Sensor and Sensorless Control Methods for Direct Drive PMSG Wind Turbines

Wind Turbine Control System Seminar Report

Wind turbine generators (WTGs) are usually equipped with mechanical sensors to measure wind speed and rotor position for system control, monitoring, and protection.The use of mechanical sensors increases the cost and hardware complexity and reduces the reliability of the WTG systems.This paper focuses on the use of direct drive PMSG in wind power generation.This paper also makes a comparative study on mechanical sensored and sensorless maximum power tracking control for wind turbines directly driving permanent magnetic synchronous generators (PMSGs).

In recent years there has been an increasing awareness about the climate change (global warming) and the harmful e ects that the emissions of CO2 have. This created a higher demand for clean and sustainable energy sources like: wind, sea, sun, biomass etc. The wind energy has experienced the biggest growth in the past 10 years.This is because wind energy is a pollution-free resource,which has an inexhaustible potential and also because of its increasingly competitive cost.The generation capacity increased from 26000MW in 2001 to 507000 MW in 2010.It can operate in conjunction with grid or in isolation, based on this they can be classi ed as grid connected or standalone systems.The another factor concerned with wind power generation is that the control strategies employed.Control, monitoring, and protection of WTGs usually requires the information of wind speed and generator rotor position. These can be measured by well calibrated mechanical sensors, such as anemometers and rotor position sensors or by a sensorless control.The problems incurred in using mechanical sensors can be solved through mechanical sensorless control.

>Doide recti er based PMSG

>Doide recti er based PMSG

>WECS- controlled system with anemometer

>MARS control 

>Neural network structure

>Block diagram of sliding mode observer

>Con guration of a Direct-Drive PMSG Wind Turbine System

>BPANN-based optimal shaft speed reference determination

>Block diagram of the sliding mode observer

>Sensorless control for the PMSG wind turbine

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