引用本文: | 楼晓轩,宋 平,徐栋杰,周念成,王强钢.基于空充电流的线路保护带负荷试验方法[J].电力系统保护与控制,2021,49(9):129-134.[点击复制] |
LOU Xiaoxuan,SONG Ping,XU Dongjie,ZHOU Niancheng,WANG Qianggang.On-load test of line protection based on no-load charging current[J].Power System Protection and Control,2021,49(9):129-134[点击复制] |
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摘要: |
电流回路变动过的线路保护须进行带负荷试验后才能投入运行。针对常规带负荷试验存在的耗时长、负荷不稳定、改接线风险性大的问题,提出了利用线路在空充状态下的电容电流进行带负荷试验的方法。首先分析了线路空充电流特性及其在带负荷试验中的适用性,给出了空充电流带负荷试验的适用范围。其次通过与常规带负荷试验进行对比,论证了所提出的带负荷试验方法在电流二次回路改接线过程中的安全性。最后通过某220 kV变电站的现场试验测试了该方法的有效性。结果表明,采用线路空充电流进行带负荷试验可在保证试验精确度的前提下缩减设备操作流程,大幅提升电力设备投产效率。 |
关键词: 带负荷试验 电容电流 空充线路 继电保护 |
DOI:DOI: 10.19783/j.cnki.pspc.200816 |
投稿时间:2020-07-11修订日期:2020-09-05 |
基金项目:国家自然科学基金项目(51877017) |
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On-load test of line protection based on no-load charging current |
LOU Xiaoxuan1,SONG Ping1,XU Dongjie1,ZHOU Niancheng2,WANG Qianggang2 |
(1. Hangzhou Power Supply Company, State Grid Zhejiang Electric Power Co., Ltd., Hangzhou 310000, China;
2. State Key Laboratory of Power Transmission Equipment & System Security and New Technology
(Chongqing University), Chongqing 400044, China) |
Abstract: |
Power line protection where the current circuit is modified cannot be put into operation until the on-load test has been carried out. The problems of a normal on-load test are that it is inefficient, unstable and of high risk when modifying the circuit loop. Thus this paper proposes a new on-load test based on capacity current when the power line is unloaded. It demonstrates the characteristics of no-load charging current and explores the application range of this new method. The safety of modifying the circuit loop of this method is proved theoretically and compared with the normal on-load method. This new on-load test method is proved to be effective in practice in a 220 kV power station. The result shows that the on-load test based on capacity current will help simplify operational procedure with a precondition of ensuring accuracy, and this new method will dramatically promote the production efficiency of power equipment.
This work is supported by the National Natural Science Foundation of China (No. 51877017). |
Key words: on-load test capacity current no-load power line relay protection |