不平衡及谐波电网电压下并网逆变器的直接功率控制策略Direct Power Control Strategy of Grid Connected Inverter Under Unbalanced and Harmonic Grid Voltage
年珩;沈永波;宋亦鹏;
摘要(Abstract):
为提高并网逆变器对电网的适应能力,提出了不平衡及谐波电网电压下并网逆变器的直接功率控制策略。建立了同步旋转坐标系下的并网逆变器数学模型;以输出有功和无功功率平稳或输出电流三相平衡且波形正弦为控制目标,在传统直接功率控制基础上引入矢量比例积分(vector proportional integrator,VPI)谐振控制器以抑制功率或者电流的波动;分析了VPI谐振调节器的参数设计规律及不同控制目标下所提策略的控制性能。实验结果验证了所提策略的有效性。
关键词(KeyWords): 不平衡及谐波电网电压;并网逆变器;直接功率控制;矢量比例积分谐振调节器;功率平稳
基金项目(Foundation): 国家863高技术基金项目(2011AA050204)~~
作者(Author): 年珩;沈永波;宋亦鹏;
Email:
DOI: 10.13335/j.1000-3673.pst.2014.06.005
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