基于耗散理论的TCSC与励磁协调控制研究

Study on Dissipative Theory in Coordinated Control for TCSC and Generator Excitation

针对TCSC与发电机励磁的协调控制问题,研究了能够实现干扰抑制的鲁棒非线性协调控制律。首先针对一类多输入非线性系统,通过耗散不等式的递推设计,提出了一种L2增益意义下的干扰抑制方法,得到实现干扰抑制的控制律。然后考虑电力系统的强非线性和不确定性,建立了带有干扰项的TCSC与发电机励磁系统非线性模型。最后,提出了TCSC与发电机励磁的鲁棒非线性协调控制律。在单机无穷大系统情况下的仿真结果表明,提出的控制律可有效抑制干扰的影响,提高电力系统暂态稳定性。

For the problem in coordinated control of TCSC and generator excitation, a robust nonlinear coordinated control law was studied which could achieve disturbance attenuation. Firstly, for a class of multi-input nonlinear system, a disturbance attenuation method in the sense of L2 gain was proposed through recursive method to construct storage function, and then a disturbance attenuation control law was obtained. Secondly, in view of the strong nonlinearity and uncertainty of power system, the nonlinear model with disturbances was constructed. Lastly, a new robust nonlinear coordinated control law for TCSC and generator excitation was developed. Simulation results in the case of single-machine infinite-bus power system show clearly that the proposed control law can attenuate disturbances on the system and enhance transient stability of power system.