中压直流配电系统故障过电压水平分析
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摘要
为解决珠海"互联网+"柔性直流配电系统的绝缘配合问题,运用PSCAD/EMTDC仿真软件搭建了三端柔性直流配电系统模型,对主换流器区域和直流线路区域的典型故障事件、保护动作后的系统关键位置过电压水平进行仿真,并通过同类故障点间的比较得到每种故障事件下的过电压最大水平。仿真结果表明,主换流器区域的桥臂电抗器阀侧接地故障、直流电抗器阀侧极间短路故障是过电压较严重的2种故障情况;直流线路区域的极间短路故障发生时,主换流器区域过电压较直流线路区域更严重;主换流器区域的联接变压器阀侧单相接地故障和直流线路区域的首端单极接地故障特性较相似。
In order to solve the problem of insulation coordination of Zhuhai internet plus flexible DC power distribution system,this paper uses PSCAD/EMTDC simulation software to build a three-terminal flexible DC power distribution system model for making simulation on overvoltage levels of key locations of the system after some typical fault events occur and protections act in the main converter area and the DC line area. Meanwhile,it obtains the maximum overvoltage level under each fault event by comparison between similar fault points. The simulation results showthat ground fault at the converter side of the bridge arm reactor and interelectrode short circuit fault at the converter side of the DC reactors in the main converter area are faults with severe overvoltage.As the interelectrode short circuit fault occurs in the DC line area,the overvoltage of the main converter area is more serious than that of the DC line area. The single-phase ground fault at the converter side of the coupling transformer in the main converter area is similar to the monopole grounding fault at the head of DC line in the DC line area.
In order to solve the problem of insulation coordination of Zhuhai internet plus flexible DC power distribution system,this paper uses PSCAD/EMTDC simulation software to build a three-terminal flexible DC power distribution system model for making simulation on overvoltage levels of key locations of the system after some typical fault events occur and protections act in the main converter area and the DC line area. Meanwhile,it obtains the maximum overvoltage level under each fault event by comparison between similar fault points. The simulation results showthat ground fault at the converter side of the bridge arm reactor and interelectrode short circuit fault at the converter side of the DC reactors in the main converter area are faults with severe overvoltage.As the interelectrode short circuit fault occurs in the DC line area,the overvoltage of the main converter area is more serious than that of the DC line area. The single-phase ground fault at the converter side of the coupling transformer in the main converter area is similar to the monopole grounding fault at the head of DC line in the DC line area.
引文
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[9]李斌,何佳伟.柔性直流配电系统故障分析及限流方法[J].中国电机工程学报,2015,35(12):3026-3036.LI Bin,HE Jiaw ei. DC fault analysis and current limiting technique for VSC-based DC distribution system[J]. Proceedings of the CSEE,2015,35(12):3026-3036.
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[11]贾轩涛,史博伦,胡锦根,等.永富直流三种功率输送方式在线转换直流过电压仿真研究[J].电力系统保护与控制,2017,45(5):131-138.JIA Xuantao,SHI Bolun,HU Jingen,et al. DC overvoltage simulation for online-sw itching of three pow er transmission modes in Yongfu HVDC project[J]. Pow er System Protection and Control,2017,45(5):131-138.
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[14]许火炬,缪希仁.交直流混合配电方式及其故障保护研究综述[J].电力系统保护与控制,2017,45(5):139-146.XU Huoju,M IAO Xiren. A review of AC/DC hybrid distribution and fault protection[J]. Pow er System Protection and Control,2017,45(5):139-146.
[15]戴志辉,葛红波,严思齐,等.柔性直流配电网故障分析[J].电工技术学报,2018,33(8):1863-1874.DAI Zhihui,GE Hongbo,YAN Siqi,et al. Fault analysis of flxible DC distribution system[J]. Transactions of China Electrotechnical Society,2018,33(8):1863-1874.
[16]罗飞,焦在滨,马钊,等.直流配电网故障分析和继电保护综述[J].供用电,2018,35(6):3-11.LUO Fei,JIAO Zaibin,M A Zhao,et al. Review of fault analysis and relay protection of DC distribution netw ork[J]. Distribution&Utilization,2018,35(6):3-11.
[17]李斌,李晔,何佳伟,等.基于模块化多电平的柔性直流系统故障稳态特性分析[J].电力系统保护与控制,2016,44(21):1-8.LI Bin,LI Ye,HE Jiaw ei,et al. Stable fault characteristic analysis of the DC system based on modular multilevel converter[J].Pow er System Protection and Control,2016,44(21):1-8.
[18]秦红霞,孙刚,时伯年,等.柔性直流配网极间故障控制保护策略与主设备参数配合研究[J].电力系统保护与控制,2016,44(21):150-156.QIN Hongxia,SUN Gang,SHI Bonian,et al. Research on control and protection strategy of M M C based DC distribution grid w ith interpoles fault[J]. Pow er System Protection and Control,2016,44(21):150-156.
