Research on multiple boost converter based on MW-level wind energy conversion system

This paper is mainly about the wind energy conversion system with a rated output of 1.2MW which applied to the variable speed constant frequency wind energy system (VSCF). It utilizes the AC-DC-AC power converter to deliver the high-level power energy from permanent-magnet generators to the grid. As the important section of DC energy delivering link in the system, a multiple boost converter controlled by DSP with average current-control strategy is proposed and specifically analyzed in this paper. As the voltage and frequency of turbine generator's output vary along the wind speed change, the multiple boost converter is utilized to maintain constant DC link voltage level high enough for the PWM inverter to transmit energy to the network. The experimental results verify the feasibility of the multiple boost converter used in the wind energy conversion system and confirm the analysis we discussed.