• Home|About JOPS|Editorial Board| Ethics Statement|Indexed-in|Contact us|Peer Review|Chinese
Latest Papers more>>
YANG Runan,HE Jinwei,WANG Xiurui.Research on Model Predictive Control of Voltage of Three-level Bi-directional DC-DC Converter[J].JOURNAL OF POWER SUPPLY,2021,19(2):74-80
Research on Model Predictive Control of Voltage of Three-level Bi-directional DC-DC Converter
Received:December 05, 2019  Revised:March 01, 2021
View Full Text  View/Add Comment  Download reader
DOI:10.13234/j.issn.2095-2805.2021.2.74
Keywords:three-level bi-directional DC-DC converter  model predictive control (MPC)  bi-directional control  neutral-point voltage balance
Fund Project:Project Supported by Research on Hierarchical Coordination Control and Electricity Price Settlement Mechanism of Renewable Energy microgrid
        
AuthorInstitutionEmail
YANG Runan School of Electrical and Information Engineering, Tianjin University, Tianjin , China
HE Jinwei School of Electrical and Information Engineering, Tianjin University, Tianjin , China 18202539408@163.com
WANG Xiurui School of Electrical and Information Engineering, Tianjin University, Tianjin , China
Hits: 98
Download times: 105
Abstract:
      Owing to its advantages such as a high transmission efficiency and small output waveform distortion, the three-level bi-directional DC-DC converter has been widely applied to energy storage systems and other low-voltage and high-current scenarios. However, due to the increase in the number of output levels and the growing modulation complexity, the problem of neutral-point voltage imbalance may occur in its applications. To solve this problem, a model predictive control (MPC) method is proposed to implement the multi-objective optimization control of the voltage of DC bus and that of the voltage-dividing capacitor on the output side. This method realizes the control of the three-level bi-directional DC-DC converter in two steps, i.e., the construction of a prediction model and the optimization of the objective function. As a result, the accuracy and response speed of DC bus voltage regulation are improved while restraining the neutral-point voltage fluctuations. Finally, the proposed strategy is applied to an energy-storage system, and simulations are carried out using Matlab/Simulink. Results validate the effectiveness of the proposed algorithm in the tracking of DC bus voltage and the control of neutral-point voltage balance.
Close