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电网技术  2007 

电气化铁路接入电力系统的电压等级问题

, PP. 12-17

Keywords: 电力系统,电压等级,电气化铁路,三相不平衡,谐波

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Abstract:

以高速电气化客运专线工程为背景,从接触网电压降落、三相电压不平衡度和谐波等方面详细分析了采用三相变压器、V/v接线变压器和单相牵引变压器以带回流的直接供电方式和自耦变压器供电方式分别接入110kV和220kV电力系统时普速电气化铁路和高速电气化铁路对系统短路容量的要求和对其造成的影响,讨论了普速电气化铁路和高速电气化铁路接入电力系统的电压等级问题。计算分析结果表明对于普速电气化铁路,应优先考虑将其接入110kV电力系统,接入点的短路容量应大于牵引变压器额定容量的25倍;对于高速电气化铁路,应优先考虑将其接入220kV电力系统,接入点的短路容量应大于牵引变压器额定容量的35倍。

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