特高压混合多端直流线路保护配置与配合研究
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摘要
特高压多端混合直流可提供更大容量、更经济和更灵活的输电方式,并兼顾了常规直流和柔性直流的技术优势。特高压多端混合直流与两端直流保护系统相比,在线路保护方面差异最大。采用全桥和半桥混合拓扑的特高压柔性直流输电换流器,具有直流线路故障自清除特性,因此对直流线路故障的处理要求也不同于采用半桥结构的多端柔性直流系统。基于特高压混合多端直流输电系统对线路故障处理的需求,分析了该系统直流线路保护的关键问题,并提出了直流线路保护配置方案和直流线路保护的配合策略,最后基于PSCAD/EMTDC仿真模型验证了所提出方案的可行性和有效性。
Multi-terminal hybrid UHVDC system can provide a larger capacity,more economical and more flexible transmission mode,taking into account the technical advantages of LCC and VSC.Compared with the two-terminal DC protection system,the DC line protection is the most different in multi-terminal UHVDC system.Hybrid modular multilevel converters(MMC) based VSC comprising of half-bridge(HBSM) and full-bridge sub-modules(FBSM) has the characteristics of fault self-clearance of HVDC lines.Therefore,the demands for DC line protection in this system are different from multi-terminal VSC-HVDC systems with HBSM topology.Based on the requirements for DC line fault identification and clearing of multi-terminal hybrid UHVDC transmission system,the key problems of DC line protection in the system are analyzed.DC line protection configuration and the coordination strategy of DC line protection are also proposed in this paper.Finally,based on PSCAD/EMTDC simulation,the feasibility and validity of the proposed scheme are verified.
Multi-terminal hybrid UHVDC system can provide a larger capacity,more economical and more flexible transmission mode,taking into account the technical advantages of LCC and VSC.Compared with the two-terminal DC protection system,the DC line protection is the most different in multi-terminal UHVDC system.Hybrid modular multilevel converters(MMC) based VSC comprising of half-bridge(HBSM) and full-bridge sub-modules(FBSM) has the characteristics of fault self-clearance of HVDC lines.Therefore,the demands for DC line protection in this system are different from multi-terminal VSC-HVDC systems with HBSM topology.Based on the requirements for DC line fault identification and clearing of multi-terminal hybrid UHVDC transmission system,the key problems of DC line protection in the system are analyzed.DC line protection configuration and the coordination strategy of DC line protection are also proposed in this paper.Finally,based on PSCAD/EMTDC simulation,the feasibility and validity of the proposed scheme are verified.
引文
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[15]郭铸,刘涛,陈名,等.南澳多端柔性直流工程线路故障隔离策略[J].南方电网技术,2018,12(2):41-46.GUO Zhu,LIU Tao,CHEN Ming,et al.Isolation strategy for line fault of Nan'ao multi-terminal VSC-HVDC project[J].Southern Power System Technology,2018,12(2):41-46.
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[19]饶宏,许树楷,周月宾,等.特高压柔性直流主回路方案研究[J].南方电网技术,2017,11(7):1-4,67.RAO Hong,XU Shukai,ZHOU Yuebin,et al.Study on UHVflexible DC main circuit scheme[J].South Power System Technology,2017,11(7):1-4,67.
[20]黄伟煌,许树楷,黄莹,等.特高压多端混合直流输电系统稳态控制策略[J].南方电网技术,2017,11(7):5-10.HUANG Weihuang,XU Shukai,HUANG Ying,et al.Steadystate control strategy of multi-terminal hybrid UHVDC[J].Southern Power System Technology,2017,11(7):5-10.
[21]熊岩,饶宏,许树楷,等.特高压多端混合直流输电系统启櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡动与故障穿越研究[J].全球能源互联网,2018,1(4):478-486.XIONG Yan,RAO Hong,XU Shukai,et al.Research on start and fault ride-through strategy for ultra-high voltage multi-terminal hybrid DC transmission system[J].Journal of Global Energy Interconnection,2018,1(4):478-486.
[22]SKYTT A K,JANSSON F,ALERMAN H,et al.Application of DC breakers and switches for the North-East Agra 800 kV HVDCmulti-terminal project[C]//CIGRE SC B4 International Colloquium on HVDC and STATCOM,September 25-26,2015,Agra,India.New York:CIGRE,2015:313-317.
[2]汤广福,庞辉,贺之渊.先进交直流输电技术在中国的发展与应用[J].中国电机工程学报,2016,36(7):1760-1771.TANG Guangfu,PANG Hui,HE Zhiyuan.R&D and application of advanced power transmission technology in China[J].Proceedings of the CSEE,2016,36(7):1760-1771.
[3]饶宏,洪潮,周保荣,等.乌东德特高压多端直流工程受端采用柔性直流对多直流集中馈入问题的改善作用研究[J].南方电网技术,2017,11(3):1-5.RAO Hong,HONG Chao,ZHOU Baorong,et al.Study on improvement of VSC-HVDC at inverter side of Wudongde multiterminal UHVDC for the problem of centralized multi-infeed HVDC[J].Southern Power System Technology,2017,11(3):1-5.
[4]装备工业司.世界首个特高压柔性直流换流阀研制成功(2017年第十三期)[EB/OL](2017-07-22)[2017-08-01].http://www.miit.gov.cn/n1146285/.n1146352/n3054355/n3057585/n3057597/c5751863/content.html.
