摘要
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间的低频振荡,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。
Thyristor controlled series compensation（TCSC） is expected to be applied in transmission systems to achieve much benefit such as improving transient stability and dynamic performance of power systems,damping subsynchronous resonance（SSR） and inter-area oscillation,and enhancing the power transfer capability of long interconnected 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 system 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 controller can improve stability of power system,ensure good dynamic performance and satisfy multi-objective requirements 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.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第2期537-541,共5页
High Voltage Engineering
基金
南京理工大学科研发展基金(XKF07006)~~
