Dynamic Modeling and Controller Design for Grid-Connected Ćuk CCM Inverter with Coupled Inductor 커플드 인덕터기반의 계통 연계형 Ćuk CCM 인버터의 동적 모델링과 제어기 설계

 The Transactions of the Korean Institute of Electrical Engineers KIEE Vol. 71, No. 1, p.79-89 Dynamic Modeling and Controller Design for Grid-Connected Ćuk CCM Inverter with Coupled Inductor 커플드 인덕터기반의 계통 연계형 Ćuk CCM 인버터의 동적 모델링과 제어기 설계 김상오

AUTHOR

 (Sang-Oh Kim) 1iD 한병철 (Byeong cheol Han) †iD (School of Electronic and Electrical Engineering,

 Kyungpook National University, Korea.) †Corresponding Author : School of Electronics Engineering, Kyungpook National University, Korea. 

Abstract This paper presents a dynamic modeling and controller design for a grid—connected Ćuk continuous conduction mode (CCM) inverter with a coupled inductor. The primary- and secondary-side inductors of the conventional Ćuk converter are integrated into one coupled inductor in the presented Ćuk CCM inverter, and it reduces the number of passive components. To make the Ćuk CCM inverter with a coupled inductor connected with the grid utility, an output current controller should be designed appropriately. However, the output current control of the presented Ćuk inverter is difficult due to the existence of the right-half plane (RHP) zeros in its transfer function. To solve the problem, a dynamic model of the Ćuk CCM inverter with a coupled inductor is developed and a repetitive controller (RC) coupled with feedback and feedforward controllers is applied to this inverter. A practical design guideline is also presented to select control parameters. Experimental results using a 200-W prototype demonstrate the acceptable performance of the proposed controller.

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