University of Tabriz Tabriz Journal of Electrical Engineering 2008-7799 49 3 2019 12 01 A Hybrid Control Strategy Based on Model Predictive Control Approach for the Rectifier Stage of Solid-State Transformer A Hybrid Control Strategy Based on Model Predictive Control Approach for the Rectifier Stage of Solid-State Transformer 1067 1079 9443 FA P. Haghgooei School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran D. A.Khaburi School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran M. Khosravi School of Electrical Engineering, Iran University of Science and Technology, Tehran, Iran Journal Article 2017 11 04 This paper focuses on studying the Solid-State Transformer (SST) and proposing a control strategy for its input stage. The conventional low-frequency transformers suffer some drawbacks such as uncontrolled voltages and currents, high sensitivity to harmonics, low voltage quality in saturation conditions and so on. The solid-state transformer consists of several power electronic converter stages and as it is designed to be utilized as the power supply in electric train applications in this research, it is considered to be step-down and only has a DC output. Therefore, the studied configuration only consists of rectification and DC-DC step-down conversion stages. The main contribution of this paper is to propose a hybrid method based upon the Model Predictive Control (MPC) approach in order to balance the capacitor voltages and also control the power factor of input rectifier. The suggested strategy provides some advantages compared to other methods such as simple algorithm, significantly lower computational burden (compared to the conventional predictive control method) and simultaneous control of the input current, power factor and also the output voltage. Finally, the feasibility of the proposed method is verified through conducting simulations in the MATLAB/Simulink environment. This paper focuses on studying the Solid-State Transformer (SST) and proposing a control strategy for its input stage. The conventional low-frequency transformers suffer some drawbacks such as uncontrolled voltages and currents, high sensitivity to harmonics, low voltage quality in saturation conditions and so on. The solid-state transformer consists of several power electronic converter stages and as it is designed to be utilized as the power supply in electric train applications in this research, it is considered to be step-down and only has a DC output. Therefore, the studied configuration only consists of rectification and DC-DC step-down conversion stages. The main contribution of this paper is to propose a hybrid method based upon the Model Predictive Control (MPC) approach in order to balance the capacitor voltages and also control the power factor of input rectifier. The suggested strategy provides some advantages compared to other methods such as simple algorithm, significantly lower computational burden (compared to the conventional predictive control method) and simultaneous control of the input current, power factor and also the output voltage. Finally, the feasibility of the proposed method is verified through conducting simulations in the MATLAB/Simulink environment. https://tjee.tabrizu.ac.ir/article_9443_54be1ebb47cd4a961cb3795008b8cb53.pdf