[5]李岩,罗雨,许树楷,等.柔性直流输电技术:应用、进步与期望[J].南方电网技术,2015,9(1):7-13.LI Yan,LUO Yu,XU Shukai,et al.VSC-HVDC transmission technology:application,advancement and expectation[J].Southern Power System Technology,2015,9(1):7-13.
[6]李广凯,李庚银,梁海峰,等.新型混合直流输电方式的研究[J].电网技术,2011,35(2):82-86.LI Guangkai,LI Gengyin,LIANG Haifeng,et al.Reaserch on hybrid HVDC system[J].Power System Techmology,2011,35(2):82-86.
[7]赵成勇,郭春义,刘文静.混合直流输电[M].北京:科学出版社,2017.
[8]张文亮,汤涌,曾南超.多端高压直流输电技术及应用前景[J].电网技术,2010,34(9):1-6.ZHANG Wenliang,TANG Yong,ZENG Nanchao.Multi-terminal HVDC transmission technologies and its application prospect in China[J].Power System Technology,2010,34(9):1-6.
[9]王俊生,傅闯,胡铭,等.并联型多端直流输电系统保护相关问题探讨[J].中国电机工程学报,2014,34(28):4923-4931.WANG Junsheng,FU Chuang,HU Ming,et al.Discussion on the protection in parallel-type multi-terminal HVDC systems[J].Proceedings of the CSEE,2014,34(28):4923-4931.
[10]CHENG J,GUAN M,TANG L,et al.Paralleled multi-terminal DC transmission line fault locating method based on travelling wave[J].IET Generation,Transmission&Distribution,2014,8(12):2092-2101.
[11]PATEL M M,YADAV V K.Design and operational constraints of NEA±800 kV,6 000 MW UHVDC bipolar system[C]//2017 Innovations in Power and Advanced Computing Technologies(i-PACT),April 21-22,2017,Vellore,India.New York:IEEE,2017:1-5.
[12]NOSAKA N,TSUBOTA Y,MATSUKAWA K.Simulation studies on a control and protection scheme for hybrid multi-terminal HVDC systems[C]//IEEE Power Engineering Society1999 Winter Meeting,January 31-February 4,1999,New York,USA.New York:IEEE,1999:1079-1084.
[13]袁旭峰,程时杰,文劲宇.基于CSC和VSC的混合多端直流输电系统及其仿真[J].电力系统自动化,2006,30(20):32-36.YUAN Xufeng,CHENG Shijie,WEN Jinyu.Simulation study for a hybrid multi-terminal HVDC transmission system based on CSC and VSC[J].Power System Automation,2006,30(20):32-36.
[14]汤广福,王高勇,贺之渊,等.张北500 kV直流电网关键技术与设备研究[J].高电压技术,2018,44(7):2097-2106.TANG Guangfu,WANG Gaoyong,HE Zhiyuan,et al.Research on key technologies and equipment of Zhangbei 500 kVDC power grid[J].High Voltage Engineering,2018,44(7):2097-2106.
[15]郭铸,刘涛,陈名,等.南澳多端柔性直流工程线路故障隔离策略[J].南方电网技术,2018,12(2):41-46.GUO Zhu,LIU Tao,CHEN Ming,et al.Isolation strategy for line fault of Nan'ao multi-terminal VSC-HVDC project[J].Southern Power System Technology,2018,12(2):41-46.
[16]裘鹏,黄晓明,王一,等.高压直流断路器在舟山柔直工程中的应用[J].高电压技术,2018,44(2):403-408.QIU Peng,HUANG Xiaoming,WANG Yi,et al.Application of high voltage DC circuit breaker in Zhoushan VSC-HVDC(下转第83页Continued on Page 83)58 Continued from Page 58)transmission project[J].High Voltage Engineering,2018,44(2):403-408.
[17]ZENG R,XU L,YAO L,et al.Design and operation of a hybrid modular multilevel converter[J].IEEE Transactions on Power Electronics,2015.30(3):1137-1146.
[18]XU Jianzhong,ZHAO Chengyong,HE Zhipeng Start-up control and DC fault ride-through strategies of a hybrid MMC-HVDC system suitable for overhead line transmission[J].2015 IEEE 2nd International Future Energy Electronics Conference,November 1-4,2015,Taipei,China.New York:IEEE,2015:1-6.
[19]饶宏,许树楷,周月宾,等.特高压柔性直流主回路方案研究[J].南方电网技术,2017,11(7):1-4,67.RAO Hong,XU Shukai,ZHOU Yuebin,et al.Study on UHVflexible DC main circuit scheme[J].South Power System Technology,2017,11(7):1-4,67.
[20]黄伟煌,许树楷,黄莹,等.特高压多端混合直流输电系统稳态控制策略[J].南方电网技术,2017,11(7):5-10.HUANG Weihuang,XU Shukai,HUANG Ying,et al.Steadystate control strategy of multi-terminal hybrid UHVDC[J].Southern Power System Technology,2017,11(7):5-10.
[21]熊岩,饶宏,许树楷,等.特高压多端混合直流输电系统启櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡櫡动与故障穿越研究[J].全球能源互联网,2018,1(4):478-486.XIONG Yan,RAO Hong,XU Shukai,et al.Research on start and fault ride-through strategy for ultra-high voltage multi-terminal hybrid DC transmission system[J].Journal of Global Energy Interconnection,2018,1(4):478-486.
[22]SKYTT A K,JANSSON F,ALERMAN H,et al.Application of DC breakers and switches for the North-East Agra 800 kV HVDCmulti-terminal project[C]//CIGRE SC B4 International Colloquium on HVDC and STATCOM,September 25-26,2015,Agra,India.New York:CIGRE,2015:313-317.