조류 터빈 시스템에서 순시무효전력을 이용한 PMSG의 센서리스 제어와 MPPT 제어

초록

This paper presents the MPPT(Maximum Power Point Tracking) and position sensorless control in the seaflow turbin system. The position sensorless algorithm using an instantaneous reactive power of the PMSM is proposed. In the proposed algorithm, the current observer estimates the line currents and the estimated speed can be yield from the information of speed based on back EMF. Also the proposed MPPT algorithm is controlled by tracking the optimal point, of the generator speed and maximum grid power. Therefore, the vector control of the generator side converter and the grid side converter is controlled respectively to obtain maximum torque and regulate unity power factor. The proposed algorithm is verified by using simulation tool.