计及涌流影响的零序电流保护风险评估
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摘要
针对高压内置变压器空投导致零序电流保护误动的问题,从系统层面研究计及涌流影响的零序电流保护风险评估,以完善现有风险评估模型在涌流场景下未涉及盲区的不足。考虑影响涌流产生的多因素并非完全可得,提出了一种计及参量完备性的误动概率计算模型。在参量信息缺失不可得时,利用电网设备状态监测数据库中的数据补充计算,并分配相应的权重得到综合加权误动概率。在此基础上给出了具体风险指标和操作建议。通过具体的算例对所提出的风险评估方法进行展示,评估结果与实际运行中线路和母联动作结果一致。
Aiming at the problem of zero sequence current protection caused by high voltage built-in transformer, the risk assessment of zero sequence current protection considering the impact of inrush is studied from the system level in order to improve the shortage of existing risk assessment model in the inrush scene. Considering the multiple factors affecting inrush current is not entirely available, a calculation model of malfunction probability considering the completeness of parameters is proposed. When the missing parameter information is not available, the comprehensive weighted misoperation probability is obtained by using the data in the monitoring database of the power grid equipment state and assigning the corresponding weight. On this basis, specific risk indicators and operational suggestions are given. In this paper, a specific example is given to demonstrate the proposed risk assessment method, and the results are consistent with the actual operation of the line and bus action results.
Aiming at the problem of zero sequence current protection caused by high voltage built-in transformer, the risk assessment of zero sequence current protection considering the impact of inrush is studied from the system level in order to improve the shortage of existing risk assessment model in the inrush scene. Considering the multiple factors affecting inrush current is not entirely available, a calculation model of malfunction probability considering the completeness of parameters is proposed. When the missing parameter information is not available, the comprehensive weighted misoperation probability is obtained by using the data in the monitoring database of the power grid equipment state and assigning the corresponding weight. On this basis, specific risk indicators and operational suggestions are given. In this paper, a specific example is given to demonstrate the proposed risk assessment method, and the results are consistent with the actual operation of the line and bus action results.
引文
[1]尹项根.高阻抗电力变压器涌流特性及其对保护的影响[C]//中国智能电网学术研讨会,2018.
[2]朱韬析,张敏,郭卫明,等.南方电网直流输电工程换流变压器保护系统运行问题分析[J].电力系统保护与控制,2010,38(13):140-143.ZHU Taoxi,ZHANG Min,GUO Weiming,et al.Analysis of the protection systems of converter transformers used in HVDC transmission projects in CSG[J].Power System Protection and Control,2010,38(13):140-143.
[3]李勇,苏钟焕,王然丰,等.高压内置型高阻抗变压器励磁涌流计算分析[J].变压器,2017,54(8):1-5.LI Yong,SU Zhonghuan,WANG Ranfeng,et al.Calculation and analysis of magnetizing inrush current of high impedance transformer with built-in high voltage winding[J].Transformer,2017,54(8):1-5.
[4]李晓华,罗龙波,谢金泉,等.高压内置型高阻抗变压器涌流特性对保护的影响[J].电力系统自动化,2016,40(11):108-114.LI Xiaohua,LUO Longbo,XIE Jinquan,et al.Impact of inrush current characteristics of high-voltage built-in high-impedance transformer on relay[J].Automation of Electric Power Systems,2016,40(11):108-114.
[5]张召峰,孙庆森,张海峰,等.变压器励磁涌流中的信息熵识别[J].电力系统保护与控制,2017,45(12):107-111.ZHANG Shaofeng,SUN Qingsen,ZHANG Haifeng,et al.Identification of information entropy in transformer inrush current[J].Power System Protection and Control,2017,45(15):107-111.
[6]孙庆森,张海峰,王猛,等.小波算法在变压器励磁涌流中的应用研究[J].电力系统保护与控制,2017,45(8):121-125.SUN Qingsen,ZHANG Haifeng,WANG Meng,et al.Application of wavelet algorithm in the transformer inrush current[J].Power System Protection and Control,2017,45(8):121-125.
[7]陈继瑞,张营伟,刘洁,等.一种变压器保护采样可靠性及涌流识别方案的研究[J].电力系统保护与控制,2016,44(14):166-170.CHEN Jirui,ZHANG Yingwei,LIU Jie,et al.A research of transformer protection about sampling reliability and inrush current identification[J].Power System Protection and Control,2016,44(14):166-170.
[8]方愉冬,徐习东,朱炳铨.变压器涌流对零序电流保护的影响分析[J].电力自动化设备,2008,28(9):115-118.FANG Yudong,XU Xidong,ZHU Bingquan.Influence of transformer inrush on zero-sequence current protection[J].Electric Power Automation Equipment,2008,28(9):115-118.
