基于PI-PLL的船舶电力推进SVM-DTC系统仿真研究

摘要

Stator flux observation system is not accurate question for Marine Electric Propulsion Direct Torque Control (DTC), This paper introduces technology space vector pulse width modulation (SVPWM) to reduce the current and torque ripple and fixed switching frequency. While using PI-PLL stator flux observer instead of common voltage-current model, combining direct torque control, space vector pulse width adjustment technology and oars model established based on PI-PLL Flux Observer SVM-DTC system simulation model, simulation results show that the accuracy of the stator flux observed a substantial increase in system performance has improved.%针对船舶电力推进直接转矩控制(DTC)系统定子磁链的观测值并不准确的问题,文中引入空间矢量脉宽调剂技术(SVPWM)来降低电流及转矩的脉动,并且固定了开关频率.同时采用基于PI锁相环的定子磁链观测器代替常用的电压-电流模型的方法,结合直接转矩控制、空间矢量脉宽调剂技术以及船桨模型,建立基于PI-PLL磁链观测器的SVM-DTC系统仿真模型,仿真结果表明,定子磁链观测的精度大幅提高,系统的性能有所改善.