【摘要】 针对IEEESSR第一基准模型 ,应用Hopf分岔理论 ,分析了系统的分岔现象。结果表明 ,随着串联补偿电容的增加 ,电气振荡模式与相应的扭振模式的相交 ,只意味着与扭振模式对应的SSR不稳定振荡最有可能发生 ,但不意味着Hopf分岔和SSR的不稳定振荡一定发生。时域仿真表明SSR的不稳定振荡区域比特征值分析法所预测的不稳定振荡范围稍小更多还原

【Abstract】 A bifurcation analysis is used to investigate the stability of SSR for the IEEE first benchmark model.The results show that,as the compensation level increases,the system will lose its stability once a pair of complex conjugate eigenvalues of the jacobian matrix crosses the imaginary axes from the left to the right half of the complex plane.This corresponds to a Hopf bifurcation.The most significant contribution of this paper is that the subsynchronous electrical mode crosses with the torsional modes will most probably but not necessary induce the occurrence of unstable SSR.Time domain simulation results show that the region of unstable SSR is smaller than that determined by the eigenvalue analysis.更多还原