Design of digital hysteresis current control circuit in AC-DC converter for wind power generation

The purpose of this paper is to present a design of digital hysteresis current control circuit in ac-dc converter for wind power generation. The control circuit utilizes a digital signal processor and an analog reactor current detector using an RC integrator. In the proposed method, the design of time constant of RC integrator is important to determine the operation range of duty ratio. The design method of the proposed control circuit is therefore described from the analysis result under the steady-state operation. The analysis result is verified by simulation results of 600W ac-dc converter for wind power generation.