摘要
针对传统配电网继电保护动作延时过长、时限配合复杂、纠错能力弱等问题,以多源配电网结构为例,提出一种基于多端差动电流的广域保护方案。首先,利用区域划分网络,形成子域故障信息矩阵;其次,结合同步采样对时方式由智能电子终端改进矩阵算法实现快速准确定位故障要求;最后,以简单配电网系统算例分析验证该保护方案的有效性与补救能力。
Aiming at the problems of long delay of relay protection,complex time limit and weak error correction ability in traditional power system,a multi-source network structure was taken as an example and a wide-area protection based on multi-terminal differential current was proposed.First of all,a sub-domain fault information matrix was formed by using a regional division network.Secondly,the intelligent electronic devices were used to achieve fast and accurate fault location requirements in combination with synchronous sampling method.Finally,an example analysis of a simple distribution network system showed that the effectiveness and remedial capabilities of the protection scheme and the safety of the stable operation of the power grid and the efficiency of fault location were improved.
作者
韩笑
陈中颖
朱凯
HAN Xiao;CHEN Zhongying;ZHU Kai(Provincal Key Laboratory Of Active Distribution Network,Nanjing 211167,China;State Grid Suzhou Power Supply Company,Suzhou 234000,China)
出处
《电工技术》
2018年第17期22-24,28,共4页
Electric Engineering
关键词
差动电流
故障定位
逻辑矩阵
广域保护
differential current
fault location
logic matrix
wide area protection
