六相永磁同步发电机占空比模型预测直接功率控制

针对传统六相永磁同步发电机(PMSG)单矢量模型预测直接功率控制(MPDPC)电流谐波大、有功和无功功率波动剧烈的问题,提出了一种占空比合成矢量MPDPC。通过对六相整流器的最大和中大电压矢量进行重构,获得12个合成矢量,实现了对谐波电流的有效抑制。在此基础上,提出在每个周期内同时作用一个合成矢量和零矢量,并根据有功和无功预测无差拍原理计算最优占空比,进一步抑制了有功和无功功率脉动。试验结果表明,所提占空比合成矢量MPDPC可以有效减少电流谐波和功率脉动。

Duty Cycle Model Predictive Direct Power Control for Six-Phase Permanent Magnet Synchronous Generator

Large current harmonics and severe fluctuations occur in active and reactive power for single vector model predictive direct power control (MPDPC) of six phase permanent magnet synchronous generator (PMSG). Aiming at these problems, a duty cycle synthetic vector MPDPC is proposed. By reconstructing the large and medium large voltage vectors of the six phase rectifier, twelve synthetic vectors are obtained, and the harmonic currents are effectively suppressed. On this basis, aiming at further suppressing the fluctuation of active and reactive power, a synthetic vector and a zero vector are used simultaneously in each cycle, and the optimal duty cycle is calculated according to the principle of deadbeat prediction of active and reactive power. Experimental results show that the proposed duty cycle synthetic vector MPDPC can effectively reduce current harmonics and power ripples.