基于内点半定规划的同步发电机励磁控制  

Synchronous Generator's Excitation Control Based on Interior Semi-definite Programming

作　　者：卢毅 韦化[2] 石韦 

机构地区：[1]南宁供电局,广西南宁530031 [2]广西大学电气工程学院,广西南宁530004 [3]防城港供电局,广西防城港538001

出　　处：《现代电力》2009年第1期1-6,共6页Modern Electric Power

基　　金：国家自然科学基金(50467001);国家高校博士学科点专项科研基金(20060593002);广西自然科学基金(0448025;0639007)

摘　　要：在同步发电机线性数学模型的基础上,提出将内点半定规划(SDP)与线性矩阵不等式(LMI)技术引入到发电机的励磁控制,避免了线性最优励磁控制(LOEC)使用二次性能指标时需要尝试和选择权矩阵。为了验证基于内点半定规划励磁控制的有效性,以单机无穷大系统进行仿真表明:所提方法除了与LOEC方法一样能提高系统稳定极限和改善系统暂态稳定性,还能显著减少发电机端电压的稳态误差;使系统具有良好的动态响应能力,改善了整个电力系统的动态品质。By introducing the Interior Semi-definite Pro- gramming （SDP） and Linear Matrix Inequalities （LMI） to the generator＇s excitation, a new control method is proposed. Compared with the Linear Optimal Excitation Control （LOEC） which uses the quadratic performance index, this method avoids attempting and selecting weight matrices. Simulations on the single machine system show that, the proposed method can not only enhance the power system stability and improve the transient quality as well as LOEC, but also reduce the generator extremity voltage steady-state errors. The method enables the whole power system to have good dynamic response ability, and improve the dynamic performances to a great extent.

关 键 词：半定规划 线性最优控制 励磁控制 线性矩阵不等式 电力系统稳定 

分 类 号：TM31[电气工程—电机]