基于Hopf分岔理论的风电系统电压稳定性研究

Wind Power System Voltage Stability Research Based on Hopf Bifurcation Theory

为研究风电系统参数连续变化对其电压稳定性的影响。应用Hopf分岔理论,以风电场有功功率和无功功率为分岔参数,通过延拓法求解单参数Hopf分岔点和两参数Hopf分岔边界,研究了分岔参数对Hopf分岔的影响,并分析了静止无功补偿器(SVC)对Hopf分岔的控制作用。研究表明,风电场的无功消耗会限制有功功率的输出,SVC可以延迟Hopf分岔,提高风电系统电压稳定域度。

In order to study the effect on voltage stability by continuous changes of the wind power system parameters. Using the active power and reactive power as the bifurcation parameters, single parameter Hopf bifurcation point and two parameters Hopf bifurcation boundary are calculated based on the continuation method by using the bifurcation theory with wind power system dynamic models, and the effect of parameters on Hopf bifurcation is studied, meanwhile the controlling function of static var compensator （ SVC ） on Hopf bifurcation is analyzed. The research results show that active power is limited by reactive power , SVC can delay Hopf bifurcation, increase wind power system voltage stability region.