PI제어를 이용한 3-Level NPC Inverter의 DC link 불평형 제어

The purpose of this paper is a simple control algorithm for DC link balancing control of 3-Level NPC(Neutral Point Clamped) inverter in wind power generation system. The proposed algorithm use a PI controller for control of DC link balancing, and it's applied to a scale model of wind power generation system. The proposed algorithm is verified by simulation.