基于VSC的多端直流输电系统的仿真研究

Simulation of VSC based multi-terminal DC transmission system

基于电压源换流器的直流输电技术(VSC-HVDC)是一种新型的输电技术,笔者分析了VSC-MTDC系统的基本原理和特点及直流输电系统的运行方式,并利用MATLAB/Simulink建立基于VSC换流器的三端和五端直流输电系统的模型,改进了控制系统,最后通过仿真试验,验证了VSC-MTDC系统可以灵活的控制有功功率,且可靠性较高。

VSC- HVDC,shorting for VSC- based high voltage DC transmission is a new DC transmission technology. This paper analyzes the basic principle and characteristics of VSC- MTDC system. Several operating modes for the VSC- MTDC system are analyzed. Then the simulation models of VSC- MTDC are built in MATLAB / Simulink. The control system is modified. Finally,the simulation results verify that VSC- MTDC system can control the active power more flexible with higher reliability.