变电站直流系统主动综合保护技术研究与应用  

Research and Application of Active Integrated Protection Technology for Substation DC System

作　　者：姜坤 胡朗华 谢江媛 王国栋 严建海 陈云峰 JIANG Kun;HU Langhua;XIE Jiangyuan;WANG Guodong;YAN Jianhai;CHEN Yunfeng(Guohua(Jiangsu)Wind Power Co.,Ltd.,Yancheng 224200,China;Nanjing Golden Cooperate DC Power Distribution Technology Co.,Ltd.,Nanjing 211100,China)

机构地区：[1]国华(江苏)风电有限公司,江苏盐城224200 [2]南京国臣直流配电科技有限公司,江苏南京211100

出　　处：《电工技术》2023年第22期162-164,共3页Electric Engineering

摘　　要：针对变电站直流系统综合保护问题,设计了融合多类型故障保护功能的主动综合保护系统。主动综合保护系统包含隔离电源、改进的绝缘监测装置以及常规的A型或F型剩余电流保护装置。通过对常规绝缘监测装置的改进,解决了普通剩余电流保护装置无法实现IT系统直流剩余电流保护的问题。对于轻微故障,改进的绝缘监测装置配合剩余电流保护装置将负载切至隔离电源供电;对于短路故障,在负载切换到隔离电源供电的同时,快速限制短路电流。实测结果表明了系统保护的有效性。Aiming at the integrated protection of substation DC system,an active integrated protection system against multiple types of faults is designed.The active integrated protection system consists of isolated power source,modified insulation monitoring device,and conventional type A or F residual current protection device.The modification of conventional insulation monitoring device addresses the incompetency of common residual current protection device for DC residual current protection of IT system.For minor faults,the modified insulation monitoring device cooperating with the residual current protection device can switch the load to the isolated power source.For short circuit faults,the isolated power source can quickly limit short circuit current.The practical measurements show effectiveness of the system protection.

关 键 词：变电站 直流系统 绝缘监测 隔离电源 

分 类 号：TM773[电气工程—电力系统及自动化]