[9]ETO J.CERTS:consortium for electric reliability technology solutions-research highlights[R].Office of Scientific&Technical Information Technical Reports,2003.
[10]“GRID 2030”.A national vision for electricity's second100 years[R].United States Department of Energy Office of Electric Transmission and Distribution,2005.
[11]JIANG K,SING C.Reliability modeling of all-digital protection systems including impact of repair[J].IEEETransactions on Power Delivery,2010,25(2):579-587.
[12]张雪松,王超,程晓东.基于马尔可夫状态空间法的超高压电网继电保护系统可靠性分析模型[J].电网技术,2008,32(13):94-99.ZHANG Xuesong,WANG Chao,CHENG Xiaodong.Reliability analysis model for protective relaying system of UHV power network based on Markov state-space method[J].Power System Technology,2008,32(13):94-99.
[13]王勇,韩学山,丁颖,等.基于马尔科夫链的电力系统运行可靠性快速评估[J].电网技术,2013,37(2):405-410.WANG Yong,HAN Xueshan,DING Ying,et al.Markov chain-based rapid assessment on operational reliability of power grid[J].Power System Technology,2013,37(2):405-410.
[14]戴志辉,王增平,焦彦军.基于动态故障树与蒙特卡罗仿真的保护系统动态可靠性评估[J].中国电机工程学报,2011,31(19):105-113.DAI Zhihui,WANG Zengping,JIAO Yanjun.Dynamic reliability assessment of protection system based on dynamic fault tree and Monte Carlo simulation[J].Proceedings of the CSEE,2011,31(19):105-113.
[15]BERESH R,CIUFO J,ANDERS G.Basic fault tree analysis for use in protection reliability[J].International Journal of Reliability and Safety,2008,2(1):64-78.
[16]葛少云,王浩鸣,徐栎.基于蒙特卡洛模拟的分布式风光蓄发电系统可靠性评估[J].电网技术,2012,36(4):39-44.GE Shaoyun,WANG Haoming,XU Li.Reliability evaluation of distributed generating system including wind energy,solar energy and battery storage using Monte Carlo simulation[J].Power System Technology,2012,36(4):39-44.
[17]沈智健,卢继平,赵渊,等.阶段式电流保护运行风险评估模型[J].中国电机工程学报,2008,28(13):70-77.SHEN Zhijian,LU Jiping,ZHAO Yuan,et al.Operational risk evaluation model of stepped current protection[J].Proceedings of the CSEE,2008,28(13):70-77.
[18]沈智健,周家启,卢继平,等.距离保护运行风险评估模型[J].电力系统自动化,2008,32(12):7-11.SHEN Zhijian,ZHOU Jiaqi,LU Jiping,et al.Operational risk evaluation model of distance protection[J].Automation of Electric Power Systems,2008,32(12):7-11.
[19]王焯,闫奇,戴志辉,等.零序电流保护运行风险评估模型[J].电力系统保护与控制,2012,40(5):16-20.WANG Zhuo,YAN Qi,DAI Zhihui,et al.Operational risk evaluation model of zero sequence current protection[J].Power System Protection and Control,2012,40(5):16-20.
[20]邓红雷,戴栋,李述文.基于层次分析-熵权组合法的架空输电线路综合运行风险评估[J].电力系统保护与控制,2017,45(1):28-34.DENG Honglei,DAI Dong,LI Shuwen.Comprehensive operation risk evaluation of overhead transmission line based on hierarchical analysis-entropy weight method[J].Power System Protection and Control,2017,45(1):28-34.
[2]朱韬析,张敏,郭卫明,等.南方电网直流输电工程换流变压器保护系统运行问题分析[J].电力系统保护与控制,2010,38(13):140-143.ZHU Taoxi,ZHANG Min,GUO Weiming,et al.Analysis of the protection systems of converter transformers used in HVDC transmission projects in CSG[J].Power System Protection and Control,2010,38(13):140-143.
[3]李勇,苏钟焕,王然丰,等.高压内置型高阻抗变压器励磁涌流计算分析[J].变压器,2017,54(8):1-5.LI Yong,SU Zhonghuan,WANG Ranfeng,et al.Calculation and analysis of magnetizing inrush current of high impedance transformer with built-in high voltage winding[J].Transformer,2017,54(8):1-5.
[4]李晓华,罗龙波,谢金泉,等.高压内置型高阻抗变压器涌流特性对保护的影响[J].电力系统自动化,2016,40(11):108-114.LI Xiaohua,LUO Longbo,XIE Jinquan,et al.Impact of inrush current characteristics of high-voltage built-in high-impedance transformer on relay[J].Automation of Electric Power Systems,2016,40(11):108-114.
