Improved bacterial foraging optimization for grid connected wind energy conversion system based PMSG with matrix converter

Abstract

This paper proposes an improved fast dynamic system for controlling Matrix Converter (MC) based on modified hysteresis current controller using optimal tuning PI controller. An improved Bacterial Foraging Optimization (BFO) technique is employed for controlling the active and reactive current components of the Permanent Magnet Synchronous Generator (PMSG) to extract the maximum power from the wind. This proposed controller has the ability to supply the grid by both active and reactive power at normal and fault conditions. Dynamic limiter is employed with the proposed improved BFO controller to control the injected reactive power to the grid during Low Voltage Ride Through (LVRT) at a range limited by MC rated current to improve the system stability. The pitch angle controller with rate limiter was implemented in the proposed controller to protect WECS from mechanical damage. The simulation results prove the validity of the proposed controller under any conditions. Keywords: Wind energy, Permanent magnet synchronous generator, Hysteresis current control, Matrix converter, Bacterial foraging optimization, Low voltage ride through