混合双馈入系统中VSC-HVDC对LCC-HVDC受端电网强度的影响
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摘要
在含有LCC-HVDC和VSC-HVDC的混合双馈入系统中,LCC-HVDC受端电网电压支撑能力是影响系统稳定性的重要因素。为对电压支撑能力进行准确评估,该文借鉴单馈入LCC-HVDC系统中有效短路比和临界有效短路比的概念和计算方法,将混合双馈入系统等效为单馈入LCCHVDC系统,分析等效原则以及等效单馈入系统的参数计算方法,并提出混合双馈入系统中等效有效短路比和临界等效有效短路比的定义。机理分析和PSCAD仿真结果表明,所提指标能够准确地反应VSC-HVDC对LCC-HVDC受端电网强度的影响。
The voltage support capability of the LCCHVDC receiving power grid is an important factor affecting the stability of the system in hybrid dual-infeed system containing LCC-HVDC and VSC-HVDC. To evaluate the voltage support capability accurately, this paper referenced the concept and calculation method of the effective short circuit ratio and the critical effective short circuit ratio in a single-infeed LCCHVDC system, equivalent the hybrid dual-infeed system to a single-infeed LCC-HVDC system, analyzed the equivalence principle and the parameter calculation method of the equivalent single-infeed system, and then proposed the definition of equivalent effective short-circuit ratio and critical equivalent effective short-circuit ratio in a hybrid dual-infeed system. The mechanism analysis and PSCAD simulation results show the proposed indicator can reflect the effect of VSC-HVDC on the strength of the LCC-HVDC receiving power grid accurately.
The voltage support capability of the LCCHVDC receiving power grid is an important factor affecting the stability of the system in hybrid dual-infeed system containing LCC-HVDC and VSC-HVDC. To evaluate the voltage support capability accurately, this paper referenced the concept and calculation method of the effective short circuit ratio and the critical effective short circuit ratio in a single-infeed LCCHVDC system, equivalent the hybrid dual-infeed system to a single-infeed LCC-HVDC system, analyzed the equivalence principle and the parameter calculation method of the equivalent single-infeed system, and then proposed the definition of equivalent effective short-circuit ratio and critical equivalent effective short-circuit ratio in a hybrid dual-infeed system. The mechanism analysis and PSCAD simulation results show the proposed indicator can reflect the effect of VSC-HVDC on the strength of the LCC-HVDC receiving power grid accurately.
引文
[1]赵畹君.高压直流输电工程技术[M].2版.北京:中国电力出版社,2011.Zhao Wanjun.HVDC technology[M].2nd ed.Beijing:China Electric Power Press,2011(in Chinese).
[2]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004.Xu Zheng.Analysis of dynamic behavior of AC and DCtransmission system[M].Beijing:Machinery Industry Press,2004(in Chinese).
[3]汤广福.基于电压源换流器的高压直流输电技术[M].北京:中国电力出版社,2010:21-24.Tang Guangfu.Voltage resource converter based high voltage direct current transmission technology[M].Beijing:China Electric Power Press,2010:21-24(in Chinese).
[4]刘涛,李婧靓,李明,等.南方电网鲁西背靠背直流异步联网工程控制保护系统设计方案[J].南方电网技术,2014,8(6):18-22.Liu Tao,Li Jingjing,Li Ming,et al.Control and protection system design of Luxi back-to-back asynchronous interconnection HVDC project of China southern power grid[J].Southern Power System Technology,2014,8(6):18-22(in Chinese).
[5]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 multi-terminal UHVDC for the problem of centralized multi-infeed HVDC[J].Southern Power System Technology,2017,11(3):1-5(in Chinese).
[6]徐政,黄弘扬,周煜智.描述交直流并列系统电网结构品质的3种宏观指标[J].中国电机工程学报,2013,33(4):1-7.Xu Zheng,Huang Hongyang,Zhou Yuzhi.Three macroscopic indexes for describing the quality of AC/DChybrid power grid structures[J].Proceedings of the CSEE,2013,33(4):1-7(in Chinese).
[7]IEEE Standard 1204-1997.IEEE guide for planning DClinks terminating at AC locations having low short-circuit capacities[S].New York:IEEE,1997.
[8]赵成勇,孙营,李广凯.双馈入直流输电系统中VSC-HVDC的控制策略[J].中国电机工程学报,2008,28(7):97-103.Zhao Chengyong,Sun Ying,Li Guangkai.Control strategy of VSC-HVDC in dual-infeed HVDC systems[J].Proceedings of the CSEE,2008,28(7):97-103(in Chinese).
[9]Liu Yan,Chen Zhe.A flexible power control method of VSC-HVDC link for the enhancement of effective short-circuit ratio in a hybrid multi-infeed HVDC system[J].IEEE Transactions on Power Systems,2013,28(2):1568-1581.
