应对不可预知型短路电流超标的主动响应型站域保护策略
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摘要
针对电力系统可能存在的不可预知型短路电流超标风险,提出一种主动响应型站域集成保护策略。采用最小二乘短路电流超快速预测,闭锁保护出口以防止断路器强行分闸造成爆炸;并基于短路前后外部系统状态突变,实现无故障进线的背侧系统等值,从而预估短路电流限制措施实施效果,优选站域保护紧急跳闸方案。仿真结果验证所提策略的有效性,为电网不可预知型短路电流超标问题提供一种全新的保护解决思路。
Considering the risk of the unpredictable excessive short-circuit current, this paper put forward an active response substation integrated protection strategy. Superfast short-circuit current prediction using recursive least square algorithm was adopted to block protection so as to avoid the explosion caused by opening the circuit breaker forcibly. Then based on the state change of external system before and after the short-circuit fault, the equivalent of back system of incoming lines without fault was realized to estimate the effect of short-circuit current limiting measures and choose the optimal substation-area emergency tripping scheme. The simulation results verified the effectiveness of the proposed strategy. This paper provided a new protection-based solution to the problem of the unpredictable excessive short-circuit current.
Considering the risk of the unpredictable excessive short-circuit current, this paper put forward an active response substation integrated protection strategy. Superfast short-circuit current prediction using recursive least square algorithm was adopted to block protection so as to avoid the explosion caused by opening the circuit breaker forcibly. Then based on the state change of external system before and after the short-circuit fault, the equivalent of back system of incoming lines without fault was realized to estimate the effect of short-circuit current limiting measures and choose the optimal substation-area emergency tripping scheme. The simulation results verified the effectiveness of the proposed strategy. This paper provided a new protection-based solution to the problem of the unpredictable excessive short-circuit current.
引文
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[18]邵文权,宋国兵,索南加乐,等.带并联电抗器输电线路三相自适应重合闸永久性故障判别[J].中国电机工程学报,2010,30(4):91-98.Shao Wenquan,Song Guobing,Suonan Jiale,et al.Identification of permanent faults for three-phase adaptive reclosure of the transmission lines with shunt reactors[J].Proceedings of the CSEE,2010,30(4):91-98(in Chinese).
[19]Fitton D S,Dunn R W,Aggarwal R K,et al.Design and implementation of an adapative single pole autoreclosure technique for transmission lines using artificial neural networks[J].IEEE Transactions on Power Delivery,1996,11(2):748-756.
[20]黄智慧,段雄英,邹积岩,等.基于改进RLS算法的故障电流参数估计[J].中国电机工程学报,2014,34(15):2460-2469.Huang Zhihui,Duan Xiongying,Zou Jiyan,et al.Fault current parameter estimation based on adaptive RLSalgorithm[J].Proceedings of the CSEE,2014,34(15):2460-2469(in Chinese).
[2]袁娟,刘文颖,董明齐,等.西北电网短路电流的限制措施[J].电网技术,2007,31(10):42-45.Yuan Juan,Liu Wenying,Dong Mingqi,et al.Application of measures limiting short circuit currents in northwest china power grid[J].Power System Technology,2007,31(10):42-45(in Chinese).
[3]孙奇珍,蔡泽祥,李爱民,等.500k V电网短路电流超标机理及限制措施适应性[J].电力系统自动化,2009,33(21):92-96.Sun Qizhen,Cai Zexiang,Li Aimin,et al.A short-circuit current over-limited mechanism of 500k V power system and the adaptability of limiting measures[J].Automation of Electric Power Systems,2009,33(21):92-96(in Chinese).
[4]杨雄平,李力,李扬絮,等.限制广东500k V电网短路电流运行方案[J].电力系统自动化,2009,33(7):104-107.Yang Xiongping,Li Li,Li Yangxu,et al.Research on short-circuit current exceeding limit of 500k V power network in Guangdong in 2009[J].Automation of Electric Power Systems,2009,33(7):104-107(in Chinese).
[5]武守远,荆平,戴朝波,等.故障电流限制技术及其新进展[J].电网技术,2008,32(24):23-32.Wu Shouyuan,Jing Ping,Dai Chaobo,et al.Fault current limiting measures and their recent progress[J].Power System Technology,2008,32(24):23-32(in Chinese).
[6]周坚,胡宏,庄侃沁,等.华东500k V电网短路电流分析及其限制措施探讨[J].华东电力,2006,34(7):55-59.Zhou Jian,Hu Hong,Zhuang Kanqin,et al.Short-circuit current of 500k V East China power grid and its limitation[J].East China Electric Power,2006,34(7):55-59(in Chinese).
