CN100442648C - Hybrid converter of high voltage DC transmission system - Google Patents
Hybrid converter of high voltage DC transmission system Download PDFInfo
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- CN100442648C CN100442648C CNB2006100205191A CN200610020519A CN100442648C CN 100442648 C CN100442648 C CN 100442648C CN B2006100205191 A CNB2006100205191 A CN B2006100205191A CN 200610020519 A CN200610020519 A CN 200610020519A CN 100442648 C CN100442648 C CN 100442648C
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Abstract
The present invention relates to a hybrid converter of a high voltage DC transmission system, which respectively combines a converter of a traditional high voltage DC transmission system and a converter without a transformer or a converter of a capacitor with phase conversion so as to form the new hybrid converter of the high voltage DC transmission system. The present invention can overcome the original disadvantages of various converters, improve the dynamic performance of the high voltage DC transmission system, reduce harmonic, reduce wattless loss, raise the voltage level of DC transmission, enlarge transmission power in long distance and save investment.
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
1,18 pulse waves that constitute of 12 pulse wave converters of traditional band transformer and transless 6 pulse wave converters mix current transformer: two 6 pulse wave converter bridges of 12 pulse wave converters of traditional band transformer are connected with first DC power transmission line in DC side series connection back, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer respectively in AC side; A secondary winding of transformer is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and transformer is connected with ac bus through first circuit breaker; Transformerless 6 pulse wave converter bridges are connected with ac bus by second circuit breaker in AC side, connect with 12 traditional pulse wave converter bridges at DC side one end, and the other end is connected with second DC power transmission line.
2, the 18 pulse wave hybrid converters that constitute of the converter 6 pulse wave converters of 12 pulse wave converters of traditional band transformer and transformerless capacitor commutation: two 6 pulse wave converter bridges of 12 traditional pulse wave converters are the DC side end ground connection afterwards of connect, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer respectively in AC side; A secondary winding of transformer is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer is connected with ac bus by first circuit breaker; Transformerless 6 pulse wave converter bridges are connected with ac bus with second circuit breaker at the capacitor of AC side by band overvoltage protection zinc oxide varistor, connect with 12 traditional pulse wave converter bridges at DC side one end, and the other end is connected with first DC power transmission line.
3, the 18 pulse wave hybrid converters that constitute of the transless 6 pulse wave converters of 12 pulse wave converters of traditional band transformer and controllable capacitor commutation: two 6 pulse wave converter bridges of 12 traditional pulse wave converters are the DC side end ground connection afterwards of connect, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer respectively in AC side; A secondary winding of transformer is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer is connected with ac bus by first circuit breaker; Transformerless 6 pulse wave converter bridges are connected with ac bus with second circuit breaker with the capacitor of turn-off thyristor by band overvoltage protection zinc oxide varistor in AC side; connect with 12 traditional pulse wave converter bridges at DC side one end, the other end is connected with first DC power transmission line.
4,12 pulse wave converters of traditional band transformer constitute 18 pulse wave hybrid converters with the transless 6 pulse wave converters of controllable series compensation commutation: two 6 pulse wave converter bridges of 12 traditional pulse wave converters are connected with two secondary windings of 30 ° of the phase shifts each other of transformer respectively in AC side the DC side back one end ground connection of connecting; A secondary winding of transformer is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer is connected with ac bus by first circuit breaker; Transformerless 6 pulse wave converter bridges are connected after second circuit breaker is connected with ac bus with the control loop that reactor constitutes with turn-off thyristor by the capacitor at band overvoltage protection zinc oxide varistor in AC side; connect with 12 traditional pulse wave converter bridges at DC side one end, the other end is connected with first DC power transmission line.
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 pulse wave converters of traditional band transformer and the 18 pulse wave hybrid converter circuit theory diagrams that transless 6 pulse wave converters constitute.
Fig. 2 is the 18 pulse wave hybrid converter circuit theory diagrams that the transless 6 pulse wave converters of 12 pulse wave converters of traditional band transformer and capacitor commutation constitute.
Fig. 3 is the 18 pulse wave hybrid converter circuit theory diagrams that the transless 6 pulse wave converters of 12 pulse wave converters of traditional band transformer 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 12 pulse wave converters of traditional band transformer and controllable series compensation commutation constitute.
