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电网技术  2010 

多落点直流输电系统换相失败影响因素的仿真分析

, PP. 59-64

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Abstract:

在多落点高压直流输电系统中,影响换相失败的因素非常复杂。在引出送端多落点概念并建立送端和受端多落点经典模型的基础上,针对耦合导纳、交流系统强度、故障位置这3个方面对系统逆变侧发生换相失败的影响进行了仿真分析。结果表明交直流并联的受端多落点系统存在强、弱临界耦合导纳2个指标,送端多落点存在弱临界耦合导纳,但故障后2系统难以实现同调恢复;非耦合侧系统强度也会影响系统的换相失败,系统强度越大,抵抗换相失败的能力越强,耦合侧系统强度对换相失败的影响更大;不同故障位置和不同耦合侧对换相失败的影响不同。

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