[7]张永康,蔡泽祥,李爱民,等.限制500k V电网短路电流的网架调整优化算法[J].电力系统自动化,2009,33(22):34-39.Zhang Yongkang,Cai Zexiang,Li Aimin,et al.An optimization algorithm for short-circuit current limitation of 500k V power grid by adjusting power grid configuration[J].Automation of Electric Power Systems,2009,33(22):34-39(in Chinese).
[8]Erkhan F M.Factors affecting values of short-circuit current levels in electrical power engineering systems[J].IEEE Trans.on Power Systems,2003,8(6):15-21.
[9]刘楠,唐晓骏,马世英,等.负荷模型对电力系统短路电流计算的影响[J].电网技术,2011,35(8):144-149.Liu Nan,Tang Xiaojun,Ma Shiying,et al.Influences of load models on power system short-circuit current calculation[J].Power System Technology,2011,35(8):144-149(in Chinese).
[10]王皓怀,唐宝,刘淼,等.基于IEC60909的南方电网短路电流计算方法分析及优化[J].中国电力,2015,48(10):90-96.Wang Haohuai,Tang Bao,Liu Miao,et al.Analysis and optimization of short-circuit calculation method in CSGbased on IEC60909[J].Electric Power,2015,48(10):90-96(in Chinese).
[11]刘楠,张彦涛,秦晓辉,等.感应电动机负荷对短路电流影响机理研究[J].电网技术,2012,36(8):187-192.Liu Nan,Zhang Yantao,Qin Xiaohui,et al.Impact of load induction motor on power system short-circuit current calculation[J].Power System Technology,2012,36(8):187-192(in Chinese).
[12]汤涌,张红斌,侯俊贤,等.考虑配电网络的综合负荷模型[J].电网技术,2007,31(5):34-38.Tang Yong,Zhang Hongbin,Hou Junxian,et al.Asynthesis load model with distribution network[J].Power System Technology,2007,31(5):34-38(in Chinese).
[13]王铁柱,万磊,卜广全,等.逆变侧交流系统三相短路时直流系统贡献短路电流的机理和计算方法研究[J].电网技术,2016,40(5):1313-1319.Wang Tiezhu,Wan Lei,Bu Guangquan,et al.Mechanism and calculation method study of DC system contributed short-circuit current with three-phase short-circuit fault on inverter side[J].Power System Technology,2016,40(5):1313-1319(in Chinese).
[14]袁阳,卫志农,雷霄,等.直流输电系统换相失败研究综述[J].电力自动化设备,2013,33(11):140-147.Yuan Yang,Wei Zhinong,Lei Xiao,et al.Survey of commutation failures in DC transmission systems[J].Electric Power Automation Equipment,2013,33(11):140-147(in Chinese).
[15]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(in Chinese).
[16]王智冬.交流系统故障对特高压直流输电换相失败的影响[J].电力自动化设备,2009,29(5):25-29,38.Wang Zhidong.Impact of AC system fault on UHVDCcommutation failure[J].Electric Power Automation Equipment,2009,29(5):25-29,38(in Chinese).
[17]索南加乐,邵文权,宋国兵.基于参数识别的单相自适应重合闸研究[J].中国电机工程学报,2009,29(1):48-54.Suonan Jiale,Shao Wenquan,Song Guobing.Study on single-phase adaptive reclosure scheme based on parameter identification[J].Proceedings of the CSEE,2009,29(1):48-54(in Chinese).
[18]邵文权,宋国兵,索南加乐,等.带并联电抗器输电线路三相自适应重合闸永久性故障判别[J].中国电机工程学报,2010,30(4):91-98.Shao Wenquan,Song Guobing,Suonan Jiale,et al.Identification of permanent faults for three-phase adaptive reclosure of the transmission lines with shunt reactors[J].Proceedings of the CSEE,2010,30(4):91-98(in Chinese).
[19]Fitton D S,Dunn R W,Aggarwal R K,et al.Design and implementation of an adapative single pole autoreclosure technique for transmission lines using artificial neural networks[J].IEEE Transactions on Power Delivery,1996,11(2):748-756.
[20]黄智慧,段雄英,邹积岩,等.基于改进RLS算法的故障电流参数估计[J].中国电机工程学报,2014,34(15):2460-2469.Huang Zhihui,Duan Xiongying,Zou Jiyan,et al.Fault current parameter estimation based on adaptive RLSalgorithm[J].Proceedings of the CSEE,2014,34(15):2460-2469(in Chinese).