便携式直流绝缘检测算法研究与应用  

Research and Application of Portable DC Insulation Detection Algorithm

作　　者：黄海宏[1] 黄煜炜 刘鑫 HUANG Haihong;HUANG Yuwei;LIU Xin(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,Anhui,China;State Grid Anhui Maintenance Corporation,Hefei 230000,Anhui,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]国网安徽省电力有限公司检修分公司,安徽合肥230000

出　　处：《电气传动》2022年第20期44-49,共6页Electric Drive

摘　　要：针对便携式直流绝缘检测装置要求,提出一种基于单桥臂的动态差值算法,并基于该算法设计了一款便携式直流绝缘检测校验一体机。详细分析了单桥臂绝缘监察系统降低继电保护装置误动作风险的原理,展示了直流漏电流传感器零漂变化,推导出能够克服直流漏电流传感器零漂的动态差值算法。通过直流绝缘检测校验一体机实验表明,该算法计算精度较高,可有效解决直流漏电流传感器零漂影响,并能保证直流系统安全。Aiming at the requirements of portable DC insulation detection devices,a dynamic difference algorithm based on single-arm was proposed,and a portable DC insulation detection and verification integrated machine was designed based on this algorithm.The principle of the single-arm insulation monitoring system to reduce the risk of malfunction of the relay protection device was analyzed in detail,and the zero drift change of DC leakage current sensor was demonstrated.The dynamic difference algorithm that can overcome the zero drift of DC leakage current sensor was deduced.The experimental result of the DC insulation detection and verification integrated machine shows that the algorithm has high calculation accuracy,the zero drift effect of DC leakage current sensor can be solved effectively,and the safety of DC power system can be ensured.

关 键 词：便携式直流绝缘检测 动态差值算法 单桥臂 不平衡桥 一点接地误动 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM855