±800kV特高压直流换流站金属回线避雷器(简称:EM避雷器)多次故障分析将原因指向能量耐受性能薄弱电阻片(简称:“矮片”)存在导致的避雷器吸收能量崩溃损坏,为解决EM避雷器故障频发问题,利用PSCAD/EMTDC仿真软件研究系统过电压情况,明确EM避雷器运行中的决定性工况,根据实际需求和设计裕度优化EM避雷器的参数配置和结构型式。参数配置方面,依据过电压计算结果,采用能量吸收和保护水平校验方法,建议提高避雷器的参考电压,增加并联元件数量、提升单片电阻片的能量吸收能力;结构优化方面,采用ATP ...
王陆璐 +4 more
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