Composite control for disturbed direct-driven surface-mounted permanent magnet synchronous generator with model prediction strategy

Hong-Jun Shi,Xu-Chen Nie

doi:10.1177/00202940211010829

Abstract

In order to obtain the best power in the wind energy conversion system (WECS) of the direct-driven surface-mounted permanent magnet synchronous generator (SPMSG), active disturbance rejection control (ADRC) is introduced to track the motor speed in real time. The control algorithm provides a new design concept and an inherent robust controller component that requires very little system information. Aiming at the problem of system parameter mutation caused by internal factors and external environment changes, an adaptive controller with multi parameter identification is designed, and the disturbance caused by parameter changes is compensated in real time. The model predictive current control (MPC) technology for the sudden change of external environment is designed to accelerate the response speed of the current loop, so as to weaken the estimation of the current disturbance by the active disturbance rejection controller, and make the speed estimation more accurate. Simulation results show that the proposed control strategy is effective and satisfactory.

Highlights

With the increasingly prominent problems of environmental pollution and energy crisis, the new energy industry has developed rapidly
The current predictive control strategy is designed in this paper for the sudden change of external environment, such as the sudden change of wind speed and moment of inertia, which is different from the application of permanent magnet synchronous motor (PMSM)
active disturbance rejection control (ADRC) technology, inertia identification technology and model predictive current control technology are combined, and the maximum power tracking control of the change of the torque and the moment of inertia for direct-drive permanent magnet synchronous wind turbine system is realized by designing a composite controller

Summary

Introduction

With the increasingly prominent problems of environmental pollution and energy crisis, the new energy industry has developed rapidly. Wind power generation as a new energy development technology has received more and more attention. The research of wind power generation mainly focuses on variable pitch control technology and maximum wind power control scheme. Wind turbine with variable speed is the most widely used power generation equipment in the wind power industry. To get the maximum output power, the speed of variable-speed wind turbine need to be adjusted in real time with the change of external wind speed. Controlling a variable-speed wind turbine below its rated wind speed can be equivalent to controlling the generator’s speed.[1]

Methods

Conclusion