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电网技术  2015 

适用于风电接入系统的相电压暂态量时域选相新原理

DOI: 10.13335/j.1000-3673.pst.2015.08.038, PP. 2320-2326

Keywords: 风电接入系统,时域选相,相电压暂态量,相关性

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Abstract:

风电系统的故障特征导致了传统选相元件存在适用性问题。在分析相电压暂态特征的基础上,提出一种适用于风电接入系统的时域选相元件。理论分析发现,不同故障类型下的各相电压暂态特征之间的相关性存在差异,据此提出了基于相关性的选相判据。新选相原理利用电压量,不受风电系统弱馈性的影响;基于时域暂态量,受风电系统背侧阻抗不稳定的影响较小。利用PSCAD(powersystemscomputeraideddesign)软件的建模仿真结果及现场故障录波数据验证了新选相方法的有效性。

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