基于采样值相关度的广域后备保护算法
|
摘要
为解决传统后备保护整定配合复杂,发生CT断线时无法识别故障等问题,提出了一种基于采样值相关度的广域后备保护算法。该算法充分利用电网的电压、电流信息,以关联IED的采样值相关度构成保护判据。发生CT断线时,通过关联矩阵进行关联IED搜索,根据关联IED的相关度和虚拟CT的相关度大小关系区分线路故障和母线故障。该算法对采样同步精度要求低,发生CT断线时依然能正确识别并切除故障元件。最后基于PSCAD搭建IEEE 3机9节点系统进行仿真验证,结果表明:该算法能准确识别线路和母线上的各种类型故障,具有良好的动作性能。
In order to solve the problems of setting and coordination of the traditional back-up protection and its malfunction when CT breaks,a wide area back-up protection algorithm based on the correlation of sample value is proposed. The algorithm makes full use of the voltage and current information of the power grid,and the protection criterion is constituted based on the correlation of the sample value of the associated IEDs. Associated IEDs is searched through the associated matrix when CT breaks. The fault element is identified according to the correlation of the associated IEDs and the correlation of the virtual CT. This algorithm is still effective when synch precision is low and CT breaks. Finally,an IEEE 3-machine and 9-bus system is constructed by PSCAD simulation verification,the results of the correlation degree of sample value show that the proposed algorithm can identify various types of faults on line and bus,and has good operational performance.
In order to solve the problems of setting and coordination of the traditional back-up protection and its malfunction when CT breaks,a wide area back-up protection algorithm based on the correlation of sample value is proposed. The algorithm makes full use of the voltage and current information of the power grid,and the protection criterion is constituted based on the correlation of the sample value of the associated IEDs. Associated IEDs is searched through the associated matrix when CT breaks. The fault element is identified according to the correlation of the associated IEDs and the correlation of the virtual CT. This algorithm is still effective when synch precision is low and CT breaks. Finally,an IEEE 3-machine and 9-bus system is constructed by PSCAD simulation verification,the results of the correlation degree of sample value show that the proposed algorithm can identify various types of faults on line and bus,and has good operational performance.
引文
[1]薛禹胜,雷兴,薛峰,等.关于电力系统广域保护的评述[J].高电压技术,2012,38(3):513-520.Xue Yusheng,Lei Xing,Xue Feng,et al.Review on Wide Area Prtection of Electric Power Systems[J].High Voltage Engineering,2012,38(3):513-520.
[2]毛安家,张戈力,吕跃春,等.2011年9月8日美墨大停电事故的分析及其对我国电力调度运行管理的启示[J].电网技术,2012,36(4):74-78.Mao Anjia,Zhang Geli,LüYaochun,et al.Analysis on Large-Scale Blackout Occurred in South America and North Mexico Interconnected Power Grid on Sept.8,2011 and Lessons for Electric Power Dispatching in China[J].Power System Technology,2012,36(4):74-78.
[3]汤涌,卜广全,易俊.印度“7.30”、“7.31”大停电事故分析及启示[J].中国电机工程学报,2012,32(25):167-174,23.Tang Yong,Bu Guangquan,Yu Jun.Analysis and Lessons of the Blackout in Indian Power Grid on July 30 and 31,2012[J].Proceedings of the CSEE,2012,32(25):167-174,23.
[4]高翔,庄侃沁,孙勇.西欧电网“11.4”大停电事故的启示[J].电网技术,2007,31(1):25-31.Gao Xiang,Zhuang Kanqin,Sun Yong.Lessons and Enlightenment from Blackout Occurred in UCTE Grid on November4,2006[J].Power System Technology,2007,31(1):25-31.
[5]丁伟,何奔腾,王慧芳,等.广域继电保护系统研究综述[J].电力系统保护与控制,2012,40(1):145-155.Ding Wei,He Benteng,Wang Huifang,et al.Overview of wide-area relaying protection system[J].Power System Protection and Control,2012,40(1):145-155.
[6]王睿,王晓茹,黄飞,等.基于相关矩阵的电网广域后备保护算法[J].电力系统自动化,2013,37(4):69-74.Wang Rui,Wang Xiaoru,Huang Fei,etal.Wide Area Backup Protection Algorithm for Power Grid Based on Correlation Matrix[J].Automation of Electric Power Systems,2013,37(4):69-74.
[7]金恩淑,汪有成,陈喜峰.基于分区域广域继电保护系统的故障识别算法[J].电力系统保护与控制,2014,42(9):68-73.Jin Enshu,Wang Youcheng,Chen Xi.Fault identification algorithm based on zone-division wide area protection system[J].Power System Protection and Control,2014,42(9):68-73.
[8]杨增力,石东源,段献忠.基于方向比较原理的广域继电保护系统[J].中国电机工程学报,2008,28(22):87-93.Yang Zengli,Shi Dongyuan,Duan Xianzhong.Wide-area Protection System Based on Direction Comparison Principle[J].Proceedings of the CSEE,2008,28(22):87-93.
