一种改进的永磁同步发电机模型预测共模电压抑制方法

发布时间：2018-09-07 16:54

【摘要】：模型预测控制因具有实现简单、控制灵活等优点而在大功率电压源逆变器控制领域受到广泛关注。然而,传统的模型预测控制方法因采用零矢量而导致共模电压较大。直接弃用零矢量的模型预测控制方法虽然可以减小共模电压,但仍然存在计算量较大、开关频率较高等问题。因此,提出了一种改进的永磁同步发电机(permanent magnet synchronous generator,PMSG)模型预测共模电压抑制方法。所提出的方法每个周期采用4个非零矢量进行优化运算,包含3个相邻非零矢量和1个不相邻非零矢量,从而降低了开关频率,且不影响电流控制。此外,文中还通过实验研究了所提出的共模电压抑制算法对PSMG转速控制的影响。实验结果表明,所提方法可以降低共模电压和开关频率,减小计算量,且不影响PMSG的电流和转速控制性能。
[Abstract]:Model predictive control (MPC) has attracted wide attention in the field of high power voltage source inverter because of its advantages of simple implementation and flexible control. However, the common mode voltage of traditional model predictive control method is larger because of zero vector. Although the model predictive control method with zero vector can reduce the common-mode voltage, it still has the problems of large computation and high switching frequency. Therefore, an improved model predictive common mode voltage suppression method for permanent magnet synchronous generator (permanent magnet synchronous generator,PMSG) is proposed. The proposed method uses 4 nonzero vectors to optimize each cycle, including three adjacent non-zero vectors and one non-adjacent non-zero vector, which reduces the switching frequency and does not affect the current control. In addition, the effect of the proposed common mode voltage suppression algorithm on the speed control of PSMG is studied experimentally. The experimental results show that the proposed method can reduce the common-mode voltage and switching frequency, reduce the computational complexity, and do not affect the current and speed control performance of PMSG.
【作者单位】：郑州轻工业学院电气信息工程学院;
【基金】：国家自然科学基金项目(51607159,U1604136) 河南省高校创新人才支持计划(18HASTIT025)~~
【分类号】：TM313

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