计及继电保护动作的电压暂降评估
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摘要
电网线路装设的继电保护装置会显著改变某些电压暂降指标值,计及输配电网中输配电保护动作的电压暂降评估可以提高现有评估方法的准确性与可信度。本文基于电力系统继电保护配置方案的特点,分析阶段式距离保护与反时限电流保护动作对电压暂降幅值、持续时间指标的影响,推导计及保护动作的敏感性负荷故障率计算公式;以IEEE30节点系统为研究对象,将Matlab程序计算的电压暂降幅值、持续时间结果与PSCAD仿真平台的实验结果进行对照;并对某地区66节点孤网系统的敏感性负荷进行评估,对比有无继电保护装置动作的故障率结果。
The relay protection device mounted in the grid line can improve significantly index value of certain voltage transient drop.The voltage transient drop assessment considering power transmission and distribution protection action of the power transmission and distribution grid can improve both accuracy and credibility of the existing assessment method. In this paper,the fault rate calculation formula of sensitive load considering protection action is derived based on feature of relay protection layout proposal of power system,analysis of the influence of step distance protection and inverse time current protection action on voltage transient amplitude and time of duration. The IEEE 30 node system is taken as study target,the voltage transient drop amplitude calculated by Matlab program,result of duration of time and experimental result of PSCAD simulation platform are compared and the sensitive load of 66 node isolated grid system at certain area is assessed and,finally,the result of fault rate with and without relay protection device action is compared.
The relay protection device mounted in the grid line can improve significantly index value of certain voltage transient drop.The voltage transient drop assessment considering power transmission and distribution protection action of the power transmission and distribution grid can improve both accuracy and credibility of the existing assessment method. In this paper,the fault rate calculation formula of sensitive load considering protection action is derived based on feature of relay protection layout proposal of power system,analysis of the influence of step distance protection and inverse time current protection action on voltage transient amplitude and time of duration. The IEEE 30 node system is taken as study target,the voltage transient drop amplitude calculated by Matlab program,result of duration of time and experimental result of PSCAD simulation platform are compared and the sensitive load of 66 node isolated grid system at certain area is assessed and,finally,the result of fault rate with and without relay protection device action is compared.
引文
[1]肖湘宁.电能质量分析与控制[M].北京:中国电力出版社,2010.
[2]杨万清,姜学朴,刘冰.基于MVR和GA的电压暂降监测点优化配置[J].电力电容器与无功补偿,2016,37(6):53-58.YANG Wanqing,JIANG Xuepiao,LIU Bing.Optimal configuration of voltage sags monitoring points based on MVRand GA[J].Power Capacitor&Reactive Power Compensation,2016,37(6):53-58.
[3]钱叶牛,孙健,迟忠君,等.定制电力技术在北京电力用户中的应用[J].电力电容器与无功补偿,2016,37(6):125-132.QIAN Yeniu,SUN Jian,CHI Zhongjun,et al.Application of custom power technology in Beijing power users[J].Power Capacitor&Reactive Power Compensation,2016,37(6):125-132.
[4]李晨懿,杨家莉,徐永海,等.模糊综合评价在电压暂降源识别中的应用[J].电网技术,2017,41(3):1022-1028.LI Chenyi,YANG Jiali,XU Yonghai,et al.Application of fuzzy comprehensive evaluation in voltage sag source identification[J].Power System Technology,2017,41(3):1022-1028.
[5]GOMEZ J C,MARCOS M M.Effect of distribution system protection on voltage sags[J].IEEE Power Engineering Review,2000,20(5):66-68.
[6]陈礼频,肖先勇,汪颖,等.考虑保护配合动作随机性的电压暂降频次评估[J].电网技术,2012,36(5):132-138.CHEN Lipin,XIAO Xianyong,WANG Ying,et al.Voltage sags frequency estimation considering randomness of protection and coordination action[J].Power System Technology,2012,36(5):132-138.
