引用本文: | 郭亮,李升健,范瑞祥,等.配网线路开关分级保护配置研究[J].电力系统保护与控制,2018,46(16):155-164.[点击复制] |
GUO Liang,LI Shengjian,FAN Ruixiang,et al.Research on hierarchical protection configuration of distribution line switch[J].Power System Protection and Control,2018,46(16):155-164[点击复制] |
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摘要: |
配网线路普遍存在开关位置设置及定值整定问题,引发线路开关越级跳闸或同时跳闸现象。针对这种情况,综合考虑10 kV配网线路所在变电站的电压等级对保护的时限限制及配变励磁涌流的影响,根据变电站的不同提出不同的线路开关分级保护方法,分别给出不同分级保护原则和对应的定值整定原则。在此基础上,对某省域的10 kV配网线路的系统阻抗进行考察统计,给出了有针对性的分级开关设置位置表及定值整定限值。仿真分析结果和实际线路的应用效果验证了该方法的有效性。 |
关键词: 配网线路 开关分级保护 定值整定 配网励磁涌流 开关位置设置表 |
DOI:10.7667/PSPC171190 |
投稿时间:2017-08-08修订日期:2017-12-30 |
基金项目:国网江西省电力有限公司科技项目(52182017001B)“配网线路开关分级保护配置辅助决策方法及平台研究与应用” |
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Research on hierarchical protection configuration of distribution line switch |
GUO Liang,LI Shengjian,FAN Ruixiang,AN Yi,LIU Bei,CHEN Chen |
(Electric Power Research Institute, State Grid Jiangxi Electric Power Company, Nanchang 330096, China) |
Abstract: |
Problems of switch position location and fixed value setting are common in distribution network, which causes skip tripping or simultaneous tripping of line switches. In view of this situation, considering the influence of voltage level of substation in 10 kV distribution network on the time limit of protection and the inrush current of transformer substation, different switching hierarchical protection methods are put forward according to different substations, and different hierarchical protection principles and corresponding setting principles are given respectively. On this basis, a statistical investigation on 10 kV distribution line system impedance in a domain is made, corresponding grading switch setting position table and setting limits are given. Simulation results and practical application results show the effectiveness of the proposed method. This work is supported by Science and Technology Project of State Grid Jiangxi Electric Power Company Ltd. (No. 52182017001B) “Auxiliary Decision-making Approach and Platform Research and Application of Switch Selective Protection in Distribution Network Line”. |
Key words: distribution network switch hierarchical protection fixed value setting excitation inrush current in distribution network switch position setting list |