Jiook Sin, “병렬 연결된 인버터에서 공통 모드 전압 저감을 위한 새로운 모델 예측 제어 기법,” 아주대학교 공학석사 학위 논문, 2017. > Paper

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Thesis Jiook Sin, “병렬 연결된 인버터에서 공통 모드 전압 저감을 위한 새로운 모델 예측 제어 기법,” 아주대학교 공학석사 학위 논문, 2017.

2017

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This paper presents a reduction method of common mode voltage for parallel connected inverters applied model predictive control

algorithm with subdivided voltage vector. The energy storage system (ESS) using parallel connected inverters can extend the capacity

of total system. In order to control the parallel connected inverters of the ESS, the MPC algorithm with subdivided voltage vector can

be used. It has various voltage vectors unlike the conventional MPC algorithm using the limited number of voltage vectors. Therefore,

it is improved quality of grid currents. However, the common mode voltage (CMV) is generated during its operation. Since the CMV

causes various problems, a number of literatures have studied about reduction methods of the CMV. However, those methods are

increased the total harmonic distortion (THD) of the grid currents. In this paper, the reduction method of the CMV for inverters in

parallel using the model predictive control (MPC) algorithm with subdivided voltage vector is proposed. Through the phase difference

of each inverter, the CMV is reduced in parallel connected inverters. The validity of the proposed reduction method is verified by

simulation and experimental results.

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