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电网技术  2010 

±800kV特高压直流线路复合绝缘子均压环优化设计

, PP. 31-35

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Abstract:

建立了均压环模型,分析了±800kV特高压直流输电线路单V型复合绝缘子悬垂串安装均压环前后的沿面电位和电场强度分布情况,分析后发现未安装均压环时,绝缘子沿面电位分布极不均匀,导线侧电场畸变严重;在导线侧配置大小双均压环、杆塔侧配置中均压环,可有效改善导线侧特别是金具、芯棒、护套界面处的电场分布,有利于防止电晕和提高绝缘子运行可靠性;增加屏蔽深度和外径可明显改善复合绝缘子表面电场分布,管径对均压环自身的表面场强有显著影响。最后推荐了±800kV复合绝缘子均压环的优化配置方案。

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