高压直流输电系统次同步振荡Hopf分叉现象仿真研究

Simulation Research of Hopf Bifurcation in Subsynchronous Oscillations of HVDC System

基于CIGRE高压直流输电基准模型和IEEE SSR第一基准模型,利用PSCAD/EMTDC软件构造了仿真模型,研究次同步振荡及Hopf分叉现象。应用MATLAB软件,实现自动判别系统相对稳定性的功能。仿真说明:HVDC输电系统次同步振荡与HVDC控制器特性参数有内在联系。存在一个系统临界稳定参数,当参数超过该临界值时,系统失稳;当参数低于该临界值时,系统稳定。

Based on the CIGRE HVDC benchmark model and the IEEE SSR first benchmark model, ttlis paper builds a simulation model by PSCAD/EMTDC to study the subsynchronous oscillation and Hopf bifurcation. And lhe rcdative stability of system is automatically identified by MATLAB. Simulation demonstrates that HVDC subsyn（＇hronoos ost.il- lations is related with the HVDC controller parameters. There is a critical stability parameter, and the system will be instable when controller parameters exceed it, but stable when below this threshold.