汽轮发电机非线性协调滑模稳定控制

Stabilty control with nonlinear coordinated sliding mode for steam-turbine generators

汽轮发电机的励磁系统、汽门控制系统以及灵活交流输电系统(FACTS)的成员对电力系统的稳定性有很大的影响.针对含有FACTS(TCSC/SVC)的单机无穷大输电系统提出一种新型的励磁、汽门和FACTS的协调控制器,从而提高了电力系统的稳定性.在反馈线性化理论的基础上,该协调控制器对包含可控串联补偿(TCSC)、静止无功补偿(SVC)、励磁和汽门控制的多输入多输出系统非线性数学模型,进行反馈线性化;然后,对于线性化后的伪线性系统,采用滑模变结构控制,得到一个最终的非线性滑模协调控制器.仿真结果表明:在基于非线性滑模控制的FACTS、励磁和汽门的新型协调控制器作用下,电力系统具有更好的动态响应和更强鲁棒性.

The stability of power system is greatly influenced by the operation of excitation system、steam valving control system and FACTS controllers（such as： TCSC/SVC）.In order to improve the stability of power system,a novel coordinated conroller used in a single machine infinite system is proposed for Steam-turbine Generator excitation、steam valving and FACTS（TCSC/SVC） in this paper The muti-output and input nonlinear mathematic modeling,which includes nonlinear FACTS,SVC,excitation and steam valving,is exactly linearized via state feedback.And the quasi-linearized system is controlled by sliding model control mathod.Simulation results show that the novel coordinated controller gives better dynamic response and stronger robustness.