宋斯珩;赵书强;

• 1:河北省分布式储能与微网重点实验室(华北电力大学)

摘要(Abstract)：

从电磁转矩角度研究双馈风电场经柔直并网系统的次同步振荡。首先推导电磁转矩与转速之间的幅频关系,发现定子电流受柔直控制器影响,即通过电磁转矩实现风机与柔直的耦合;然后分析该模型电磁转矩的频率响应,分析结果表明在特定频率范围内电磁转矩呈现负阻尼特性引起系统次同步振荡;基于转矩的幅频响应,进一步研究柔直控制器参数和稳态工况对系统稳定性的影响,结果表明增加控制器的比例系数和减少积分增益都对系统稳定性不利;最后通过PSCAD/EMTDC时域仿真验证理论分析的正确性。

关键词(KeyWords)： 双馈风机;柔性直流输电系统;转矩分析法;频率响应;阻尼特性

Abstract:

Keywords:

基金项目(Foundation): 河北省自然科学基金(E2017502075);; 中央高校基本科研业务费重点项目(2018ZD001)~~

作者(Author): 宋斯珩;赵书强;

Email:

DOI: 10.13335/j.1000-3673.pst.2019.0182

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