[7]张国华,杨京燕,张建华,等.计及电压暂降和保护性能的配网可靠性算法[J].中国电机工程学报,2009,29(1):28-34.ZHANG Guohua,YANG Jingyan,ZHANG Jianhua,et al.Arithmetic of distribution network reliability calculation in consideration of voltage sags and protective relays[J].Proceedings of the CSEE,2009,29(1):28-34.
[8]刘健,刘超,张小庆,等.基于供电可靠性的配电网继电保护规划[J].电网技术,2016,40(7):2186-2191.LIU Jian,LIU Chao,ZHANG Xiaoqing,et al.Relay protection planning of distribution network based on power supply reliability[J].Power System Technology,2016,40(7):2186-2191.
[9]王宾,潘贞存,徐文远,等.配电线路电流保护的跌落保护性能评估[J].电力系统自动化,2006(6):25-29.WANG Bin,PAN Zhencun,XU Wenyuan,et al.Evaluation of drop protection performance of current protection of distribution line[J].Automation of Electric Power Systems,2006(6):2-29.
[10]刘玡朋,于明涛,管春伟,等.基于电压暂降的标准SARFI参数与ITIC曲线分析保护装置对电压暂降的影响[J].电网与清洁能源,2015,31(8):15-20.LIU Yapeng,YU Mingtao,GUAN Chunwei,et al.The influence of protection devices on voltage dips based on standard SARFI parameters and ITIC curves of voltage dips[J].Advances of Power System&Hydroelectric Engineering,2015,31(8):15-20.
[11]贺家李,宋从矩.电力系统继电保护原理[M].北京:中国电力出版社,1994.
[12]陈梦骁,王慧芳,刘颖,等.基于相邻站信息的距离后备段动作时间自适应保护方案[J].电网技术,2017,41(2):630-636.CHEN Mengxiao,WANG Huifang,LIU Ying,et al.Selfadaptive protection scheme of distance backup segment action time based on adjacent station information[J].Power System Technology,2017,41(2):630-636.
[13]徐缓.电容器组数字式反时限保护的应用[J].电力电容器与无功补偿,2009,30(4):37-39.XU Huan.Application of digital inverse time protection for capacitor banks[J].Power Capacitor&Reactive Power Compensation,2009,30(4):37-39.
[14]李光琦.电力系统暂态分析[M].北京:中国电力出版社,2004.
[15]汪颖,肖先勇,杨达.敏感设备电压暂降失效事件不确定性的最大混合熵评估[J].电网技术,2012,36(11):159-164.WANG Ying,XIAO Xianyong,YANG Da.Evaluation of maximum mixture entropy for uncertainty of voltage sag event of sensitive equipment[J].Power System Technology,2012,36(11):159-164.
[16]肖先勇,王希宝,薛丽丽,等.敏感负荷电压凹陷敏感度的随机估计方法[J].电网技术,2007(22):30-33.XIAO Xianyong,WANG Xibao,XUE Lili,et al.A method to stochastically estimate voltage sag sensitivity of sensitive equipments[J].Power System Technology,2007(22):30-33.
[2]杨万清,姜学朴,刘冰.基于MVR和GA的电压暂降监测点优化配置[J].电力电容器与无功补偿,2016,37(6):53-58.YANG Wanqing,JIANG Xuepiao,LIU Bing.Optimal configuration of voltage sags monitoring points based on MVRand GA[J].Power Capacitor&Reactive Power Compensation,2016,37(6):53-58.
[3]钱叶牛,孙健,迟忠君,等.定制电力技术在北京电力用户中的应用[J].电力电容器与无功补偿,2016,37(6):125-132.QIAN Yeniu,SUN Jian,CHI Zhongjun,et al.Application of custom power technology in Beijing power users[J].Power Capacitor&Reactive Power Compensation,2016,37(6):125-132.