[19]高一波.直流配电系统接地故障分析与接地方式研究[D].杭州:浙江大学,2015.
[20]付艳,黄金海,吴庆范,等.基于MMC多端柔性直流输电保护关键技术研究[J].电力系统保护与控制,2016,44(18):133-139.FU Yan,HUANG Jinhai,WU Qingfan,et al. Key technologies research based on multi-terminal M M C-HVDC protection[J]. Power System Protection and Control,2016,44(18):133-139.
[21]孙刚,时伯年,赵宇明,等.基于MMC的柔性直流配电网故障定位及保护配置研究[J].电力系统保护与控制,2015,43(22):127-133.SUN Gang,SHI Bonian,ZHAO Yuming,et al. Research on the fault location method and protection configuration strategy of M M C based DC distribution grid[J]. Pow er System Protection and Control,2015,43(22):127-133.
[22]邱德锋,李钢,田杰,等.柔性直流配电网动态模拟系统设计与实现[J].供用电,2016,33(8):50-56.QIU Defeng,LI Gang,TIAN Jie,et al. Design and implementation of dynamic simulation system of flexible DC system[J]. Distribution&Utilization,2016,33(8):50-56.
[23]裴旵,吕思颖,秦昕,等.特高压直流输电系统换流站故障过电压研究[J].电力系统保护与控制,2016,44(12):149-154.PEI Chan,LSiying,QIN Xin,et al. Study on fault overvoltage of converter station of UHVDC pow er transmission system[J]. Pow er System Protection and Control,2016,44(12):149-154.
[24]何秋萍,韩永霞,阮耀萱,等.±10 kV柔性直流配电系统接地方案研究[J].广东电力,2015,28(12):109-114.HE Qiuping,HAN Yongxia,RUAN Yaoxuan,et al. Research on grounding scheme for±10 kV flexible DC pow er distribution system[J]. Guangdong Electric Pow er, 2015, 28(12):109-114.
[2] LI C,CHAUDHARY S K,DRAGICEVIC T,et al. Power flow analysis for DC voltage droop controlled DC microgrids[C]//International M ulti-Conference on Systems,Signals&Devices. Barcelona:Barcelona M icroelectronics Institute,2014:1-5.
[3] KRAMER S. Predictive current controlled 5-kW single-phase bidirectional inverter w ith w ide inductance variation for DC-microgrid applications[J]. IEEE Transactions on Pow er Electronics,2010,25(12):3076-3084.
[4] HUANG A Q,CROW M L,HEYDT G T,et al. The future renew able electric energy delivery and management(FREEDM)system:the energy internet[J]. Proceedings of the IEEE,2010,99(1):133-148.
[5]刘树,赵宇明,陈莉,等.柔性直流配电网控制保护系统设计与策略研究[J].供用电,2018,35(1):21-27,39.LIU Shu,ZHAO Yuming,CHEN Li,et al. Research on control and protection strategy and design scheme of VSC-DC distribution netw ork control and protection system[J]. Distribution&Utilization,2018,35(1):21-27,39.
[6]付东,陈冰,张勇军.柔性直流配电网的连接方式与建模综述[J].广东电力,2018,31(4):1-8.FU Dong,CHEN Bing,ZHANG Yongjun. Review on connection mode and modeling of flexible DC pow er distribution netw ork[J]. Guangdong Electric Power,2018,31(4):1-8.
[7]贾祺,赵彪,严干贵,等.基于高频链直流变压器的柔性中压直流配电系统分析[J].电力系统保护与控制,2016,44(16):90-98.JIA Qi,ZHAO Biao,YAN Gangui,et al. Analysis of flexible medium voltage DC pow er distribution system based on high-frequency-link DC solid state transformer[J]. Pow er System Protection and Control,2016,44(16):90-98.
[8]胡仙来,冯亚东.直流配电网研究现状综述[J].供用电,2016,33(7):39-43.HU Xianlai,FENG Yadong. An overview of the research situation of DC distribution netw ork[J]. Distribution&Utilization,2016,33(7):39-43.
[9]李斌,何佳伟.柔性直流配电系统故障分析及限流方法[J].中国电机工程学报,2015,35(12):3026-3036.LI Bin,HE Jiaw ei. DC fault analysis and current limiting technique for VSC-based DC distribution system[J]. Proceedings of the CSEE,2015,35(12):3026-3036.
[10]郭亚勋,刘刚,江晓锋,等.海上风电场内部电气系统过电压仿真[J].广东电力,2017,30(10):23-27.GUO Yaxun,LIU Gang,JIANG Xiaofeng,et al. Simulation on overvoltage of internal electric system of offshore w ind farm[J].Guangdong Electric Pow er,2017,30(10):23-27.
[11]贾轩涛,史博伦,胡锦根,等.永富直流三种功率输送方式在线转换直流过电压仿真研究[J].电力系统保护与控制,2017,45(5):131-138.JIA Xuantao,SHI Bolun,HU Jingen,et al. DC overvoltage simulation for online-sw itching of three pow er transmission modes in Yongfu HVDC project[J]. Pow er System Protection and Control,2017,45(5):131-138.
[12]朱童,赵宇明,余占清,等.中压柔性直流配电系统故障暂态仿真研究[J].高压电器,2015(11):26-32.ZHU Tong,ZHAO Yuming,YU Zhanqing,et al. Fault transient simulation of middle-voltage M M C-HVDC distribution system[J]. High Voltage Apparatus,2015(11):26-32.
[13]李斌,何佳伟,李晔,等.多端柔性直流系统直流故障保护方案[J].中国电机工程学报,2016,36(17):4627-4636.LI Bin,HE Jiaw ei,LI Ye,et al. DC fault protection strategy for the flexible multi-terminal DC system[J]. Proceedings of the CSEE,2016,36(17):4627-4636.
[14]许火炬,缪希仁.交直流混合配电方式及其故障保护研究综述[J].电力系统保护与控制,2017,45(5):139-146.XU Huoju,M IAO Xiren. A review of AC/DC hybrid distribution and fault protection[J]. Pow er System Protection and Control,2017,45(5):139-146.
[15]戴志辉,葛红波,严思齐,等.柔性直流配电网故障分析[J].电工技术学报,2018,33(8):1863-1874.DAI Zhihui,GE Hongbo,YAN Siqi,et al. Fault analysis of flxible DC distribution system[J]. Transactions of China Electrotechnical Society,2018,33(8):1863-1874.
[16]罗飞,焦在滨,马钊,等.直流配电网故障分析和继电保护综述[J].供用电,2018,35(6):3-11.LUO Fei,JIAO Zaibin,M A Zhao,et al. Review of fault analysis and relay protection of DC distribution netw ork[J]. Distribution&Utilization,2018,35(6):3-11.
[17]李斌,李晔,何佳伟,等.基于模块化多电平的柔性直流系统故障稳态特性分析[J].电力系统保护与控制,2016,44(21):1-8.LI Bin,LI Ye,HE Jiaw ei,et al. Stable fault characteristic analysis of the DC system based on modular multilevel converter[J].Pow er System Protection and Control,2016,44(21):1-8.
[18]秦红霞,孙刚,时伯年,等.柔性直流配网极间故障控制保护策略与主设备参数配合研究[J].电力系统保护与控制,2016,44(21):150-156.QIN Hongxia,SUN Gang,SHI Bonian,et al. Research on control and protection strategy of M M C based DC distribution grid w ith interpoles fault[J]. Pow er System Protection and Control,2016,44(21):150-156.
[19]高一波.直流配电系统接地故障分析与接地方式研究[D].杭州:浙江大学,2015.
[20]付艳,黄金海,吴庆范,等.基于MMC多端柔性直流输电保护关键技术研究[J].电力系统保护与控制,2016,44(18):133-139.FU Yan,HUANG Jinhai,WU Qingfan,et al. Key technologies research based on multi-terminal M M C-HVDC protection[J]. Power System Protection and Control,2016,44(18):133-139.
[21]孙刚,时伯年,赵宇明,等.基于MMC的柔性直流配电网故障定位及保护配置研究[J].电力系统保护与控制,2015,43(22):127-133.SUN Gang,SHI Bonian,ZHAO Yuming,et al. Research on the fault location method and protection configuration strategy of M M C based DC distribution grid[J]. Pow er System Protection and Control,2015,43(22):127-133.
[22]邱德锋,李钢,田杰,等.柔性直流配电网动态模拟系统设计与实现[J].供用电,2016,33(8):50-56.QIU Defeng,LI Gang,TIAN Jie,et al. Design and implementation of dynamic simulation system of flexible DC system[J]. Distribution&Utilization,2016,33(8):50-56.
[23]裴旵,吕思颖,秦昕,等.特高压直流输电系统换流站故障过电压研究[J].电力系统保护与控制,2016,44(12):149-154.PEI Chan,LSiying,QIN Xin,et al. Study on fault overvoltage of converter station of UHVDC pow er transmission system[J]. Pow er System Protection and Control,2016,44(12):149-154.
[24]何秋萍,韩永霞,阮耀萱,等.±10 kV柔性直流配电系统接地方案研究[J].广东电力,2015,28(12):109-114.HE Qiuping,HAN Yongxia,RUAN Yaoxuan,et al. Research on grounding scheme for±10 kV flexible DC pow er distribution system[J]. Guangdong Electric Pow er, 2015, 28(12):109-114.