CAJ | 학술논문

在电力系统中装设可控串联补偿(TCSC)可以改善系统的稳定性,抑制次同步谐振和区域问的低频振荡,提高远距离联络线的传输能力.为更好地发挥TCSC效益,利用模糊T-S模型无限逼近非线性系统的特性,提出了一种多目标TCSC控制器设计方法.建立了一类含TCSC的两机电力系统的模糊T-S模型,把闭环系统的稳定性、H_∞性能、极点配置的要求统一到一个线性矩阵不等式组中,基于线性矩阵不等式理论实现了TCSC多目标控制器设计,采用并行分配补偿技术,设计出了全局非线性系统的控制规律.最后,利用MATLAB进行了仿真,结果表明所设计的控制器能有效提高电力系统的功角稳定性,保证系统具有良好的动态性能,能满足多个目标要求,具有比TCSC非线性H_∞鲁棒控制器更优越的性能,且易于工程实现,它将会在电力系统稳定控制中得到更多应用.
재전력계통중장설가공천련보상(TCSC)가이개선계통적은정성,억제차동보해진화구역문적저빈진탕,제고원거리련락선적전수능력.위경호지발휘TCSC효익,이용모호T-S모형무한핍근비선성계통적특성,제출료일충다목표TCSC공제기설계방법.건립료일류함TCSC적량궤전력계통적모호T-S모형,파폐배계통적은정성、H_∞성능、겁점배치적요구통일도일개선성구진불등식조중,기우선성구진불등식이론실현료TCSC다목표공제기설계,채용병행분배보상기술,설계출료전국비선성계통적공제규률.최후,이용MATLAB진행료방진,결과표명소설계적공제기능유효제고전력계통적공각은정성,보증계통구유량호적동태성능,능만족다개목표요구,구유비TCSC비선성H_∞로봉공제기경우월적성능,차역우공정실현,타장회재전력계통은정공제중득도경다응용.
Thyristor controlled series compensation (TCSC) is expected to be applied in transmission systems to a-chieve much benefit such as improving transient stability and dynamic performance of power systems, damping sub-synchronous resonance (SSR) and inter-area oscillation, and enhancing the power transfer capability of long inter-connected transmission lines.A multi-objective controller is presented to ensure the performance of this device based on fuzzy T-S model which is infinitely approximate to nonlinear system.The T-S fuzzy model for a two-machine sys-tem with TCSC is given.Stable conditions of close-loop T-S fuzzy system, H_∞ performance and polo assignment are combined into a framework of LMIs, and the parameters of TCSC controller can be obtained by convex programming techniques for LMIs.The fuzzy state feedback nonlinear controller based on LMI for the overall system is obtained via parallel-distributed compensation (PDC) approaches.It can be seen from the MATLAB simulations that the con-troller can improve stability of power system, ensure good dynamic performance and satisfy multi-objective require-ments of desired control performance.The designed controller is superior to nonlinear H_∞ robust controller, and is easier to realize in engineering.There will be more applications in power system stable control.