含静止同步补偿器的风电系统多参数鞍结分岔边界追踪及分析

Tracking and Analysis of Multi-Parameter Saddle-Node Bifurcation Boundary of Wind Power System Containing Static Synchronous Compensator

静止同步补偿器(static synchronous compensator,STATCOM)能有效提高风电系统的电压稳定性。利用分岔理论,以风电注入有功功率、STATCOM的交流侧及直流侧电压增益为控制参数,追踪风电系统节点电压多参数鞍结分岔边界,分析多参数共同作用下影响风电系统电压稳定性的规律,提出了以二次多项式作为鞍结分岔边界的近似解析表达式的方法,为解决3参数以上的鞍结分岔边界的追踪问题提供参考。

Voltage stability is of significance problem to wind power generation system and static synchronous compensator （STATCOM） can effectively improve voltage stability of wind power generation system. Using bifurcation theory and taking the active power injected by wind power generation system and the voltage gains at AC and DC sides of STATCOM as control parameters, the multi parameter saddle-node bif^arcation boundary of wind power generation system is traced; the regularity that impacts voltage stability of wind power generation system under combined action of multi parameters is analYzed; and to trace saddle-node bifurcation boundary with more than three parameters, a method which takes quadratic polynomial as approximate nonlinear analytic expression of saddle node bifurcation boundary is proposed.