变电站直流系统级差配合分析和验证系统设计  

Design of Differential Coordination Analysis and Verification System for Substation DC System

作　　者：李超 毛良华 LI Chao;MAO Lianghua(Lishui Electric Power Company,Lishui 323000,China;Lishui Institute for Quality Inspection and Testing,Lishui 323000,China)

机构地区：[1]丽水供电公司,浙江丽水323000 [2]丽水市质量检验检测研究院,浙江丽水323000

出　　处：《电工技术》2023年第16期127-129,170,共4页Electric Engineering

摘　　要：针对变电站直流系统级差配合问题,对直流系统保护电器整定和级差配合要求进行分析,提出可用于设计验证和现场验收的直流系统保护电器级差配合校验系统。通过构建变电站直流系统运行仿真模型,模拟实际故障工况,计算分析各级保护电器的动作时间,从而判断级差配合是否正确,为变电站直流系统设计和工程竣工验收提供很好的验证效果。Aiming at the problem of substation DC system grade difference cooperation,the requirements of DC system protection electrical adjustment and grade difference coordination were analyzed,and a DC system for DC system protection electrical grade difference verification system that could be used for design verification and on-site acceptance was proposed.By constructing the operation simulation model of the DC system of the substation,the actual fault working conditions were simulated,and the action time of the protective appliances at all levels was calculated and analyzed,so as to judge whether the step difference cooperation was correct,which provided a good verification tool for the design and engineering completion acceptance of the DC system of the substation.

关 键 词：直流系统 级差配合 保护电器 仿真建模 

分 类 号：TM732[电气工程—电力系统及自动化]