大型变电站直流巡检装置组合方式分析  

Analysis on the Devices Combination Method of the DC Inspection System in a Large Substation

作　　者：罗智燃 

机构地区：[1]遵义供电局,贵州遵义563000

出　　处：《南方电网技术》2012年第3期115-118,共4页Southern Power System Technology

摘　　要：大型变电站直流巡检系统是用来监视全站直流绝缘状况的,一般采用多台直流绝缘巡检装置并联的方式运行。对这些装置的组合方式进行了分析,指出普遍存在的问题,诸如直流整体绝缘降低、直流一点接地误跳闸、直流母线绝缘或直流馈线绝缘均等下降时的动作死区、"泄漏电流法"检测的固有缺陷等,以及要采取的的改进措施,并对系统改造提出了建议。The DC inspection system in a large substation,which is for inspecting the DC insulation situation in the substation,operates usually with parallel devices.This paper analyzes the usual method of devices combination,pointing out the common problems such as the whole DC insulation level being lower,the mistrip occurring as one-point grounding,the action dead zone appearing as the insulation level of the DC bus or the DC feeder line reducing in balance as well as the inherent defects being with the method of current leaking,and proposes correlative improvement measures and advices for performing the system reform.

关 键 词：直流绝缘 巡检系统 低内阻平衡桥 动作死区 泄漏电流法 

分 类 号：TM63[电气工程—电力系统及自动化]