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首页> 外文期刊>Power Electronics, IET >Common-mode voltage mitigation with a predictive control method considering dead time effects of three-phase voltage source inverters
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Common-mode voltage mitigation with a predictive control method considering dead time effects of three-phase voltage source inverters

机译：考虑到三相电压源逆变器死区时间影响的预测控制共模电压缓解

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摘要

This study proposes a technique to mitigate common-mode voltages with dead time effects taken into account in three-phase voltage source inverters (VSIs), on the basis of finite-set model predictive control methods. The effects of dead time on common-mode voltage in three-phase VSIs controlled by the model predictive control method are investigated. On the basis of the investigation, a common-mode voltage reduction method is proposed, which is not affected by the inevitable dead time of the VSIs. The proposed method pre-excludes, from the candidates for future vectors, those voltage vectors which can increase the common-mode voltage during the dead time. In addition, when zero vectors are chosen as an optimal vector from the standpoints of current errors, each zero vector is replaced with two non-zero vectors in opposite directions, so as not to deteriorate current performance by simply excluding the zero vectors. On the basis of the proposed pre-selective technique, the proposed method can restrict the common-mode voltage within ±6 of the three-phase VSIs, whereas the common-mode voltages of the conventional method vary within ±/2. Simulation and experimental results are presented to verify the effectiveness of the proposed method.
机译：这项研究提出了一种在有限集模型预测控制方法的基础上，考虑到三相电压源逆变器（VSI）中死区时间影响的共模电压缓解技术。研究了死区时间对模型预测控制方法控制的三相VSI中共模电压的影响。在调查的基础上，提出了一种共模降压方法，该方法不受VSI不可避免的死区时间的影响。所提出的方法从未来向量的候选中预先排除了可以在空载时间内增加共模电压的那些电压向量。另外，当从电流误差的角度选择零向量作为最佳向量时，每个零向量被相反方向上的两个非零向量代替，从而通过简单地排除零向量而不会恶化电流性能。基于提出的预选择技术，提出的方法可以将共模电压限制在三相VSI的±6范围内，而传统方法的共模电压则在±/ 2范围内变化。仿真和实验结果表明了该方法的有效性。

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