基于两相三线制变流器的高速铁路新型同相供电系统仿真计算

Simulative Calculation of Novel Cophase Power Supply System Based on Two-phase Three-wire Converter for High-speed Railway

针对现有同相供电系统采用背靠背结构变流器,存在开关支路多、控制复杂等不足,提出一种应用于高速铁路的两相三线制变流器的同相供电系统结构,该系统与常规单相背靠背变流器结构相比,减少了一条开关臂支路,与三相补偿结构相比减少了一个电抗器,简化了系统结构。本文提出该系统的结构和工作原理,提出负序和谐波补偿控制方法,在MATLAB/Simulink仿真平台上建立电气仿真模型并进行仿真计算。仿真结果验证了本文所提结构和方法的有效性。

In response to some problems in traditional cophase power supply system using back to back structure converter, such as many switching branches and difficulties to control, a novel co phase power supply system based on two phase three wire converter for high speed railway was proposed. The system has a simplified structure, which reduces a switch arm compared with the conventional single phase back to back converter, and reduces an inductor compared with the three phase compensation structure. Firstly, the structure and base principle were analyzed. Secondly, the negative sequence and harmonic detection method was proposed. In the end, the electrical simulation model was built on the MATLAB/Simulink simulation platform. The simulation results proved the validity of the proposed structure and its methods.