Pitch Controller Design of Wind Turbine Based on Nonlinear PI/PD Control

Feihang Zhou,Jun Liu

doi:10.1155/2018/7859510

Abstract

This paper analyzed and discussed the nonlinear PI/PD control for wind energy conversion system (WECS) pitch controller design. The nonlinear PI/PD controller consists of a classical PI/PD controller and a nonlinear gain table. In this paper, the detailed design procedures of the controller including not only the selection of control parameters but also the formulation of nonlinear gain table were given. In order to verify the effectiveness and correctness of the algorithm, a detailed 2 MW simulation test platform based on MATLAB/SIMULINK environment was established. Meanwhile, some valuable conclusions were also obtained. The presented contents of this article have the reference value and guiding significance for practical engineering application.

Highlights

With the global climate problem increasingly prominent and nonrenewable energy sources being largely consumed, the exploration and utilization of renewable energy sources such as wind energy and solar energy have been paid to a high attention
Compared with doubly-fed induction generator (DFIG), permanent magnet synchronous generator (PMSG) has many superior characteristics such as more efficient performance, higher reliability, and wider speed control range and is gradually becoming the first choice [9]. erefore, the wind energy conversion system (WECS) based on PMSG was selected for research in this paper
WECS is mainly constitutive of wind turbine, transmission chain, permanent magnet synchronous generator, generatorside converter, DC bus, and the grid-side inverter

Summary

Introduction

With the global climate problem increasingly prominent and nonrenewable energy sources being largely consumed, the exploration and utilization of renewable energy sources such as wind energy and solar energy have been paid to a high attention. As the fastest growing renewable energy sources in the recent years [1,2,3,4], wind generation is the most prevalent in coastal regions spanning temperate and boreal climates. In the partial-load region, the control goal of the wind power system is generally to capture the maximum wind energy in order to achieve the maximum economic benefit. In the full-load region, the variable propeller is important At this time, the generator-output power is limited at the rated value by the pitch control since the capacity of the generator and converter is limited [10, 11].

Mathematical Model of WECS

Design of Controller

Validation of Algorithm by Simulation

Conclusion