作　　者： ; ; ; ;

机构地区： 郑州轻工业学院电气信息工程学院

出　　处： 《电力自动化设备》 2009年第6期67-70,共4页

摘　　要： 为了进一步提高多运行方式下大系统稳定计算的效率,在概率条件下对大系统特定模式进行降阶计算,并对降阶后模型进行了应用研究。在单方式大系统特定模式降阶计算工作的基础上,将概率方法引入到特定模式降阶研究中,依据特征值灵敏度对系统状态矩阵进行重新排序,仅保留与特定模式强相关的发电机组,使状态矩阵维数得以降低,得到降阶后模型。由于降阶后状态矩阵一般为复数形式,把矩阵虚部作为实部的修正量,以实部的特定特征值作为初值,采用改进Rayleigh商逆迭代法对降阶后矩阵进行迭代计算。在一16机系统上进行试算分析,结果显示概率情况下的降阶模型基本反映了多种运行方式下对应特征值的变化趋势,表明了该方法的可行性。 In order to improve the efficiency of power system stability calculation,the order reduction based on probabilistic condition is presented for the special modes of large power system and the application research of order-reduced model is carried out. Based on the order- reduction calculation for the special modes of large power system under single operating condition,the probabilistic method is introduced to order reduction research. The state matrix is rearranged by eigenvalue sensitivities and only the generators strongly correlated with the special mode are reserved to reduce the order of state matrix and establish the order-reduced model. Since the order-reduced state matrix is usually in complex form, the imaginary part is regarded as the correction of real part. With the special eigenvalue of the real part as the initial value ,the improved Rayleigh quotient inverse iteration is carried out for the order -reduced state matrix. The proposed approach is tested for a 16- machine power system and results show that the reduced model reflects the variation tendency of eigenvalues corresponding to different operation modes ,which verifies its feasibility.

关 键 词： 电力系统 降阶 概率条件 特征值灵敏度 机电模式 商逆迭代

领　　域： [电气工程]