基于史密斯预估器的互联电网区间阻尼控制  

Damping Control of Interconnected Power System Based on Smith Predictor

作　　者：王伟岸[1] 王俊[1] 蔡兴国[1] 

机构地区：[1]哈尔滨工业大学电气工程系,黑龙江省哈尔滨市150001

出　　处：《电力系统自动化》2008年第20期37-41,共5页Automation of Electric Power Systems

基　　金：高等学校博士学科点专项科研基金资助项目(20050213006);黑龙江省科技攻关项目(GD07A304)~~

摘　　要：针对广域信号存在时延的问题,提出一种基于史密斯预估器的附加励磁控制器设计方法。该方法在设计阶段采用统一史密斯预估器消除时滞对控制系统的影响,附加励磁控制器的设计采用标准H∞混合灵敏度方法,通过求解具有闭环区域极点约束的线性矩阵不等式得到控制器参数。基于该方法设计的控制器被用于2区域电力系统进行仿真,结果表明,即使在广域反馈信号发生时滞的情况下,该附加励磁控制器仍能有效提高电力系统区间振荡模式的阻尼,具有很强的鲁棒性。There is an unavoidable time-delay involved when wide area signals are transmitted through a long distance. To solve this problem, based upon unified Smith predictor （USP）, a novel method for the additional excitation controller designing is presented. This method eliminates the impact of time-delay by using USP at design stage. The standard H∞ mixed sensitivity approach, which is derived by solving linear matrix inequalities with additional pole-placement constraints, is employed to design the damping controller. The predictor based method proposed is applied for the damping controller design for a two-area power system. Simulation results show that controller could improve the damping ratio of inter-area mode effectively, even though the feedback signals arrive at the controller site after a finite time-delay.

关 键 词：低频振荡 附加励磁控制 线性矩阵不等式 时滞系统 史密斯预估器 

分 类 号：TM712[电气工程—电力系统及自动化] TM761