0.4kV低压配电系统安装位置的选择与剩余电流参数调整研究  

Research on Mounting Position Selection and Residual Current Parameter Adjustment of 0.4kV Low Voltage Distribution System

作　　者：魏保坛 WEI Bao-tan(Guangzhou Xiesheng Power Mounting Co.Ltd.,Guangzhou 510000,China)

机构地区：[1]广州协晟电力安装有限公司,广东广州510000

出　　处：《电气开关》2021年第3期62-64,67,共4页Electric Switchgear

摘　　要：当前低压配电系统中剩余流量保护装置出现跳闸的主要原因在于:电力用户侧没有对剩余流量保护器进行安装,同时,由于部分0.4kV低压配电线路维护措施不当,导致绝缘老化破损处中的电流在阴雨天气中反流回电源,使流量保护装置出现跳闸故障。目前用于低压配电保护装置的主要原理分为两种,分别是电压动作型与电流动作型。文章先对剩余电流保护装置所在配电系统的位置进行阐明,并通过对市面上代表性电流保护装置进行比对分析,提出优化0.4kV低压配电系统剩余流量参数调整的实效办法,结合《低压配电设计规范》标准化要求,合理调整安装位置与保护参数,以此规避剩余电流导致的跳闸故障。The main reason that residual current flow protector for present low voltage distribution system happens to trip lies in the residual current flow protector not to be mounted for power users side,meanwhile,because of part of improper 0.4kV low voltage distribution line service measures,lead to current in the place of insulated ageing breakage reverse to power source in wet weather,making trip trouble of the flow protector happen.At present,the main principle to be used for low voltage distribution protector is devided into two kinds,which is voltage action type and current action type.First explain the distribution system position where the residual current protector exists and analyze typical current protector for market conditions and put for ward optimizing actual effect method of the residudl flow parameter adjustment of 0.4kV low voltage distribution system.distribution system.Combining the stand ardized requirement for《Low Voltage Distribution Design Specification》to rationaly adjust mounting position and protective parameters in order to avoid trip trouble cansed by the residual current.

关 键 词：参数选择 0.4kV配电系统 剩余流量 电流保护器 

分 类 号：TM726[电气工程—电力系统及自动化]