马伟,侯伟宏,张辉,章玮明,吴佳毅,丁冬,林森
MA Wei,HOU Weihong,ZHANG Hui,ZHANG Weiming,WU Jiayi,DING Dong,LIN Sen

• 1:国网浙江省电力有限公司杭州供电公司
• 2:国网浙江省电力有限公司

摘要(Abstract)：

考虑到快速、准确地故障测距对电力系统具有重要意义,提出了一种适用于T型输电线路的故障测距新方案。首先,通过对故障支路列写局部节点电压方程,推导出T型输电线络的故障稳态等值网络。然后,利用任意两端母线保护安装处的故障稳态电流,建立以故障位置为未知量的方程。最后,采用叠加原理求取故障稳态电流,实现故障测距功能。基于PSCAD/EMTDC平台的仿真结果表明,方案能够快速、准确地计算故障距离,且不受故障类型、故障位置、过渡电阻和负荷电流的影响,具有较高的精度。
In view of the importance of fast and accurate fault location for power system, a new fault location scheme for T-type transmission lines is proposed. Firstly, the equivalent steady-state network of T-type transmission lines in fault is derived by setting local node voltage equation of the fault branch. Secondly, the equation with the fault location as the unknown quantity is established by using the fault steady-state current of bus protection installation position at any two ends. Finally, the fault steady-state current is calculated under the principle of superposition so as to realize the function of fault location. Simulation result based on PSCAD/EMTDC shows that the scheme can calculate the fault distance quickly and accurately and is immune to the fault type, fault point, transition resistance and load current, and has high precision.

关键词(KeyWords)： T型输电线路;故障测距;故障稳态;过渡电阻
T-type transmission lines;fault location;fault steady-state;transition resistance

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司科技项目(521104170012,521101180004);; 国网浙江省电力有限公司科技项目(5211HZ17000A)

作者(Author): 马伟,侯伟宏,张辉,章玮明,吴佳毅,丁冬,林森
MA Wei,HOU Weihong,ZHANG Hui,ZHANG Weiming,WU Jiayi,DING Dong,LIN Sen

DOI: 10.19585/j.zjdl.201901013

参考文献(References)：

• [1]雷振锋,李旭,倪传昆,等.关于T接线路差动保护应用的特殊问题探讨[J].电力系统保护与控制,2009,37(17):57-59.
• [2]赵萍,裘愉涛,徐华,等.适用于多点T接的新型电流差动保护[J].电力系统保护与控制,2017,45(20):152-157.
• [3]郑涛,赵裕童,李菁,等.利用电压幅值差和测量阻抗特征的风电T接线路保护方案[J].电网技术,2017,41(5):1660-1667.
• [4]马静,史宇欣,马伟,等.基于分布参数的双回线跨线及接地故障单端定位方法[J].电网技术,2014,38(9):2525-2531.
• [5]宋艳,曾铁军,于旭东.基于超高压线路参数估计的故障测距算法研究[J].浙江电力,2010,29(3):6-8.
• [6]王波,任雷,王威,等.面向调度应用的输电线路故障定位优化方案研究[J].浙江电力,2014,33(5):1-5.
• [7]卢毅,韩志锟,汪燚春,等.T型输电线路行波故障测距的改进算法[J].电力系统保护与控制,2011,39(5):17-21.
• [8]王召磊,刘明光.基于线性方程组解的T型线路行波测距[J].电网技术,2014,38(4):50-54.
• [9]陈旭,朱永利,赵雪松,等.考虑线路长度变化的T型线路行波测距[J].电网技术,2015,39(5):1438-1443.
• [10]林富洪,王增平,曾惠敏.基于测距函数相位特性的T型高压线路故障定位原理[J].中国电机工程学报,2011,31(13):107-113.
• [11]姚亮,陈福锋,陈琦.一种应用于T接线路的自适应故障测距方法[J].电力系统保护与控制,2012,40(3):26-30.
• [12]陈旭,朱永利,高艳丰,等.基于故障分支快速辨识的T型高压输电线路故障定位新算法[J].电力系统自动化,2016,40(4):105-110.
• [13]王宾,陆元园.利用多时刻信息的T接线路单相接地故障单端测距方法[J].中国电机工程学报,2016,36(10):2611-2618.
• [14]徐慧明,毕天姝,黄少锋,等.计及暂态过程的多支路切除潮流转移识别算法研究[J].中国电机工程学报,2007,27(16):24-40.
• [15]马伟,吴靖,章玮明,等.基于多源信息的输电线路故障定位新方案[J].浙江电力,2017,36(8):24-28.
• [16]MA J,LI J L,THORP J S,et al.A fault steady state component-based wide area backup protection algorithm[J].IEEE Transactions on Smart Grid,2011,2(3):468-475.
• [17]马静,马伟,闫新,等.基于电压相位比较的单相接地距离保护方案[J].电网技术,2015,39(7):2010-2016.