基于零序电流注入的配电网故障自愈控制方法  

Fault self-healing control method for distribution network based on zero-sequence current injection

作　　者：张智 李富 王国宇 王坤 ZHANG Zhi;LI Fu;WANG Guoyu;WANG Kun(Wuzhong Power Supply Company,State Grid Ningxia Electric Power Co.,Ltd.,Ningxia 751100,China;Guodian Nanrui Nanjing Control System Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]国网宁夏电力有限公司吴忠供电公司,宁夏吴忠751100 [2]国电南瑞南京控制系统有限公司,江苏南京210000

出　　处：《电力科学与技术学报》2025年第1期92-100,共9页Journal of Electric Power Science And Technology

基　　金：国网宁夏电力有限公司科技项目(5229WZ220009)。

摘　　要：为了准确、快速定位配电网地下电缆的故障,及时完成故障隔离和配电网自愈控制,提出一种基于零序电流注入法的配电网故障自愈控制策略。首先,将分布式零序电流载波信号注入电缆网络中,将注入的载波信号沿电缆传输到变电站;随后,在站内对信号进行信号处理,通过载波信号的信号特征实现配电网快速选线和定位,从而及时隔离故障,实现配电网自愈。所采用的信号发生装置不需要外部电源,该装置可安装在地下电力电缆周围,对地下电缆网络进行改造,既经济又方便。最后,基于MATLAB进行数值仿真,验证所提方法的有效性。To accurately and quickly locate the fault of underground cables of the distribution network and realize the fault isolation and the self-healing control of the distribution network,a fault self-healing control strategy for the distribution network based on the zero-sequence current injection method is proposed.First,a distributed zero-sequence current carrier signal is injected into the cable network,and the carrier signal is transmitted to the substation through the cable.At the substation,the signal is processed,and its characteristics are analyzed to quickly identify the faulty line and locate the fault.This enables timely fault isolation,contributing to the self-healing process for the distribution network.The signal injection device does not require an external power supply,making it easy and cost-effective to install around underground power cables and handle cable network faults.Finally,a numerical simulation is performed on MATLAB,validating the effectiveness of the proposed method.

关 键 词：配电网 电力电缆 自愈控制 信号注入法 零序电流 

分 类 号：TM762[电气工程—电力系统及自动化]