DC Traction Power Supply System Based on Modular Multilevel Converter Suitable for Energy Feeding and De-icing  

作　　者：Lingxi Hou Shuqing Zhang Yingdong Wei Xiaoqian Li Qirong Jiang Mingrui Li Weirui Li 

机构地区：[1]Department of Electrical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《CSEE Journal of Power and Energy Systems》2024年第2期649-659,共11页中国电机工程学会电力与能源系统学报（英文）

基　　金：supported in part by National Key Research and Development Program of China(2017YFB1200801);Continuous Co-phase Traction Power System based on Static Power Converter(20192001148).

摘　　要：A novel DC traction power supply system suitable for energy feeding and de-icing is proposed in this paper for an urban rail transit catenary on the basis of the full bridge submodule (FBSM) modular multilevel converter (MMC). The FBSM-MMC is a novel type of voltage source converter (VSC) and can directly control the output DC voltage and conduct bipolar currents, thus flexibly controlling the power flow of the urban rail transit catenary. The proposed topology can overcome the inherent disadvantages of the output voltage drop in the diode rectifier units, increase the power supply distance and reduce the number of traction substations. The flexible DC technology can coordinate multiple FBSM-MMCs in a wide area and jointly complete the bidirectional control of catenary power flow during the operation of the electric locomotive, so as to realize the local consumption and optimal utilization of the recovered braking energy of the train. In addition, the FBSM-MMCs can also adjust the output current when the locomotive is out of service to prevent the catenary from icing in winter. The working modes of the proposed topology are illustrated in detail and the control strategy is specially designed for normal locomotive operations and catenary de-icing. Simulation cases conducted by PSCAD/EMTDC validate the proposed topology and its control strategy.

关 键 词：DC traction power supply system de-icing for catenary energy feeding modular multilevel converter based on full-bridge submodules(FBSM-MMC) urban rail transit 

分 类 号：TM46[电气工程—电器]