林永朋;陶顺;肖湘宁;

• 1:新能源电力系统国家重点实验室(华北电力大学)

摘要(Abstract)：

电网电压不平衡时,逆变器的并网功率中含有的二倍频谐波分量使得直流电压波动,影响其稳定性和并网质量。在不平衡电网电压条件下进行逆变器直流电压动态过程及其对输出性能影响的分析,在平衡的电网电压条件下的逆变器PQ控制模型基础上引入一个负序控制环,正负序叠加控制和直流电压控制改善了逆变器的控制效果,使得直流电压和并网功率波动更小,同时直流侧电容电压波动的减小也降低了逆变器并网电流中的3次谐波分量。仿真结果验证了并网逆变器控制策略的有效性和优越性,该方法能够提高了逆变器在电网电压不平衡条件下的稳定运行能力。

关键词(KeyWords)： 电网电压不平衡;PQ控制模型;直流电压;谐波分量;正负序控制

Abstract:

Keywords:

基金项目(Foundation): 国家科技支撑计划(2011BAA01B03)~~

作者(Author): 林永朋;陶顺;肖湘宁;

Email:

DOI: 10.13335/j.1000-3673.pst.2015.06.028

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