The traction drive system without industrial frequency transformer is the trend and effective lightweight solution of high-speed train in the future. Cascade H-bridge rectifier has become the preferred solution for the front end of this technology due to its modular structure and simple control. In this paper, the working principle of single-phase cascaded H-bridge rectifier is analyzed, and an improved transient direct current control method without phase-locked loop (PLL) is proposed. The command current signal is calculated by the relation of instantaneous power to voltage and current in the two-phase stationary coordinate system to realize the tracking control of the grid current to the voltage. On this basis, aiming at the DC-link voltage imbalance caused by unbalanced loads, a voltage balancing control method without PLL is proposed. Simulation results show the effectiveness of the proposed method.
Transient Direct Current Control of Single-Phase Cascaded H-Bridge Rectifier Without Phase-Locked Loop
Lect. Notes Electrical Eng.
International Conference on Electrical and Information Technologies for Rail Transportation ; 2019 ; Qingdao, China October 25, 2019 - October 27, 2019
Proceedings of the 4th International Conference on Electrical and Information Technologies for Rail Transportation (EITRT) 2019 ; Chapter : 9 ; 93-101
2020-04-08
9 pages
Article/Chapter (Book)
Electronic Resource
English
Single-phase , Cascaded H-Bridge rectifier , Transient direct current control , Phase-locked loop (PLL) , Voltage balancing control Engineering , Transportation Technology and Traffic Engineering , Computational Intelligence , Control and Systems Theory , Information Systems Applications (incl. Internet)
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