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电网技术  2014 

天中直流工程入地电流对新疆哈密地区交流电网的影响

DOI: 10.13335/j.1000-3673.pst.2014.08.044, PP. 2298-2303

Keywords: 天中直流工程,当前哈密电网,直流电流分布模型,直流偏磁,治理措施

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Abstract:

为分析天中线直流工程入地电流对当前哈密电网的影响,需建立哈密地区交流电网直流电流分布模型。基于场路耦合方法,根据哈密地区交流电网拓扑结构,将包括变压器、线路的地上模型和包括接地电阻、地表电位的地下模型结合起来,建立哈密地区交流电网直流电流分布模型。通过仿真计算和实地测量验证了模型的准确性,并得到了哈密电网采用当前运行方式下,部分变压器将存在严重的直流偏磁风险的结论。在哈密地区交流电网当前运行方式的基础上,提出合理的治理措施。通过仿真计算和实地测量,验证了针对当前哈密电网直流偏磁问题治理措施的有效性,最后对后续治理措施进行了探讨。

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