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电网技术  2015 

H桥级联型SVG模型预测控制

DOI: 10.13335/j.1000-3673.pst.2015.01.013, PP. 83-89

Keywords: H桥级联型SVG,模型预测控制,评估函数,反馈校正,直流侧电压平衡

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Abstract:

针对H桥级联型静止无功发生器(staticvargenerator,SVG),提出了一种模型预测控制策略。实际交流侧输出电压值与理想的输出电压间存在电压残差,电压残差的存在会使电流跟踪存在误差。为此,利用电压残差与前一时刻的电流值进行反馈校正,构成了闭环优化。利用级联型SVG存在大量开关冗余状态的特点,实现了直流侧电容电压均衡控制,同时降低了开关器件损耗。搭建了仿真平台和试验样机,仿真和实验结果验证了所提策略的有效性。

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