混合直流输电系统过电压抑制方法研究
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摘要
混合直流输电系统中逆变站采用电压源换流器,彻底解决了换相失败问题,未来在多馈入直流输电地区发展前景非常好。过电压水平对系统的安全稳定和工程可行性非常关键,因此对于LCC-MMC混合直流输电系统过电压水平的抑制策略研究十分有必要。文中首先研究了LCC-D-MMC混合直流输电系统的运行原理,进一步研究了过电压发生的机理;然后分析了LCC-MMC混合直流输电系统过电压影响因素,在此基础上提出了混合直流输电系统过电压抑制策略;最后在PSCAD/EMTDC软件中建立了LCC-MMC混合直流输电过电压仿真模型,对LCC-MMC过电压抑制策略进行了仿真验证。通过研究可知,MMC闭锁后存在的充电回路为混合直流输电系统过电压的主要因素,采用LCC电流指令快速响应策略可以有效的抑制系统过电压水平。
In hybrid-HVDC transmission system,voltage source converter is used in inverter station,by this thecommutation failure would be avoided,it would be used widely for multi-infeed direct current system transmissionsystem in future. Overvoltage is very critical for power transmission stability and engineering feasibility of hybrid-HVDC transmission system. It is necessary and significant to research overvoltage control strategy on hybrid-HVDCtransmission system. Firstly,the operation and overvoltage mechanism of hybrid-HVDC transmission system are ana-lyzed in this paper. Above this,overvoltage impact factors of hybrid-HVDC transmission system are comprehensivelyanalyzed. Based on this,the overvoltage control strategy would is proposed in detail. Finally,LCC-MMC hybrid-HVDC transmission system and model are built by PSCAD/EMTDC,and the overvoltage control strategy is simulat-ed. According to the analysis and result,the main factor of HVDC transmission system overvoltage is the chargingcircuit of sub-module,after MMC blocking. In addition,the overvoltage level of hybrid-HVDC transmission systemcould be suppressed effectively by LCC current order fast response strategy.
In hybrid-HVDC transmission system,voltage source converter is used in inverter station,by this thecommutation failure would be avoided,it would be used widely for multi-infeed direct current system transmissionsystem in future. Overvoltage is very critical for power transmission stability and engineering feasibility of hybrid-HVDC transmission system. It is necessary and significant to research overvoltage control strategy on hybrid-HVDCtransmission system. Firstly,the operation and overvoltage mechanism of hybrid-HVDC transmission system are ana-lyzed in this paper. Above this,overvoltage impact factors of hybrid-HVDC transmission system are comprehensivelyanalyzed. Based on this,the overvoltage control strategy would is proposed in detail. Finally,LCC-MMC hybrid-HVDC transmission system and model are built by PSCAD/EMTDC,and the overvoltage control strategy is simulat-ed. According to the analysis and result,the main factor of HVDC transmission system overvoltage is the chargingcircuit of sub-module,after MMC blocking. In addition,the overvoltage level of hybrid-HVDC transmission systemcould be suppressed effectively by LCC current order fast response strategy.
引文
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[5] RAHIMI E,GOLE A M,DAVIES J B. Commutation failure analysis in multi-infeed HVDC systems[J]. IEEE Transactions on Power Delivery,2011,26(1):378-384.
[6]吴萍,林伟芳,孙华东,等.多馈入直流输电系统换相失败机制及特性[J].电网技术,2012,36(5):269-274.WU Ping,LIN Weifang,SUN Huadong,et al. Research and electromechanical transient simulation on mechanism of commutation failure in multi-infeed HVDC power transmission system[J]. Power System Technology,2012,36(5):269-274.
[7]王永平,赵文强,杨建明,等.混合直流输电技术及发展分析[J].电力系统自动化,2017,41(7):156-167.WANG Yongping,ZHAO Wenqiang,YANG Jianming,et al. Hybrid high-voltage direct current transmission technology and its development analysis[J]. Automation of Electric Power Systems,2017,41(7):156-167.
[8]唐庚,徐政,薛英林,等. LCC-MMC混合高压直流输电系统[J].电工技术学报,2013,28(10):301-310.TANG Geng,XU Zheng,XUE Yinglin,et al. A LCC-MMC hybrid HVDC transmission system[J]. Transactions of China Electrotechnical Society,2013,28(10):301-310.
[9]张哲任,徐政,薛英林,等. LCC-MMC混合直流输电系统直流侧谐波电流计算[J].电力系统自动化,2014,38(23):65-70.ZHANG Zheren,XU Zheng,XUE Yinglin,et al. Calculation of DC side harmonic currents for LCC-MMC hybrid HVDC transmission system[J]. Automation of Electric Power Systems,2014,38(23):65-70.
[10]卢向东,赵成勇.基于VSC-HVDC的线路过电压抑制策略研究[J].高电压技术,2008,34(3):462-467.LU Xiangdong,ZHAO Chengyong. Study of control strategies of suppressing overvoltage on overhead lines by VSCHVDC[J]. High Voltage Engineering,2008,34(3):462-467.
