低压直流系统剩余电流检测技术研究综述

Review on Research of Residual Current Detection Technology in Low Voltage DC Systems

随着“光储直柔”技术的发展,由低压直流系统剩余电流带来的安全隐患逐渐凸显,剩余电流检测技术越来越得到重视。文中总结了低压直流系统剩余电流故障仿真的进展,仿真分析了低压直流系统典型电击事故和多端电源供电系统的循环净电流,给出了剩余电流检测保护装置的配置指导原则;对比了几类剩余电流检测方法的优势与不足,研究了适用于低压直流系统剩余电流的检测方法与算法;基于相关标准搭建了剩余电流测试平台,测试了中国某厂家的剩余电流检测样机的性能;最后总结了低压直流系统剩余电流检测技术的研究进展与发展前景。

With the development of“photovoltaics,energy storage,direct current and flexibility”technology,safety risks brought by low voltage DC system residual current gradually become prominent,and residual current detection technology has been paid more attention.In this paper,at first the progress of residual current fault simulation in low voltage DC system is summarized,and the typical shock accidents of low voltage DC system and the net circulating current of multi?terminal power supply system are simulated and analyzed,and the guiding principle of the residual current detection and protection device is given.Then the advantages and disadvantages of several kinds of residual current detection methods are compared,and the detection methods and algorithms suitable for low voltage DC system residual current are studied.Furthermore,based on the relevant standards,the residual current testing platform is built,and the performance of the residual current testing prototype of a domestic manufacturer is tested.Finally,the research progress and development prospect of low voltage DC system residual current detection technology are summarized.