[9]李振兴,尹项根,张哲,等.基于综合阻抗比较原理的广域继电保护算法[J].电工技术学报,2012,27(8):179-186.Li Zhen Xing,Yun Xianggen,Zhang Zhe,et al.A Study of Wide-Area Protection Algorithm Based on Integrated Impedance Comparison[J].Transactions of China Electrotechnical Society,2012,27(8):179-186.
[10]马静,李金龙,叶东华,等.基于故障匹配度的广域后备保护新原理[J].电力系统自动化,2010,34(20):55-59.Ma Jing,Li Jinlong,Ye Donghua,et al.A Novel Wide-area Back-up Protection Principle Based on Fault Matching Degree[J].Automation of Electric Power Systems,2010,34(20):55-59.
[11]李振兴,尹项根,张哲,等.基于序电流相位比较和幅值比较的广域后备保护方法[J].电工技术学报,2013,28(1):242-250.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Algorithm of WideArea Protection on Comparison of Current Phase and Amplitude[J].Transactions of China Electrotechnical Society,2013,28(1):242-250.
[12]周泽昕,王兴国,杜丁香,等.一种基于电流差动原理的变电站后备保护[J].电网技术,2013,37(4):1113-1120.Zhou Zexin,Wang Xingguo,Du Dingxiang,etal.A Substation Backup Protection Based on Current Differential Protective Principle[J].Power System Technology,2013,37(4):1113-1120.
[13]李振兴,尹项根,张哲,等.分区域广域继电保护的系统结构与故障识别[J].中国电机工程学报,2011,31(28):95-103.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Study on System Architecture and Fault Identification of Zone-division Wide Area Protection[J].Proceedings of the CSEE,2011,31(28):95-103.
[14]李肖博,肖仕武,刘万顺,等.基于采样值相关度的变压器差动保护[J].现代电力,2005,22(5):23-27.Li Xiaobo,Xiao Shiwu,Li Wangshun,et al.Transformer Differential Protection Based on Correlation Coefficients of Sampled Current Values[J].Modern Electric Power,2005,22(5):23-27.
[15]金恩淑,陈亚潇,扈佃爱,等.考虑电容电流影响的广域电流差动保护[J].电力系统保护与控制,2014,42(19):62-67.Jin Enshu,Chen Yaxiao,Hu Dianai,et al.Wide area current differential protection considering the effects of capacitive current[J].Power System Protection and Control,2014,42(19):62-67.
[16]李振兴,尹项根,张哲,等.有限广域继电保护系统的分区原则与实现方法[J].电力系统自动化,2010,34(19):48-52.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Zone Division and Implementation on Limited Wide Area Protection System[J].Automation of Electric Power Systems,2010,34(19):48-52.
[17]W Cong,Z C Pan,J G Zhao,et al.“A wide area protection system and division of protection IED associated area based on petri net”,2005 IEEE/PES Transmission and Distribution Conference&Exposition:Asia and Pacific 2005,pp:1-5.
[18]姜宪国,王增平,李琛.基于稀疏PMU布点的广域保护全网时间同步方案[J].电力自动化设备,2012,32(9):122-127.Jiang Xianguo,Wang Zengpin,Li Shen.Whole-network time synchronization of wide-area protection based on sparse PMU placement[J].Electric Power Automation Equipment,2012,32(9):122-127.
[19]张怿宁,索南加乐,焦在滨.光纤自愈环网电流纵差保护的数据同步方法[J].电力系统自动化,2006,30(9):44-49.Zhang Yining,Suoan Jiale,Jiao Zaibin.Data Synehronization Method for Current Differential Protection Using Fiber Optic Self-Cure Ring Network[J].Automation of Electric Power Systems,2006,30(9):44-49.
[2]毛安家,张戈力,吕跃春,等.2011年9月8日美墨大停电事故的分析及其对我国电力调度运行管理的启示[J].电网技术,2012,36(4):74-78.Mao Anjia,Zhang Geli,LüYaochun,et al.Analysis on Large-Scale Blackout Occurred in South America and North Mexico Interconnected Power Grid on Sept.8,2011 and Lessons for Electric Power Dispatching in China[J].Power System Technology,2012,36(4):74-78.
[3]汤涌,卜广全,易俊.印度“7.30”、“7.31”大停电事故分析及启示[J].中国电机工程学报,2012,32(25):167-174,23.Tang Yong,Bu Guangquan,Yu Jun.Analysis and Lessons of the Blackout in Indian Power Grid on July 30 and 31,2012[J].Proceedings of the CSEE,2012,32(25):167-174,23.
[4]高翔,庄侃沁,孙勇.西欧电网“11.4”大停电事故的启示[J].电网技术,2007,31(1):25-31.Gao Xiang,Zhuang Kanqin,Sun Yong.Lessons and Enlightenment from Blackout Occurred in UCTE Grid on November4,2006[J].Power System Technology,2007,31(1):25-31.
