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基于预测无差拍算法的永磁同步发电机无传感器控制

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Keywords: 无传感器控制,串联补偿,预测无差拍,同步锁相环

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Abstract:

针对永磁同步发电机(PMSG)提出了一种基于预测无差拍算法的高性能无传感器控制方案。为了获得出色的无传感器控制性能,提出对引入无差拍控制器的估算反电动势进行串联补偿,在改善系统稳定性的同时,实现了定子电流的无静差跟踪。随后,基于Luenberger算法对定子电流超前预测,补偿数字控制一拍滞后的影响,并在维持系统稳定性的前提下,根据离散控制模型设计控制器参数,以改善定子电流环的动态响应及其适应电机参数变化的鲁棒性。在此基础上,基于估算反电动势的同步锁相环(SRF-PLL)能够快速、准确地观测转子的位置角和转速信息,并实现电机控制的同步定向和速度反馈调节。最后,基于10kW永磁同步发电机建立模拟的直驱式发电机组,对本文所提控制方案的有效性和可行性进行了仿真分析和实验验证。

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