1,2,3 converter bridges, 4 first DC power transmission line, 5 transformers, 6 first circuit breakers, 7 second circuit breakers, 8 ac bus, 9 second DC power transmission line, 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 pulse wave converters of traditional band transformer are mixed current transformer with 18 pulse waves that transless 6 pulse wave converters constitute: two the 6 pulse wave converter bridges 1,2 of 12 pulse wave converters of traditional band transformer are connected with first DC power transmission line 4 in DC side series connection back, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer 5 respectively in AC side; A secondary winding of transformer 5 is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer 5 is connected with ac bus 8 through first circuit breaker 6; Transformerless 6 pulse wave converter bridges 3 are connected 8 with ac bus in AC side by second circuit breaker 7, connect with 12 pulse wave converter bridges 1,2 of traditional band transformer at DC side one end, and the other end is connected with second DC power transmission line 9.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 pulse wave converters of traditional band transformer and transformerless capacitor commutation are constituted: two the 6 pulse wave converter bridges 1,2 of 12 pulse wave converters of traditional band transformer are the DC side end ground connection afterwards of connect, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer 5 respectively in AC side; A secondary winding of transformer 5 is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer 5 is connected with ac bus 8 by first circuit breaker 6; Transformerless 6 pulse wave converter bridges 3 are connected with ac bus 8 with second circuit breaker 7 at the capacitor 10 of AC side by band overvoltage protection zinc oxide varistor 11; connect with 12 pulse wave converter bridges 1,2 of traditional band transformer at DC side one end, the other end is connected with first DC power transmission line 4.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 pulse wave converters of traditional band transformer and controllable capacitor commutation are constituted: two the 6 pulse wave converter bridges 1,2 of 12 pulse wave converters of traditional band transformer are the DC side end ground connection afterwards of connect, are connected with two secondary windings of 30 ° of the phase shifts each other of transformer 5 respectively in AC side; A secondary winding of transformer 5 is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer 5 is connected with ac bus 8 by first circuit breaker 6; Transformerless 6 pulse wave converter bridges 3 are connected with ac bus 8 with second circuit breaker 7 at the capacitor 10 of AC side by band overvoltage protection zinc oxide varistor 11 and turn-off thyristor 12; connect with 12 traditional pulse wave converter bridges 1,2 at DC side one end, the other end is connected with first DC power transmission line 4.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 pulse wave converters of traditional band transformer are constituted 18 pulse wave hybrid converters with the transless 6 pulse wave converters of controllable series compensation commutation: two the 6 pulse wave converter bridges 1,2 of 12 pulse wave converters of traditional band transformer are connected with two secondary windings of 30 ° of the phase shifts each other of transformer 5 respectively in AC side the DC side back one end ground connection of connecting; A secondary winding of transformer 5 is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer 5 is connected with ac bus 8 by first circuit breaker 6; Transformerless 6 pulse wave converter bridges 3 are connected after second circuit breaker 7 is connected with ac bus 8 with the control loop that reactor 13 constitutes with turn-off thyristor 12 by the capacitor 10 at band overvoltage protection zinc oxide varistor 11 in AC side; connect with 12 traditional pulse wave converter bridges 1,2 at DC side one end, the other end is connected with first DC power transmission line 4.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 12 pulse wave converters of traditional band transformer and 18 pulse waves that transless 6 pulse wave converters constitute mix current transformer: two 6 pulse wave converter bridges (1 of 12 pulse wave converters of traditional band transformer, 2) be connected with first DC power transmission line (4) at DC side series connection back one end, be connected with two secondary windings of 30 ° of the phase shifts each other of transformer (5) respectively in AC side; A secondary winding of transformer (5) is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer (5) is connected with ac bus (8) through first circuit breaker (6); Transformerless 6 pulse wave converter bridges (3) are connected with ac bus (8) by second circuit breaker (7) in AC side, and in DC side one end and traditional 12 pulse wave converter bridges (1,2) series connection, the other end is connected with second DC power transmission line (9).
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 pulse wave converters of traditional band transformer and transformerless capacitor commutation constitute: two 6 pulse wave converter bridges (1 of 12 pulse wave converters of traditional band transformer, 2), be connected with two secondary windings of 30 ° of the phase shifts each other of transformer (5) respectively in AC side DC side series connection back one end ground connection; A secondary winding of transformer (5) is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer (5) is connected with ac bus (8) by first circuit breaker (6); Transformerless 6 pulse wave converter bridges (3) are connected with ac bus (8) with second circuit breaker (7) at the capacitor (10) of AC side by band overvoltage protection zinc oxide varistor (11); 12 pulse wave converter bridges (1 at DC side one end and traditional band transformer; 2) series connection, the other end is connected with first DC power transmission line (4).
