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220kV/110kV同塔四回输电线路双回同时闪络耐雷性能及防治

, PP. 90-96

Keywords: 同塔混压,耐雷性能,同时闪络,EMT

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Abstract:

根据雷击闪络绝缘子串放电发展的物理过程,在电磁暂态程序(EMTP)中建立了220kV/110kV同塔混压四回输电线路雷击闪络模型。在考虑系统工作电压的情况下采用线路耐雷性能实际考量指标,研究了同塔混压四回线路雷击同跳闪络特性及相序排列、耦合地线等防雷措施的配置方式对线路耐雷性能的影响。结果表明:线路耐雷水平随系统电压相位角以近似非标准的正弦波波动;对同塔混压四回线路采用完全逆相序排列方式其单回、双回闪络耐雷性能最佳;在塔顶架设耦合地线对提高线路耐雷性能比在塔底效果更好。

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