变电站直流接地探测仪接地查找隐患分析与解决方案  

Research on Hidden Hazard Identification of Substation DC Grounding Detection Instrument

作　　者：郑晓明 陆凯捷 郑霞飞 陈勇 ZHENG Xiaoming;LU Kaijie;ZHENG Xiafei;CHEN Yong(Jinhua Power Supply Company,State Grid Zhejiang Electric Power Co.,Ltd.,Jinhua 32100,Zhejiang Province,China)

机构地区：[1]国网浙江省电力有限公司金华供电公司,浙江金华321000

出　　处：《电力与能源》2025年第1期96-100,共5页Power & Energy

摘　　要：直流系统的稳定运行对变电站的安全至关重要。然而,传统的变电站直流接地探测仪存在扰动和不确定性问题,导致设备精度下降、预测误差增大,进而影响设备的可靠运行。对基于信号注入原理的直流接地探测仪进行了分析,并提出了一种改进型直流接地探测仪。该探测仪可降低继电器误动作的概率,从而提高直流接地故障定位系统的可靠性。The stable operation of the DC system is an important factor in ensuring the safety of substations.However,substation DC grounding detection instruments face disturbances and uncertainties,leading to reduced accuracy and increased prediction errors,which affect the reliable operation of equipment.An analysis of the DC grounding detection instrument based on the signal injection principle is presented,and an improved version of the DC grounding detection instrument is proposed.This improved version can reduce the probability of relay malfunctions,thereby ensuring the reliability of the DC ground fault location system.

关 键 词：变电站 直流接地探测仪 信号注入 

分 类 号：TM52[电气工程—电器]