advantage is: save transformer, improve electric pressure, reduce the dynamic property of harmonic wave and raising system, and further improve the control performance of system.
Claims (4)
1, a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system, contain traditional converter and the transformerless converter of being with transformer, it is characterized in that 18 pulse waves that 12 traditional pulse wave converters and transless 6 pulse wave converters constitute mix current transformer: 12 traditional pulse wave converters are by two 6 pulse wave converter bridges (1), (2) be connected with DC power transmission line (4) in DC side series connection back, two secondary windings 30 ° of the phase shift each other of AC side by transformer (5): one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus (8) through circuit breaker (6); One end of transformerless 6 pulse wave converter bridges (3) is connected with ac bus (8) by circuit breaker (7) in AC side, and the other end of converter bridge (3) is connected with DC power transmission line (9) with 6 pulse wave converter bridges (1) (2) series connection back in DC side.Or
2, a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system, contain the traditional converter of being with transformer and the converter of transformerless capacitor commutation, it is characterized in that the 18 pulse wave hybrid converters that the converter 6 pulse wave converters of 12 traditional pulse wave converters and transformerless capacitor commutation constitute: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges (1) (2) the DC side end ground connection afterwards of connecting, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus (8) by circuit breaker (6); One end of transformerless 6 pulse wave converter bridges (3) is connected with ac bus (8) with circuit breaker (7) at the capacitor (10) of AC side by band overvoltage protection zinc oxide varistor (11), and the other end of converter bridge (3) is connected with DC power transmission line (4) with 6 pulse wave converter bridges (1) (2) series connection back in DC side.Or
3, a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system, contain the traditional converter of being with transformer and the converter of transformerless controlled capacitance commutation, it is characterized in that the 18 pulse wave hybrid converters that the transless 6 pulse wave converters of 12 traditional pulse wave converters and controllable capacitor commutation constitute: 12 traditional pulse wave converters with by two 6 pulse wave converter bridges (1) (2) the DC side end ground connection afterwards of connecting, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, transformer is connected with ac bus (8) by circuit breaker (6); One end of transformerless 6 pulse wave converter bridges (3) is connected with ac bus (8) with circuit breaker (7) with the capacitor (10) of turn-off thyristor (12) by band overvoltage protection zinc oxide varistor (11) in AC side, and the other end of converter bridge (3) is connected with DC power transmission line (4) with 6 pulse wave converter bridges (1) (2) series connection back in DC side.Or
4, a kind of hybrid converter of HVDC (High Voltage Direct Current) transmission system, the converter that contains the traditional converter of being with transformer and the commutation of no transformation controllable series compensation, it is characterized in that 12 traditional pulse wave converters constitute 18 pulse wave hybrid converters with the transless 6 pulse wave converters of controllable series compensation commutation: 12 traditional pulse wave converters and two 6 pulse wave converter bridges (1) (2) end ground connection after DC side is connected, two secondary windings 30 ° of the phase shift each other of AC side by transformer: one is that Y/Y-11 is connected with former limit winding, another is that Y/ Δ-10 is connected with former limit winding, perhaps use two transformers connected in parallel, be connected with ac bus (8) by circuit breaker (6); One end of transformerless 6 pulse wave converter bridges (3) is connected with ac bus (8) by circuit breaker (7) after the control loop parallel connection that AC side constitutes by capacitor (10) and turn-off thyristor (12) and reactor (13) at band overvoltage protection zinc oxide varistor (11), and the other end of converter bridge (3) is connected with DC power transmission line (4) after DC side and 6 pulse wave converter bridges (1) (2) are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100205191A CN100442648C (en) | 2006-03-21 | 2006-03-21 | Hybrid converter of high voltage DC transmission system |
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| CNB2006100205191A CN100442648C (en) | 2006-03-21 | 2006-03-21 | Hybrid converter of high voltage DC transmission system |
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| CN1832318A true CN1832318A (en) | 2006-09-13 |
| CN100442648C CN100442648C (en) | 2008-12-10 |
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| CNB2006100205191A Expired - Fee Related CN100442648C (en) | 2006-03-21 | 2006-03-21 | Hybrid converter of high voltage DC transmission system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103618332A (en) * | 2013-11-27 | 2014-03-05 | 国家电网公司 | Method for controlling controllable capacitor in CSCC-HVDC system |
| WO2014187181A1 (en) * | 2013-05-22 | 2014-11-27 | 华中科技大学 | Hybrid converter and wind power generation system |
| US9099936B2 (en) | 2013-03-14 | 2015-08-04 | General Electric Company | High voltage direct current (HVDC) converter system and method of operating the same |
| US9515565B2 (en) | 2014-03-07 | 2016-12-06 | General Electric Company | Hybrid high voltage direct current converter systems |
| US9602021B2 (en) | 2014-03-07 | 2017-03-21 | General Electric Company | Hybrid high voltage direct current converter system and method of operating the same |
| CN106655143A (en) * | 2016-11-16 | 2017-05-10 | 合肥普望电子有限责任公司 | Three-phase combined overvoltage protector |
| CN110912183A (en) * | 2019-10-31 | 2020-03-24 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing multiple types of renewable energy sources |
| CN113037107A (en) * | 2021-03-04 | 2021-06-25 | 广东电网有限责任公司 | Topological structure of power electronic transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU644153B2 (en) * | 1990-08-17 | 1993-12-02 | Westinghouse Electric Corporation | Optimized 18-pulse type AC/DC, or DC/AC, converter system |
| KR20040037857A (en) * | 2002-10-30 | 2004-05-08 | 한국전력공사 | Multi-pulse transmission system |
-
2006
- 2006-03-21 CN CNB2006100205191A patent/CN100442648C/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9099936B2 (en) | 2013-03-14 | 2015-08-04 | General Electric Company | High voltage direct current (HVDC) converter system and method of operating the same |
| WO2014187181A1 (en) * | 2013-05-22 | 2014-11-27 | 华中科技大学 | Hybrid converter and wind power generation system |
| US9502991B2 (en) | 2013-05-22 | 2016-11-22 | Huazhong University Of Science And Technology | Hybrid converter and wind power generating system |
| CN103618332A (en) * | 2013-11-27 | 2014-03-05 | 国家电网公司 | Method for controlling controllable capacitor in CSCC-HVDC system |
| CN103618332B (en) * | 2013-11-27 | 2016-01-20 | 国家电网公司 | The control method of controlled capacitance in a kind of CSCC-HVDC system |
| US9515565B2 (en) | 2014-03-07 | 2016-12-06 | General Electric Company | Hybrid high voltage direct current converter systems |
| US9602021B2 (en) | 2014-03-07 | 2017-03-21 | General Electric Company | Hybrid high voltage direct current converter system and method of operating the same |
| CN106655143A (en) * | 2016-11-16 | 2017-05-10 | 合肥普望电子有限责任公司 | Three-phase combined overvoltage protector |
| CN110912183A (en) * | 2019-10-31 | 2020-03-24 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing multiple types of renewable energy sources |
| CN110912183B (en) * | 2019-10-31 | 2023-12-22 | 格瑞美科技(武汉)有限公司 | Power generation system topological structure containing various renewable energy sources |
| CN113037107A (en) * | 2021-03-04 | 2021-06-25 | 广东电网有限责任公司 | Topological structure of power electronic transformer |
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| CN100442648C (en) | 2008-12-10 |
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