多机电力系统TCSC改进自适应backstepping滑模控制

Improved Adaptive backstepping Sliding Mode Control for Multi-Machine Power System TCSC

针对含TCSC的两区域互联电力系统,将其等值为两机系统,采用改进backstepping方法、自适应控制以及滑模控制,设计了一种全新的非线性鲁棒控制器。在设计阻尼系数的参数替换律时,采用浸入和不变自适应控制,突破了确定性—等价性原理。将虚拟控制变量的导数看作不确定项,采用滑模控制补偿其不确定性,解决了backstepping方法的＂系数膨胀＂问题。而且,在设计中,未对系统的数学模型采用线性化方法,使系统的非线性得以保留。最后,仿真结果表明,所设计的控制器明显提高了输电系统的暂态稳定性。

According to the two-area interconnected power system with TCSC, a new nonlinear robust controller is designed by using the improved backstepping method, adaptive control and sliding mode control, which is equivalent to the two machine system. When designing the parameter substitution law of damping coefficient, the immersion and invariance adaptive control that breaks the certainty equivalence principle is adopted. The derivative of the virtual control is seen as the uncertainty item. For the sake of avoiding the ＂explosion of terms＂ of backstepping method, the sliding mode is used to compensate the uncertainty. The mathematic model of the system does not use the linearization method, so that the nonlinear is kept. Finally, the simulation results show that the controller significantly improves the transient stability of the transmission system.