Effectiveness analysis of primary and secondary protective measures for 500 kV substation switch transient field

2017 First International Conference on Electronics Instrumentation & Information Systems (EIIS) Pub Date : 2017-06-01 DOI:10.1109/EIIS.2017.8298624

Wang Li, Zhao Hui, Luo Zhengbang, Yu Yongyang, L. Ximin, Xie Yutong

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Abstract

Measurement, monitoring, and other secondary equipment that devolve to switch field are directly exposed to a complex electromagnetic environment and are thus severely disrupted. This study aimed to reduce a fast transient overvoltage and secondary cable terminal interference voltage. Simulation and analysis involved the substation EMTP calculation model of the conducted interference of the primary and secondary systems for the fast transient overvoltage caused by the switching operation and secondary cable in the conducted interference protection measures. Furthermore, various protective measures for the isolating-switch switching no-load transformer were analyzed. Results showed that parallel resistance added to the isolating switch at the primary side, whereas filter capacitance added to the secondary side, both measures significantly reduced overvoltage and interference voltage, and can be easily applied in practical engineering.

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500kv变电站开关暂态场一次、二次保护措施的有效性分析

下放到开关场的测量、监测和其他二次设备直接暴露在复杂的电磁环境中，因此受到严重干扰。本研究旨在降低快速瞬态过电压和二次电缆终端干扰电压。针对开关操作引起的快速瞬态过电压和二次电缆中的传导干扰保护措施，建立了变电站一次系统和二次系统传导干扰的EMTP计算模型进行仿真分析。分析了隔离开关式空载变压器的各种保护措施。结果表明，在初级侧增加隔离开关并联电阻，在次级侧增加滤波电容，均能显著降低过电压和干扰电压，易于在实际工程中应用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2017 First International Conference on Electronics Instrumentation & Information Systems (EIIS)

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