Wind Turbine Generator Emulator with Current Control mode

This paper proposes an emulator for a wind turbine generator with a current control mode to emulate a current source. In this paper, the emulator uses the current control mode without voltage controller to consider the generator as a current source. The emulator is used to verify the power converter connected to the wind turbine. A three-phase inverter with the current controller is applied in the emulator of the wind turbine generator. In addition, the current control command of the emulator is calculated from the motor equation using the emulator output voltage detection value. Furthermore, the output filter of the emulator is only used inductor. Therefore, low-pass filter composed by RC filter with low cutoff frequency compared with the switching frequency is applied to the emulator voltage detection. In the experimental results, the emulator operates in accordance with the motor equation when the current control response of the emulator and test converter are 4000 rad/s and 100 rad/s. The error voltage between the measurement and theoretical value is less than 17.5% in the experimental results.