[4]李晨懿,杨家莉,徐永海,等.模糊综合评价在电压暂降源识别中的应用[J].电网技术,2017,41(3):1022-1028.LI Chenyi,YANG Jiali,XU Yonghai,et al.Application of fuzzy comprehensive evaluation in voltage sag source identification[J].Power System Technology,2017,41(3):1022-1028.
[5]GOMEZ J C,MARCOS M M.Effect of distribution system protection on voltage sags[J].IEEE Power Engineering Review,2000,20(5):66-68.
[6]陈礼频,肖先勇,汪颖,等.考虑保护配合动作随机性的电压暂降频次评估[J].电网技术,2012,36(5):132-138.CHEN Lipin,XIAO Xianyong,WANG Ying,et al.Voltage sags frequency estimation considering randomness of protection and coordination action[J].Power System Technology,2012,36(5):132-138.
[7]张国华,杨京燕,张建华,等.计及电压暂降和保护性能的配网可靠性算法[J].中国电机工程学报,2009,29(1):28-34.ZHANG Guohua,YANG Jingyan,ZHANG Jianhua,et al.Arithmetic of distribution network reliability calculation in consideration of voltage sags and protective relays[J].Proceedings of the CSEE,2009,29(1):28-34.
[8]刘健,刘超,张小庆,等.基于供电可靠性的配电网继电保护规划[J].电网技术,2016,40(7):2186-2191.LIU Jian,LIU Chao,ZHANG Xiaoqing,et al.Relay protection planning of distribution network based on power supply reliability[J].Power System Technology,2016,40(7):2186-2191.
[9]王宾,潘贞存,徐文远,等.配电线路电流保护的跌落保护性能评估[J].电力系统自动化,2006(6):25-29.WANG Bin,PAN Zhencun,XU Wenyuan,et al.Evaluation of drop protection performance of current protection of distribution line[J].Automation of Electric Power Systems,2006(6):2-29.
[10]刘玡朋,于明涛,管春伟,等.基于电压暂降的标准SARFI参数与ITIC曲线分析保护装置对电压暂降的影响[J].电网与清洁能源,2015,31(8):15-20.LIU Yapeng,YU Mingtao,GUAN Chunwei,et al.The influence of protection devices on voltage dips based on standard SARFI parameters and ITIC curves of voltage dips[J].Advances of Power System&Hydroelectric Engineering,2015,31(8):15-20.
[11]贺家李,宋从矩.电力系统继电保护原理[M].北京:中国电力出版社,1994.
[12]陈梦骁,王慧芳,刘颖,等.基于相邻站信息的距离后备段动作时间自适应保护方案[J].电网技术,2017,41(2):630-636.CHEN Mengxiao,WANG Huifang,LIU Ying,et al.Selfadaptive protection scheme of distance backup segment action time based on adjacent station information[J].Power System Technology,2017,41(2):630-636.
[13]徐缓.电容器组数字式反时限保护的应用[J].电力电容器与无功补偿,2009,30(4):37-39.XU Huan.Application of digital inverse time protection for capacitor banks[J].Power Capacitor&Reactive Power Compensation,2009,30(4):37-39.
[14]李光琦.电力系统暂态分析[M].北京:中国电力出版社,2004.
[15]汪颖,肖先勇,杨达.敏感设备电压暂降失效事件不确定性的最大混合熵评估[J].电网技术,2012,36(11):159-164.WANG Ying,XIAO Xianyong,YANG Da.Evaluation of maximum mixture entropy for uncertainty of voltage sag event of sensitive equipment[J].Power System Technology,2012,36(11):159-164.
[16]肖先勇,王希宝,薛丽丽,等.敏感负荷电压凹陷敏感度的随机估计方法[J].电网技术,2007(22):30-33.XIAO Xianyong,WANG Xibao,XUE Lili,et al.A method to stochastically estimate voltage sag sensitivity of sensitive equipments[J].Power System Technology,2007(22):30-33.