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永磁同步发电系统非线性内模控制

, PP. 128-135

Keywords: 直接转矩控制,永磁同步发电系统,非线性控制,内模控制,空间电压矢量调制

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Abstract:

为了进一步增强永磁同步发电系统发电运行的稳定性,要求控制策略对发电机参数变化及各种不确定干扰具有较强的鲁棒抑制能力。结合非线性反馈线性化技术和内模控制技术,提出一种新型永磁同步发电机(permanentmagnetsynchronousgenerator,PMSG)控制策略。该控制策略以PMSG定子静止坐标系中数学模型为内模,采用一阶低通滤波器将实际电机与内模二输出之差动态系统扩张成一个新型非线性误差系统。基于该扩张系统,根据输入-输出反馈线性化理论推导出定子电压矢量给定。实验结果表明,采用所提控制策略的发电系统具有理想的电磁转矩和定子磁链幅值跟踪性能;对发电机参数变化及负载扰动具有强的鲁棒抑制能力;直流输出电压控制迅速而平稳,系统运行噪音小。

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