[5]丁伟,何奔腾,王慧芳,等.广域继电保护系统研究综述[J].电力系统保护与控制,2012,40(1):145-155.Ding Wei,He Benteng,Wang Huifang,et al.Overview of wide-area relaying protection system[J].Power System Protection and Control,2012,40(1):145-155.
[6]王睿,王晓茹,黄飞,等.基于相关矩阵的电网广域后备保护算法[J].电力系统自动化,2013,37(4):69-74.Wang Rui,Wang Xiaoru,Huang Fei,etal.Wide Area Backup Protection Algorithm for Power Grid Based on Correlation Matrix[J].Automation of Electric Power Systems,2013,37(4):69-74.
[7]金恩淑,汪有成,陈喜峰.基于分区域广域继电保护系统的故障识别算法[J].电力系统保护与控制,2014,42(9):68-73.Jin Enshu,Wang Youcheng,Chen Xi.Fault identification algorithm based on zone-division wide area protection system[J].Power System Protection and Control,2014,42(9):68-73.
[8]杨增力,石东源,段献忠.基于方向比较原理的广域继电保护系统[J].中国电机工程学报,2008,28(22):87-93.Yang Zengli,Shi Dongyuan,Duan Xianzhong.Wide-area Protection System Based on Direction Comparison Principle[J].Proceedings of the CSEE,2008,28(22):87-93.
[9]李振兴,尹项根,张哲,等.基于综合阻抗比较原理的广域继电保护算法[J].电工技术学报,2012,27(8):179-186.Li Zhen Xing,Yun Xianggen,Zhang Zhe,et al.A Study of Wide-Area Protection Algorithm Based on Integrated Impedance Comparison[J].Transactions of China Electrotechnical Society,2012,27(8):179-186.
[10]马静,李金龙,叶东华,等.基于故障匹配度的广域后备保护新原理[J].电力系统自动化,2010,34(20):55-59.Ma Jing,Li Jinlong,Ye Donghua,et al.A Novel Wide-area Back-up Protection Principle Based on Fault Matching Degree[J].Automation of Electric Power Systems,2010,34(20):55-59.
[11]李振兴,尹项根,张哲,等.基于序电流相位比较和幅值比较的广域后备保护方法[J].电工技术学报,2013,28(1):242-250.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Algorithm of WideArea Protection on Comparison of Current Phase and Amplitude[J].Transactions of China Electrotechnical Society,2013,28(1):242-250.
[12]周泽昕,王兴国,杜丁香,等.一种基于电流差动原理的变电站后备保护[J].电网技术,2013,37(4):1113-1120.Zhou Zexin,Wang Xingguo,Du Dingxiang,etal.A Substation Backup Protection Based on Current Differential Protective Principle[J].Power System Technology,2013,37(4):1113-1120.
[13]李振兴,尹项根,张哲,等.分区域广域继电保护的系统结构与故障识别[J].中国电机工程学报,2011,31(28):95-103.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Study on System Architecture and Fault Identification of Zone-division Wide Area Protection[J].Proceedings of the CSEE,2011,31(28):95-103.
[14]李肖博,肖仕武,刘万顺,等.基于采样值相关度的变压器差动保护[J].现代电力,2005,22(5):23-27.Li Xiaobo,Xiao Shiwu,Li Wangshun,et al.Transformer Differential Protection Based on Correlation Coefficients of Sampled Current Values[J].Modern Electric Power,2005,22(5):23-27.
[15]金恩淑,陈亚潇,扈佃爱,等.考虑电容电流影响的广域电流差动保护[J].电力系统保护与控制,2014,42(19):62-67.Jin Enshu,Chen Yaxiao,Hu Dianai,et al.Wide area current differential protection considering the effects of capacitive current[J].Power System Protection and Control,2014,42(19):62-67.
[16]李振兴,尹项根,张哲,等.有限广域继电保护系统的分区原则与实现方法[J].电力系统自动化,2010,34(19):48-52.Li Zhenxing,Yun Xianggen,Zhang Zhe,et al.Zone Division and Implementation on Limited Wide Area Protection System[J].Automation of Electric Power Systems,2010,34(19):48-52.
[17]W Cong,Z C Pan,J G Zhao,et al.“A wide area protection system and division of protection IED associated area based on petri net”,2005 IEEE/PES Transmission and Distribution Conference&Exposition:Asia and Pacific 2005,pp:1-5.
[18]姜宪国,王增平,李琛.基于稀疏PMU布点的广域保护全网时间同步方案[J].电力自动化设备,2012,32(9):122-127.Jiang Xianguo,Wang Zengpin,Li Shen.Whole-network time synchronization of wide-area protection based on sparse PMU placement[J].Electric Power Automation Equipment,2012,32(9):122-127.
[19]张怿宁,索南加乐,焦在滨.光纤自愈环网电流纵差保护的数据同步方法[J].电力系统自动化,2006,30(9):44-49.Zhang Yining,Suoan Jiale,Jiao Zaibin.Data Synehronization Method for Current Differential Protection Using Fiber Optic Self-Cure Ring Network[J].Automation of Electric Power Systems,2006,30(9):44-49.