[11]徐政,王世佳,李宁璨,等.用于远距离大容量架空线路的LCC-MMC串联混合型直流输电系统[J].电网技术,2016,40(1):55-63.XU Zheng,WANG Shijia,LI Ningcan,et al. A LCC and MMC series hybrid HVDC topology suitable for bulk power overhead line transmission[J]. Power System Technology,2016,40(1):55-63.
[12] AJAEI F B,IRAVANI R. Cable surge arrester operation due to transient over voltages under DC-side faults in the MMC-HVDC link[J]. IEEE Transactions on Power Delivery,2016,31(3):1213-1222.
[13]阎发友,汤广福,贺之渊,等.基于MMC的多端柔性直流输电系统改进下垂控制策略[J].中国电机工程学报,2014,34(3):397-405.YAN Fayou,TANG Guangfu,HE Zhiyuan,et al. An improved droop control strategy for MMC-based VSC-MTDC systems[J]. Proceedings of the CSEE,2014,34(3):397-405.
[14] BAUMAN J,KAZERANI M. Commutation failure reduction in HVDC systems using adaptive fuzzy logic controller[J].IEEE Transactions on Power Systems,2007,22(4):1995-2002.
[15]薛英林,徐政,潘武略,等.电流源型混合直流输电系统建模与仿真[J].电力系统自动化,2012,36(9):98-103.XUE Yinglin,XU Zheng,PAN Wulue,et al. Modeling and simulation for a hybrid current source converter high voltage direct current transmission system[J]. Automation of Electric Power Systems,2012,36(9):98-103.
[16] LEE H A,ANDERSON G. Power stability analysis of multiinfeed HVDC systems[J]. IEEE Transactions on Power Delivery,1998,13(3):923-931.
[17]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,2006,30(4):82-86.LI Guangkai,LI Gengyin,LIANG Haifeng,et al. Research on a novel in hybrid-HVDC system[J]. Power System Technology,2006,30(4):82-86.
[18]郭春义,刘文静,赵成勇,等.混合直流输电系统的参数优化方法[J].电力系统自动化,2015,39(11):96-102.GUO Chunyi,LIU Wenjing,ZHAO Chengyong,et al. Parameters optimization method of hybrid HVDC transmission system[J]. Automation of Electric Power Systems,2015,39(11):96-102.
[19]倪晓军,赵成勇,刘羽超,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,LIU Yuchao,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.
[20]余瑜,刘开培,陈灏泽,等.伪双极VSC-LCC型混合直流输电系统启动方法[J].高电压技术,2014,40(8):2572-2578.YU Yu,LIU Kaipei,CHEN Haoze,et al. Startup procedure for VSC-LCC based hybrid pseudo bipolar HVDC system[J]. High Voltage Engineering,2014,40(8):2572-2578.
[21] ZHAO C,XU J,LI T. DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J]. Science China(Technological Sciences),2013,56(1):253-261.
[22]郭春义,赵成勇,王晶.新型双馈入直流输电系统供电无源网络的运行特性研究[J].电工技术学报,2012,27(11):211-218.GUO Chunyi,ZHAO Chengyong,WANG Jing. Operation characteristic research on novel double-infeed HVDC system supplying passive network[J]. Transactions of China Electrotechnical Society,2012,27(11):211-218.
[23] KOURO S,BERNAL R,MIRANDA H,et al. High-performance torque and flux control for multilevel inverter fed induction motors[J]. IEEE Transactions on Power Electronics,2007,22(6):2116-2123.
[24] TU Q R,XU Z,XU L. Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters[J]. IEEE Transactions on Power Delivery,2011,26(3):2009-2017.
[2]王峰,刘天琪,周胜军,等.谐波对HVDC系统换相失败的影响机理及定量分析方法[J].中国电机工程学报,2014,35(19):4888-4894.WANG Feng,LIU Tianqi,ZHOU Shengjun,et al. Mechanism and quantitative analysis method for HVDC commutation failure resulting from harmonics[J]. Proceedings of the CSEE,2014,35(19):4888-4894.
[3]刘羽超,郭春义,许韦华,等.一种降低直流输电换相失败概率的控制方法[J].电网技术,2015,39(1):76-82.LIU Yuchao,GUO Chunyi,XU Weihua,et al. A control method to reduce commutation failure probability in HVDC power transmission[J]. Power System Technology,2015,39(1):76-82.
[4] WEI Z N,YUAN Y,LEI X,et al. Direct-current predictive control strategy for inhibiting commutation failure in HVDC converter[J]. IEEE Transactions on Power Systems,2014,29(5):2409-2417.
[5] RAHIMI E,GOLE A M,DAVIES J B. Commutation failure analysis in multi-infeed HVDC systems[J]. IEEE Transactions on Power Delivery,2011,26(1):378-384.
[6]吴萍,林伟芳,孙华东,等.多馈入直流输电系统换相失败机制及特性[J].电网技术,2012,36(5):269-274.WU Ping,LIN Weifang,SUN Huadong,et al. Research and electromechanical transient simulation on mechanism of commutation failure in multi-infeed HVDC power transmission system[J]. Power System Technology,2012,36(5):269-274.