[10]Shilpa G,Manohar P.Hybrid HVDC system for multi-infeed applications[C]//2013 International Conference on Emerging Trends in Communication,Control,Signal Processing&Computing Applications(C2SPCA).Bangalore,India:IEEE,2013:1-5.
[11]林卫星,文劲宇,王少荣,等.一种适用于风电直接经直流大规模外送的换流器[J].中国电机工程学报,2014,34(13):2022-2030.Lin Weixing,Wen Jinyu,Wang Shaorong,et al.A kind of converters suitable for large-scale integration of wind power directly through HVDC[J].Proceedings of the CSEE,2014,34(13):2022-2030(in Chinese).
[12]Liu Yan,Chen Zhe.Short Circuit Ratio analysis of multi-infeed HVDC system with a VSC-HVDClink[C]//Proceedings of the 37th Annual Conference on IEEE Industrial Electronics Society.Melbourne,VIC:IEEE,2011:949-954.
[13]Guo Chunyi,Zhang Yi,Gole A M,et al.Analysis of dual-Infeed HVDC with LCC-HVDC and VSC-HVDC[J].IEEE Transactions on Power Delivery,2012,27(3):1529-1537.
[14]郭春义,倪晓军,赵成勇.混合多馈入直流输电系统相互作用关系的定量评估方法[J].中国电机工程学报,2016,36(7):1772-1780.Guo Chunyi,Ni Xiaojun,Zhao Chengyong.A quantitative evaluation method on interaction analysis of hybrid multi-infeed HVDC system[J].Proceedings of the CSEE,2016,36(7):1772-1780(in Chinese).
[15]倪晓军,赵成勇,郭春义,等.混合双馈入直流系统中VSC-HVDC对LCC-HVDC受端系统强度的影响[J].中国电机工程学报,2015,35(16):4052-4061.Ni Xiaojun,Zhao Chengyong,Guo Chunyi,et al.The effects of VSC-HVDC on the system strength of LCC-HVDC in dual-infeed hybrid HVDC system[J].Proceedings of the CSEE,2015,35(16):4052-4061(in Chinese).
[16]Ni Xiaojun,Gole A M,Zhao Chengyong,et al.An improved measure of AC system strength for performance analysis of multi-infeed HVdc Systems including VSCand LCC converters[J].IEEE Transactions on Power Delivery,2018,33(1):169-178.
[17]Aik D L H,Andersson G.Impact of renewable energy sources on steady-state stability of weak AC/DC systems[J].CSEE Journal of Power&Energy Systems,2017,3(4):419-430.
[18]徐政.联于弱交流系统的直流输电特性研究之一--直流输电的输送能力[J].电网技术,1997,21(1):12-16.Xu Zheng.Characteristics of HVDC connected to weak AC systems Part 1:HVDC transmission capability[J].Power System Technology,1997,21(1):12-16(in Chinese).
[19]管霖,陈兴旺,雷晟,等.多馈入短路比指标的适用范围及其与直流最大传输功率的关系探讨[J].电网技术,2017,41(3):691-697.Guan Lin,Chen Xingwang,Lei Sheng,et al.Study on applicability of multi-infeed short circuit ratio and its relationship with maximum HVDC available power[J].Power System Technology,2017,41(3):691-697(in Chinese).
[20]肖浩,李银红,段献忠,等.计及LCC-HVDC交直流系统静态电压稳定的综合短路比强度指标[J].中国电机工程学报,2017,37(14):4008-4017.Xiao Hao,Li Yinhong,Duan Xianzhong,et al.Integrated short circuit ratio strength index based on the static voltage stability of the LCC-HVDC systems[J].Proceedings of the CSEE,2017,37(14):4008-4017(in Chinese).
[2]徐政.交直流电力系统动态行为分析[M].北京:机械工业出版社,2004.Xu Zheng.Analysis of dynamic behavior of AC and DCtransmission system[M].Beijing:Machinery Industry Press,2004(in Chinese).
[3]汤广福.基于电压源换流器的高压直流输电技术[M].北京:中国电力出版社,2010:21-24.Tang Guangfu.Voltage resource converter based high voltage direct current transmission technology[M].Beijing:China Electric Power Press,2010:21-24(in Chinese).
[4]刘涛,李婧靓,李明,等.南方电网鲁西背靠背直流异步联网工程控制保护系统设计方案[J].南方电网技术,2014,8(6):18-22.Liu Tao,Li Jingjing,Li Ming,et al.Control and protection system design of Luxi back-to-back asynchronous interconnection HVDC project of China southern power grid[J].Southern Power System Technology,2014,8(6):18-22(in Chinese).
[5]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 multi-terminal UHVDC for the problem of centralized multi-infeed HVDC[J].Southern Power System Technology,2017,11(3):1-5(in Chinese).
