电力系统自动化2017，Vol.41Issue(15)：170-175,6.DOI:10.7500/AEPS20161107008
电缆分布电容对出口继电器动作的影响分析及应对措施
Analysis on Influence of Distributed Capacitance of Cables on Export Relay and Relevant Measures
雷兴 1潘学萍 2孙彬 2徐楠 1贾涛 3许昭德4
作者信息
- 1. 国网上海市电力公司检修公司, 上海市 201204
- 2. 河海大学能源与电气学院, 江苏省南京市 210098
- 3. 国网技术学院, 山东省济南市 250002
- 4. 深圳奥特迅电力设备股份有限公司, 广东省深圳市 518057
- 折叠
摘要
Abstract
Eighteen major anti-accident measures taken by State Grid Corporation of China make the corresponding requirements on relay operating power and action voltage from the point of view of design.But if direct current (DC) grounding fault or alternating current (AC) intruding happens,when distributed capacitance of control cables exceeds the critical value,the export relay may still malfunction.The on-line monitoring system of distributed capacitance of control cables is built to realize early warning of the risk: firstly,the low-frequency alternating current signal is injected into the DC system;then,the AC current value is measured and the distributed capacitance is calculated;finally,the measured value is compared with the critical value.In order to measure the distributed capacitance accurately and steadily,a small AC and DC measurement current transformer is designed using the magnetic saturation principle and flux induction principle.Based on constant resistance mode of DC electronic load,a voltage equalization module is designed to balance DC bus voltage.关键词
分布电容/直流接地/动作功率/动作电压/母线电压Key words
distributed capacitance/direct current grounding/operating power/action voltage/bus voltage引用本文复制引用
雷兴,潘学萍,孙彬,徐楠,贾涛,许昭德..电缆分布电容对出口继电器动作的影响分析及应对措施[J].电力系统自动化,2017,41(15):170-175,6.