[7]王永平,赵文强,杨建明,等.混合直流输电技术及发展分析[J].电力系统自动化,2017,41(7):156-167.WANG Yongping,ZHAO Wenqiang,YANG Jianming,et al. Hybrid high-voltage direct current transmission technology and its development analysis[J]. Automation of Electric Power Systems,2017,41(7):156-167.
[8]唐庚,徐政,薛英林,等. LCC-MMC混合高压直流输电系统[J].电工技术学报,2013,28(10):301-310.TANG Geng,XU Zheng,XUE Yinglin,et al. A LCC-MMC hybrid HVDC transmission system[J]. Transactions of China Electrotechnical Society,2013,28(10):301-310.
[9]张哲任,徐政,薛英林,等. LCC-MMC混合直流输电系统直流侧谐波电流计算[J].电力系统自动化,2014,38(23):65-70.ZHANG Zheren,XU Zheng,XUE Yinglin,et al. Calculation of DC side harmonic currents for LCC-MMC hybrid HVDC transmission system[J]. Automation of Electric Power Systems,2014,38(23):65-70.
[10]卢向东,赵成勇.基于VSC-HVDC的线路过电压抑制策略研究[J].高电压技术,2008,34(3):462-467.LU Xiangdong,ZHAO Chengyong. Study of control strategies of suppressing overvoltage on overhead lines by VSCHVDC[J]. High Voltage Engineering,2008,34(3):462-467.
[11]徐政,王世佳,李宁璨,等.用于远距离大容量架空线路的LCC-MMC串联混合型直流输电系统[J].电网技术,2016,40(1):55-63.XU Zheng,WANG Shijia,LI Ningcan,et al. A LCC and MMC series hybrid HVDC topology suitable for bulk power overhead line transmission[J]. Power System Technology,2016,40(1):55-63.
[12] AJAEI F B,IRAVANI R. Cable surge arrester operation due to transient over voltages under DC-side faults in the MMC-HVDC link[J]. IEEE Transactions on Power Delivery,2016,31(3):1213-1222.
[13]阎发友,汤广福,贺之渊,等.基于MMC的多端柔性直流输电系统改进下垂控制策略[J].中国电机工程学报,2014,34(3):397-405.YAN Fayou,TANG Guangfu,HE Zhiyuan,et al. An improved droop control strategy for MMC-based VSC-MTDC systems[J]. Proceedings of the CSEE,2014,34(3):397-405.
[14] BAUMAN J,KAZERANI M. Commutation failure reduction in HVDC systems using adaptive fuzzy logic controller[J].IEEE Transactions on Power Systems,2007,22(4):1995-2002.
[15]薛英林,徐政,潘武略,等.电流源型混合直流输电系统建模与仿真[J].电力系统自动化,2012,36(9):98-103.XUE Yinglin,XU Zheng,PAN Wulue,et al. Modeling and simulation for a hybrid current source converter high voltage direct current transmission system[J]. Automation of Electric Power Systems,2012,36(9):98-103.
[16] LEE H A,ANDERSON G. Power stability analysis of multiinfeed HVDC systems[J]. IEEE Transactions on Power Delivery,1998,13(3):923-931.
[17]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,2006,30(4):82-86.LI Guangkai,LI Gengyin,LIANG Haifeng,et al. Research on a novel in hybrid-HVDC system[J]. Power System Technology,2006,30(4):82-86.
[18]郭春义,刘文静,赵成勇,等.混合直流输电系统的参数优化方法[J].电力系统自动化,2015,39(11):96-102.GUO Chunyi,LIU Wenjing,ZHAO Chengyong,et al. Parameters optimization method of hybrid HVDC transmission system[J]. Automation of Electric Power Systems,2015,39(11):96-102.
[19]倪晓军,赵成勇,刘羽超,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,LIU Yuchao,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.
[20]余瑜,刘开培,陈灏泽,等.伪双极VSC-LCC型混合直流输电系统启动方法[J].高电压技术,2014,40(8):2572-2578.YU Yu,LIU Kaipei,CHEN Haoze,et al. Startup procedure for VSC-LCC based hybrid pseudo bipolar HVDC system[J]. High Voltage Engineering,2014,40(8):2572-2578.
[21] ZHAO C,XU J,LI T. DC faults ride-through capability analysis of full-bridge MMC-MTDC system[J]. Science China(Technological Sciences),2013,56(1):253-261.
[22]郭春义,赵成勇,王晶.新型双馈入直流输电系统供电无源网络的运行特性研究[J].电工技术学报,2012,27(11):211-218.GUO Chunyi,ZHAO Chengyong,WANG Jing. Operation characteristic research on novel double-infeed HVDC system supplying passive network[J]. Transactions of China Electrotechnical Society,2012,27(11):211-218.
[23] KOURO S,BERNAL R,MIRANDA H,et al. High-performance torque and flux control for multilevel inverter fed induction motors[J]. IEEE Transactions on Power Electronics,2007,22(6):2116-2123.
[24] TU Q R,XU Z,XU L. Reduced switching-frequency modulation and circulating current suppression for modular multilevel converters[J]. IEEE Transactions on Power Delivery,2011,26(3):2009-2017.