[6]徐政,黄弘扬,周煜智.描述交直流并列系统电网结构品质的3种宏观指标[J].中国电机工程学报,2013,33(4):1-7.Xu Zheng,Huang Hongyang,Zhou Yuzhi.Three macroscopic indexes for describing the quality of AC/DChybrid power grid structures[J].Proceedings of the CSEE,2013,33(4):1-7(in Chinese).
[7]IEEE Standard 1204-1997.IEEE guide for planning DClinks terminating at AC locations having low short-circuit capacities[S].New York:IEEE,1997.
[8]赵成勇,孙营,李广凯.双馈入直流输电系统中VSC-HVDC的控制策略[J].中国电机工程学报,2008,28(7):97-103.Zhao Chengyong,Sun Ying,Li Guangkai.Control strategy of VSC-HVDC in dual-infeed HVDC systems[J].Proceedings of the CSEE,2008,28(7):97-103(in Chinese).
[9]Liu Yan,Chen Zhe.A flexible power control method of VSC-HVDC link for the enhancement of effective short-circuit ratio in a hybrid multi-infeed HVDC system[J].IEEE Transactions on Power Systems,2013,28(2):1568-1581.
[10]Shilpa G,Manohar P.Hybrid HVDC system for multi-infeed applications[C]//2013 International Conference on Emerging Trends in Communication,Control,Signal Processing&Computing Applications(C2SPCA).Bangalore,India:IEEE,2013:1-5.
[11]林卫星,文劲宇,王少荣,等.一种适用于风电直接经直流大规模外送的换流器[J].中国电机工程学报,2014,34(13):2022-2030.Lin Weixing,Wen Jinyu,Wang Shaorong,et al.A kind of converters suitable for large-scale integration of wind power directly through HVDC[J].Proceedings of the CSEE,2014,34(13):2022-2030(in Chinese).
[12]Liu Yan,Chen Zhe.Short Circuit Ratio analysis of multi-infeed HVDC system with a VSC-HVDClink[C]//Proceedings of the 37th Annual Conference on IEEE Industrial Electronics Society.Melbourne,VIC:IEEE,2011:949-954.
[13]Guo Chunyi,Zhang Yi,Gole A M,et al.Analysis of dual-Infeed HVDC with LCC-HVDC and VSC-HVDC[J].IEEE Transactions on Power Delivery,2012,27(3):1529-1537.
[14]郭春义,倪晓军,赵成勇.混合多馈入直流输电系统相互作用关系的定量评估方法[J].中国电机工程学报,2016,36(7):1772-1780.Guo Chunyi,Ni Xiaojun,Zhao Chengyong.A quantitative evaluation method on interaction analysis of hybrid multi-infeed HVDC system[J].Proceedings of the CSEE,2016,36(7):1772-1780(in Chinese).
[15]倪晓军,赵成勇,郭春义,等.混合双馈入直流系统中VSC-HVDC对LCC-HVDC受端系统强度的影响[J].中国电机工程学报,2015,35(16):4052-4061.Ni Xiaojun,Zhao Chengyong,Guo Chunyi,et al.The effects of VSC-HVDC on the system strength of LCC-HVDC in dual-infeed hybrid HVDC system[J].Proceedings of the CSEE,2015,35(16):4052-4061(in Chinese).
[16]Ni Xiaojun,Gole A M,Zhao Chengyong,et al.An improved measure of AC system strength for performance analysis of multi-infeed HVdc Systems including VSCand LCC converters[J].IEEE Transactions on Power Delivery,2018,33(1):169-178.
[17]Aik D L H,Andersson G.Impact of renewable energy sources on steady-state stability of weak AC/DC systems[J].CSEE Journal of Power&Energy Systems,2017,3(4):419-430.
[18]徐政.联于弱交流系统的直流输电特性研究之一--直流输电的输送能力[J].电网技术,1997,21(1):12-16.Xu Zheng.Characteristics of HVDC connected to weak AC systems Part 1:HVDC transmission capability[J].Power System Technology,1997,21(1):12-16(in Chinese).
[19]管霖,陈兴旺,雷晟,等.多馈入短路比指标的适用范围及其与直流最大传输功率的关系探讨[J].电网技术,2017,41(3):691-697.Guan Lin,Chen Xingwang,Lei Sheng,et al.Study on applicability of multi-infeed short circuit ratio and its relationship with maximum HVDC available power[J].Power System Technology,2017,41(3):691-697(in Chinese).
[20]肖浩,李银红,段献忠,等.计及LCC-HVDC交直流系统静态电压稳定的综合短路比强度指标[J].中国电机工程学报,2017,37(14):4008-4017.Xiao Hao,Li Yinhong,Duan Xianzhong,et al.Integrated short circuit ratio strength index based on the static voltage stability of the LCC-HVDC systems[J].Proceedings of the CSEE,2017,37(14):4008-4017(in Chinese).