Study on Output Voltage of Permanent Magnet Synchronous Generator under Fractional Order Control

Permanent magnet synchronous generator system is generally composed of PMSG and converter. In recent years, permanent magnet synchronous generators have been widely used in various fields due to their low loss and high power factor. However, the output DC voltage is unstable and easily interfered by other factors. How to control DC voltage stability has also become a research hotspot. For DC load, this thesis studies the fractional order control method of output voltage of permanent magnet synchronous generator. The voltage outer loop and current inner loop are controlled by fractional order. We compared the dynamic performance and anti-interference performance between fractional order controller and ordinary PI controller. Finally, the Matlab/Simulink simulation software is used to analyze the system. The results show that fractional order controller has better dynamic performance and anti-interference performance.

I. INTRODUCTION

Compared with the electric excitation synchronous generator and other generators, the permanent magnet synchronous generator (PMSG) is widely used in various fields such as the emergency generators, gas turbine generator and motor generator because of its low loss, high power factor, strong overload rate, quick response, and the advantages of small electromagnetic torque ripple [1]–[2].