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电网技术  2012 

同塔架设直流线路的相互影响研究

, PP. 222-228

Keywords: 高压直流输电,同塔架设,直流线路故障,丢失脉冲,EMTDC

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Abstract:

林枫直流与葛南直流是世界上首个同塔双回直流输电工程,同塔架设的直流线路间存在电磁耦合,但各极导线间的耦合关系不会给直流系统稳态运行带来严重影响,只有当直流线路发生接地故障等情况下,故障产生的暂态分量会因电磁耦合的关系及线路参数不平衡等原因影响到其他正常运行的极导线。为此,首先对林枫直流系统调试时直流线路故障和丢失脉冲试验对同塔架设直流的影响进行了分析;其次,利用EMTDC建立同塔双回直流输电研究模型,在重现直流线路故障和丢失脉冲试验的基础上,深入分析了林枫直流一极线路故障导致健全极发生换相失败和林枫直流丢失脉冲故障导致葛南直流发生换相失败的原因。

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