Design of a Novel Underground Coal Mine 127V Power Supply

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Liu, Jinqi^1 ; Liu, Yizhou^2 ; Wang, Cong^1 ; Zhao, Zhihao^1 ; Hu, Haoyu^1

School of Electrical and Information Engineering, China University of Mining and Technology, Beijing, Beijing, China^1

Taiyuan University of Technology, Taiyuan, China^2

关键词: Co-ordinated control;    Double closed loop control strategies;    High frequency HF;    Isolated dc-dc converters;    One cycle control;    Rectifier circuit;    Underground coal mine;    Unit power factor rectifier;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/4/042076/pdf
DOI  :  10.1088/1757-899X/394/4/042076

来源: IOP

【 摘 要 】

In view of the current disadvantages of the large size, high cost and low power factor of custom transformers in China's coal mine 127V power supply system, a novel type of unit-power factor rectifier based on OCC (One-Cycle Control) is proposed to supply the underground coal mine lighting system. The power supply consists of three stages, including a Vienna rectifier, a high frequency isolated DC-DC converter and an inverter. However, the first two stages of the control circuit use a coordinated control. The circuit is simple to control, unit power factor operation can be realized without the multiplier and input voltage detection and half of the voltage stress of the switching device can be reduced as well. The paper analyses in detail the basic working principle and double closed-loop control strategy of the new rectifier circuit. The correctness is fully verified by simulations.