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 pulse wave converters of traditional band transformer and controllable capacitor commutation constitute: two 6 pulse wave converter bridges (1 of 12 pulse wave converters of traditional band transformer, 2), be connected with two secondary windings of 30 ° of the phase shifts each other of transformer (5) respectively in AC side DC side series connection back one end ground connection; A secondary winding of transformer (5) is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer (5) is connected with ac bus (8) by first circuit breaker (6); Transformerless 6 pulse wave converter bridges (3) are connected with ac bus (8) with second circuit breaker (7) with the capacitor (10) of turn-off thyristor (12) by band overvoltage protection zinc oxide varistor (11) in AC side; 12 pulse wave converter bridges (1 at DC side one end and traditional band transformer; 2) series connection, the other end is connected with first DC power transmission line (4).
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 the 12 pulse wave converters of traditional band transformer and the transless 6 pulse wave converters of controllable series compensation commutation constitute 18 pulse wave hybrid converters: two 6 pulse wave converter bridges (1 of 12 pulse wave converters of traditional band transformer, 2), be connected with two secondary windings of 30 ° of the phase shifts each other of transformer (5) respectively in AC side DC side series connection back one end ground connection; A secondary winding of transformer (5) is that Y/Y-11 is connected with former limit winding, and another secondary winding is that Y/ Δ-10 is connected with former limit winding, and the former limit winding of transformer (5) is connected with ac bus (8) by first circuit breaker (6); Transformerless 6 pulse wave converter bridges (3) are connected after second circuit breaker (7) is connected with ac bus (8) with the control loop that reactor (13) constitutes with turn-off thyristor (12) by the capacitor (10) at band overvoltage protection zinc oxide varistor (11) in AC side; 12 pulse wave converter bridges (1 at DC side one end and traditional band transformer; 2) series connection, the other end is connected with first DC power transmission line (4).
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| Application Number | Priority Date | Filing Date | Title |
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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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| CNB2006100205191A CN100442648C (en) | 2006-03-21 | 2006-03-21 | Hybrid converter of high voltage DC transmission system |
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| CN100442648C true CN100442648C (en) | 2008-12-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337972A (en) * | 2013-05-22 | 2013-10-02 | 华中科技大学 | Mixed type transverter and wind power generation system |
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|---|---|---|---|---|
| US9099936B2 (en) | 2013-03-14 | 2015-08-04 | General Electric Company | High voltage direct current (HVDC) converter system and method of operating the same |
| 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 |
| US9602021B2 (en) | 2014-03-07 | 2017-03-21 | General Electric Company | Hybrid high voltage direct current 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 |
| 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 |
| 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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| CN1030362C (en) * | 1990-08-17 | 1995-11-22 | 西屋电气公司 | Optimized 18-pulse type AC/DC, or DC/AC, converter system |
| US20040085703A1 (en) * | 2002-10-30 | 2004-05-06 | Kim Chan Ki | Multi-pulse HVDC system using auxiliary circuit |
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2006
- 2006-03-21 CN CNB2006100205191A patent/CN100442648C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1030362C (en) * | 1990-08-17 | 1995-11-22 | 西屋电气公司 | Optimized 18-pulse type AC/DC, or DC/AC, converter system |
| US20040085703A1 (en) * | 2002-10-30 | 2004-05-06 | Kim Chan Ki | Multi-pulse HVDC system using auxiliary circuit |
Non-Patent Citations (4)
| Title |
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| HVDC系统电容换相换流器特性分析. 任震，何畅炜，高明振.中国电机工程学报，第19卷第3期. 1999 |
| HVDC系统电容换相换流器特性分析. 任震，何畅炜，高明振.中国电机工程学报，第19卷第3期. 1999 * |
| 电压源型AC/DC换流器的运行机理和特性分析. 马林，俞晓荣，苏宏营，廖培金.继电器，第30卷第10期. 2002 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103337972A (en) * | 2013-05-22 | 2013-10-02 | 华中科技大学 | Mixed type transverter and wind power generation system |
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