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含大规模风电送端系统对直流系统的影响

DOI: 10.13336/j.1003-6520.hve.2015.03.005, PP. 730-738

Keywords: 交直流混联系统,大规模双馈风电场,送端系统,运行方式,短路故障,稳定性

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Abstract:

随着大规模风电的开发与利用及交直流混联电网的形成,为了研究含大规模风电场的送端系统对直流系统的影响,针对大规模双馈风电场多端交直流外送系统,构建了交直流并联与非并联运行方式下网络拓扑结构;研究了3种情况即风电场风速变化、风电场故障、换流母线故障时送端系统对直流系统的影响。基于PSCAD/EMTDC软件,搭建了仿真模型,并进行了仿真分析,得到了仿真实验数据和曲线;由仿真结果得到以下结论风电场处于噪声风时,为保证系统频率稳定所需的火电容量最大;当交直流系统采用非并联运行方式时,风电场故障对直流系统的影响最小;3种运行方式下换流站交流母线故障对直流系统影响差异不大。

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