[5]张召峰,孙庆森,张海峰,等.变压器励磁涌流中的信息熵识别[J].电力系统保护与控制,2017,45(12):107-111.ZHANG Shaofeng,SUN Qingsen,ZHANG Haifeng,et al.Identification of information entropy in transformer inrush current[J].Power System Protection and Control,2017,45(15):107-111.
[6]孙庆森,张海峰,王猛,等.小波算法在变压器励磁涌流中的应用研究[J].电力系统保护与控制,2017,45(8):121-125.SUN Qingsen,ZHANG Haifeng,WANG Meng,et al.Application of wavelet algorithm in the transformer inrush current[J].Power System Protection and Control,2017,45(8):121-125.
[7]陈继瑞,张营伟,刘洁,等.一种变压器保护采样可靠性及涌流识别方案的研究[J].电力系统保护与控制,2016,44(14):166-170.CHEN Jirui,ZHANG Yingwei,LIU Jie,et al.A research of transformer protection about sampling reliability and inrush current identification[J].Power System Protection and Control,2016,44(14):166-170.
[8]方愉冬,徐习东,朱炳铨.变压器涌流对零序电流保护的影响分析[J].电力自动化设备,2008,28(9):115-118.FANG Yudong,XU Xidong,ZHU Bingquan.Influence of transformer inrush on zero-sequence current protection[J].Electric Power Automation Equipment,2008,28(9):115-118.
[9]ETO J.CERTS:consortium for electric reliability technology solutions-research highlights[R].Office of Scientific&Technical Information Technical Reports,2003.
[10]“GRID 2030”.A national vision for electricity's second100 years[R].United States Department of Energy Office of Electric Transmission and Distribution,2005.
[11]JIANG K,SING C.Reliability modeling of all-digital protection systems including impact of repair[J].IEEETransactions on Power Delivery,2010,25(2):579-587.
[12]张雪松,王超,程晓东.基于马尔可夫状态空间法的超高压电网继电保护系统可靠性分析模型[J].电网技术,2008,32(13):94-99.ZHANG Xuesong,WANG Chao,CHENG Xiaodong.Reliability analysis model for protective relaying system of UHV power network based on Markov state-space method[J].Power System Technology,2008,32(13):94-99.
[13]王勇,韩学山,丁颖,等.基于马尔科夫链的电力系统运行可靠性快速评估[J].电网技术,2013,37(2):405-410.WANG Yong,HAN Xueshan,DING Ying,et al.Markov chain-based rapid assessment on operational reliability of power grid[J].Power System Technology,2013,37(2):405-410.
[14]戴志辉,王增平,焦彦军.基于动态故障树与蒙特卡罗仿真的保护系统动态可靠性评估[J].中国电机工程学报,2011,31(19):105-113.DAI Zhihui,WANG Zengping,JIAO Yanjun.Dynamic reliability assessment of protection system based on dynamic fault tree and Monte Carlo simulation[J].Proceedings of the CSEE,2011,31(19):105-113.
[15]BERESH R,CIUFO J,ANDERS G.Basic fault tree analysis for use in protection reliability[J].International Journal of Reliability and Safety,2008,2(1):64-78.
[16]葛少云,王浩鸣,徐栎.基于蒙特卡洛模拟的分布式风光蓄发电系统可靠性评估[J].电网技术,2012,36(4):39-44.GE Shaoyun,WANG Haoming,XU Li.Reliability evaluation of distributed generating system including wind energy,solar energy and battery storage using Monte Carlo simulation[J].Power System Technology,2012,36(4):39-44.
[17]沈智健,卢继平,赵渊,等.阶段式电流保护运行风险评估模型[J].中国电机工程学报,2008,28(13):70-77.SHEN Zhijian,LU Jiping,ZHAO Yuan,et al.Operational risk evaluation model of stepped current protection[J].Proceedings of the CSEE,2008,28(13):70-77.
[18]沈智健,周家启,卢继平,等.距离保护运行风险评估模型[J].电力系统自动化,2008,32(12):7-11.SHEN Zhijian,ZHOU Jiaqi,LU Jiping,et al.Operational risk evaluation model of distance protection[J].Automation of Electric Power Systems,2008,32(12):7-11.
[19]王焯,闫奇,戴志辉,等.零序电流保护运行风险评估模型[J].电力系统保护与控制,2012,40(5):16-20.WANG Zhuo,YAN Qi,DAI Zhihui,et al.Operational risk evaluation model of zero sequence current protection[J].Power System Protection and Control,2012,40(5):16-20.
[20]邓红雷,戴栋,李述文.基于层次分析-熵权组合法的架空输电线路综合运行风险评估[J].电力系统保护与控制,2017,45(1):28-34.DENG Honglei,DAI Dong,LI Shuwen.Comprehensive operation risk evaluation of overhead transmission line based on hierarchical analysis-entropy weight method[J].Power System Protection and Control,2017,45(1):28-34.