TCIPC提高系统稳定性的逆系统方法最优控制

摘要

可控相间功率控制器(TCIPC)对电力系统潮流控制,提高线路输送能力具有一定的作用,在研究可控相间功率控制器(TCIPC)基本原理的基础上,分析了电感、电容支路对带TCIPC联络线传输功率的控制特性,进行了TCIPC提高系统暂态稳定性的机理分析.基于逆系统方法,将含调谐型TCIPC的非线性电力系统线性化,构造出一个伪线性系统,并且依据线性二次型调节器(LQR)最优控制理论推导出TCIPC的非线性控制规律.搭建了带调谐型TCIPC的单机无穷大系统简化模型进行仿真.仿真结果验证了采用逆系统方法设计的控制策略可以在系统发生大干扰后具有良好的控制性能,能够达到提高电力系统暂态稳定性的作用.%Thyristor controlled interphase power controller (TCIPC) has certain effects to control the flow of power system and improve the transmission capacity of transmission line.On the basis of researching the basic principle of TCIPC, this paper analyzed the controlling characteristics of the link transmission power with TCIPC which were impacted by the inductor and capacitor branch.The mechanism analysis of TCIPC to improve the stability of the system was also carried out.The nonlinear power system containing tuning TCIPC was made linearization to construct a pseudo linear system by adopting the inverse system method.And the linear quadratic regulator (LQR) optimal control theory was utilized to this system to design the TCIPC nonlinear controller.The simplified model of a single machine infinite bus system with tuned TCIPC was built to emulate.The simulation results show that the control strategy designed by inverse system method has a good performance and can improve transient stability of power system when the big interference happens in the system.