Abstract
In this paper, a novel co-ordinated hybrid maximum power point tracking (MPPT)-pitch angle based on a radial basis function network (RBFN) is proposed for a variable speed variable pitch wind turbine. The proposed controller is used to maximise output power when the wind speed is low and optimise the power when the wind speed is high. The proposed controller provides robustness to the nonlinear characteristic of wind speed. It uses wind speed, generator speed, and generator power as input variables and utilises the duty cycle and the reference pitch angle as the output control variables. The duty cycle is used to control the converter so as to maximise the power output and the reference pitch angle is used to control the generator speed in order to control the generator output power in the above rated wind speed region. The effectiveness of the proposed controller was verified using MATLAB/Simulink software.
Highlights
Renewable energy systems (RES) have drastically increased their contribution in the production of electrical energy, which is environmentally friendly, and minimising the dependency of the fossil fuel based power generation technique
Variable speed wind turbine (VSWT) systems are mostly preferred over fixed speed wind turbines (FSWT) because variable speed wind turbine (VSWT) can harness the electrical power from all wind speed regions by controlling their shaft speed based on the wind velocity
The wind speed and generated speed are considered as the input for the pitch angle control strategy
Summary
Renewable energy systems (RES) have drastically increased their contribution in the production of electrical energy, which is environmentally friendly, and minimising the dependency of the fossil fuel based power generation technique. A novel hybrid MPPT and pitch angle control strategy is employed which can be low rating They are usually not operated when the wind speed exceeds the rated wind speed. The MPPT control technique extracts the maximum available power which is present in the performance of WECS is improved as the system becomes robust and further the cost of repowering available wind speed. By employing this intelligent hybrid control, the performance of WECS is an existing wind turbine is eliminated. This controller works on all the operating regions of the wind system
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