凸极式发电机励磁与非理想STATCOM的协调控制

Coordinated Control of Salient-Pole Excitation and Non-Ideal STATCOM

传统的含STATCOM的电力系统控制方法均采用STATCOM理想模型,即假定接入点的电压与电流相位差恒为90度,而在实际运行中根据不同的工况此角度可为任意值。考虑非理想STATCOM和凸极式发电机模型,首先建立了系统具有代数约束的非线性模型,分析STATCOM接入点的电压与电流相位差为任意角时控制情况的复杂性;进而利用几何反馈线性化理论并结合经典的线性二次型最优控制方法,给出了凸极式发电机励磁与STATCOM装置的协调控制设计方法;最后用一仿真算例验证了所提出方法的正确性和有效性。

By establishing the nonlinear system model with algebraic constraint equations of one salient-pole generator and STATCOM, the detail control method of the excitation and STATCOM devices is designed by using geometric feedback linearization control theory combined with classical linear quadratic optimal control method. This paper analyzes the complexity of controlling when the phase difference of the point voltage and current where STATCOM is accessed is at arbitrary instead of the ideal state. The method of design broads the application range of geometric linear theory used in differentialalgebraic systems, and improves the practicality of coordinated control of excitation and STATCOM.