| 大串补度输电线路的电流差动保护分析与对策 |
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| 引用本文： | 唐萃,尹项根,戚宣威,朱晓彤,文明浩,张哲.大串补度输电线路的电流差动保护分析与对策[J].电力系统自动化,2015,39(7):157-163. |
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| 作者姓名： | 唐萃 尹项根 戚宣威 朱晓彤 文明浩 张哲 |
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| 作者单位： | 1. 强电磁工程与新技术国家重点实验室，华中科技大学，湖北省武汉市 430074; 电力安全与高效湖北省重点实验室，华中科技大学，湖北省武汉市 430074
2. 南京南瑞继保电气有限公司,江苏省南京市,211102 |
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| 基金项目： | 国家自然科学基金资助项目(51177058，51277084) |
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| 摘 要： | 串联电容补偿技术是超高压及特高压远距离输电中的关键技术之一。随着串联补偿装置的广泛应用和电网的快速发展,有可能出现大串补度输电线路的情况,这将对输电线路继电保护甚至是主保护的动作性能产生影响。文中结合工程实际,对大串补度输电线路的电流差动保护动作特性进行了研究,并分析了过渡电阻、系统的运行方式及功角变化对电流差动保护的影响。根据仿真结果,对提高电流差动保护的灵敏度提出了相应的改进措施。
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| 关 键 词： | 串联电容补偿 线路串联补偿度 输电线路 故障特性 电流差动保护 |
| 收稿时间： | 2014/4/28 0:00:00 |
| 修稿时间： | 2015/1/16 0:00:00 |
Analysis and Countermeasures of Current Differential Protection on Transmission Line with High Series Compensation Degree |
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| TANG Cui,YIN Xianggen,QI Xuanwei,ZHU Xiaotong,WEN Minghao and ZHANG Zhe.Analysis and Countermeasures of Current Differential Protection on Transmission Line with High Series Compensation Degree[J].Automation of Electric Power Systems,2015,39(7):157-163. |
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| Authors: | TANG Cui YIN Xianggen QI Xuanwei ZHU Xiaotong WEN Minghao and ZHANG Zhe |
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| Affiliation: | State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China,NR Electric Co. Ltd., Nanjing 211102, China,State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China and State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China;Electric Power Security and High Efficiency Laboratory, Huazhong University of Science and Technology, Wuhan 430074, China |
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| Abstract: | Series capacitor compensation technology is one of the key technologies in EHV and UHV long distance transmission. With wide application of the series compensation device and rapid development of the power grid, transmission lines with high series compensation degree may well appear which will affect the protection of transmission lines and even the main protection performance. The operation characteristics of the main protection are studied by referring to engineering practice, and the influence of the transition resistance, system operation mode and power angle on the current differential protection is analyzed. According to the simulation results, countermeasures for improving the sensitivity of differential current protection are presented. This work is supported by National Natural Science Foundation of China (No. 51177058, No. 51277084). |
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| Keywords: | series capacitor compensation line series compensation degree transmission line fault characteristics current differential protection |
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