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| Research on improving sensitivity of 220kV main transformer impedance protection |
| Feng Xiaoping1, Zhou Jie2, Meng Xinggang1, Zhao Qingchun3 |
1. Xinjiang Electric Power Dispatching and Communication Center, Urumqi 830011;
2. State Grid Electric Power Research Institute of Xinjiang Electric Power Company, Urumqi 830011;
3. NR-Relays Electric Co., Ltd, Nanjing 210000 |
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Abstract In the 220kV and 110kV voltage class power grids, the main protection and near- reserve protection can meet the requirements for rapid fault removal in most fault situations, and the dependence on the far reserve protection is reduced. However, in some special cases, far reserve protection action is still needed to isolate the failure, so the sensitivity of far reserve protection is required. At present, when the actual transformer impedance protection is used as the remote backup protection of adjacent lines, it may be difficult to cooperate because of the setting range. Moreover, when some ultra-long line ends fail, the over-current protection can not meet the sensitivity requirements. In order to satisfy the requirement of 220kV main change reserve protection to make the adjacent line far reserve sensitivity, prevent the occurrence of protection error action, it is necessary to conduct in-depth research and analysis on the method of improving the sensitivity of the transformer impedance protection, and propose a feasible solution to solve the problem of partial reserve protection.
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Received: 29 January 2019
Published: 12 September 2019
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| Cite this article: |
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Feng Xiaoping,Zhou Jie,Meng Xinggang等. Research on improving sensitivity of 220kV main transformer impedance protection[J]. Electrical Engineering, 2019, 20(9): 114-116.
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| URL: |
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http://dqjs.cesmedia.cn/EN/Y2019/V20/I9/114
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[1] DL/T 559—2007. 220kV~750kV电网继电保护装置运行整定规程[S].
[2] Q/GDW 10422—2017. 国家电网继电保护整定计算技术规范[S].
[3] DL/T 584—2007. 3~110kV电网继电保护运行整定规程[S].
[4] GB/T 14285—2006. 继电保护和安全自动装置技术规程[S].
[5] Q/GDW1175—2013. 变压器、高压并联电抗器和母线保护及辅助装置标准化设计规范[S].
[6] 高中德, 舒治淮, 王德林. 国家电网公司继电保护培训教材[M]. 北京: 中国电力出版社, 2009.
[7] 崔家佩. 电力系统继电保护与安全自动装置整定计算[M]. 北京: 中国电力出版社, 1993.
[8] 吕冉, 李慧, 刘鹏, 等. 和阻抗继电器的改进形式及其动作性能分析[J]. 中国电机工程学报, 2018, 38(7): 2001-2011.
[9] 尤田柱. 四边形阻抗特征值分析与应用[J]. 电气技术, 2013, 14(5): 98-100, 106.
[10] PCS-931-G系列超高压线路成套保护装置说明书[Z].南京南瑞继保电气有限公司, 2016. |
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2019, Vol. 20 
