Phase-Lag Compensator based Approach for Realizing MPPT through PMSG based Wind Turbine Generator

Abstract

Proportional-Integral (PI) controllers are widely accepted industrial controllers. These controllers also find their applications in wind energy conversion systems (WECSs). Although such controllers are well researched and developed too, their linear nature and sensitivity of their gains towards variations in plant’s parameter are some noticeable disadvantages associated with them. Moreover, tuning of their gains involves certain approximations, which leads to demean their accuracy. On contrary, the designing of lag-compensators is procedural and discussed well in literature. Although such compensators could not have drawn the attention of wind turbine manufacturers but may a potential candidate for future developments. The focus of this paper is to design phase-lag compensators and use them to extract maximum available power in the wind, at every wind speed upto its rated value. Ability of the compensators is assessed through detailed simulation of a PMSG based WECS in MATLAB/Simulink environment. Observed responses are motivating and demonstrates the effectiveness of the designed compensators.

Keywords

• controller design
• lag compensator
• rotor-field-oriented-control (r-foc)
• tip-speed-ratio (tsr)
• maximum power point tracking (mppt)