基于Matlab的交直流混合输电系统的仿真研究

The research on the simulation of hybrid AC/DC power transmission systems based on Matlab

利用S imPowerSystem s工具箱建立了一个两交一直的交直流混合输电系统模型,并对交流故障、直流故障下的系统稳定性和动态响应进行了分析,并给出了仿真结果。通过与交流输电系统仿真结果进行了比较,可以看出,由于直流输电系统的调节速度快和短时过载能力强的特点,所以交直流输电系统具有更好的稳定性能和响应速度。

The researches on the simulation of HVAC/DC hybrid transmission systems are the basis of the analysis about the stability and control of the systems. SimPowerSystems in Matlab is a modern design tool that allows scientists and engineers to rapidly and easily build models that simulate power systems. It can be operated easily with friendly interface. This paper builds a AC/DC hybrid trans- mission systems including two AC lines and one DC line on SimPowerSystems. The simulations are done under the suppositions that there were three-phase fault in AC line and grounding fault in DC line. The dynamics and stability of the systems are presented by the result of the simulations. The speed of regulation of HVDC systems is faster and the ability of overload of HVDC systems is stronger than AC systems, so the HVAC/DC hybrid transmission systems are of higher stability and faster reaction.