Proposing hybrid controlling logic (HCL) for the wind turbine system with verification by the DSL framework

The concept of hybrid controlling logic (HCL) combining four models (maximum power point tracking (MPPT), maximum-torque loading current, three phase short circuit, and mechanical brake) is proposed in this paper. The HCL gathers the blade's aerodynamic and generator characteristics, and can be designed according to different purposes, such as high efficiency, low noise, and extreme safety. The MPPT is determined by matching the turbine blades and generator in the constant-voltage (CV) mode. As the optimal constant voltage of output is selected, the characteristics of the operating points can be identified. In the model of maximum-torque loading current, the output current of the generator will be raised to meet the maximum torque for braking. The HCL is simulated on a domain-specific language (DSL) framework with random wind speeds. A horizontal wind turbine is treated as a studied case herein. Two HCLs are designed for different purposes: low noise and high efficiency, respectively, and simulated by the DSL framework. It is shown that the proposed HCLs can successfully meet the desired purposes and efficiently restrain the rotating speed within the safe range.