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电网技术  2014 

双馈风力发电机串补输电系统全运行区域的次同步特性分析

DOI: 10.13335/j.1000-3673.pst.2014.09.018, PP. 2429-2433

Keywords: 双馈风力发电机,串联补偿,次同步谐振,全运行区域,稳定区

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Abstract:

针对双馈风力发电机串补输电系统中出现的次同步谐振(subsychronousresonance,SSR)问题,现有研究多是针对风机处于最大功率跟踪运行区域的情况进行的,不够全面;风机还有恒转速运行区域和定功率等其它运行区域。对双馈风机全部运行区域进行了分析,以华北地区某风电场实际的风机参数及运行方式为原型,建立了双馈风机与无穷大系统的线性化模型和PSCAD仿真模型,进而利用特征值分析和时域仿真方法对双馈风机串补系统全运行区域的次同步特性进行了研究,得到了SSR稳定区。结果表明在低风速条件下,风机无论运行于最大功率跟踪状态还是其他运行状态都会发生SSR现象;随着风速增大,风机稳定运行区域的面积逐渐增大。据此,对实际风电场的稳定运行提出建议。

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