基于L-M法的电力系统非线性参数辨识方法研究  

Research on Power System Nonlinear Parameter Identification Method Based on L-M Method

作　　者：李凌飞 李慧敏[2] 刘颂凯[2] 

机构地区：[1]南方电网科学研究院,广州510080 [2]武汉大学电气工程学院,武汉430072

出　　处：《广西电力》2012年第6期1-6,共6页Guangxi Electric Power

基　　金：国家自然科学基金资助(61074101;50477018;51007093);高等学校博士学科点专项科研基金(20090141120062)

摘　　要：现代电力系统的实时控制等方面对系统参数的精确性要求较高。针对电力系统非线性参数辨识问题,将非线性反问题的正则化研究方法L-M法引入电力系统参数辨识。L-M法可以看作是对非线性问题先作线性化后正则化的过程,具有很好的鲁棒性。通过在仿真中设置多个测试场景研究表明,该方法能够有效地对发电机参数进行辨识,和其它算法相比,有效提高了辨识精度,而且对初始点不敏感,具有克服迭代矩阵病态或奇异的能力。Higher requirement for the accuracy degree of system parameters is needed in the real-time stability control of modem power system. In order to solve the power system nonlinear parameter identification problem, the L-M method is involved which is usually used in the study of inverse problem of nonlinearity. The L-M method can be regarded as a linearization and normalization process to the nonlinear problem which has excellent robustness. Simulation studies based on multi-scene tests show that the proposed method can effectively identify generator parameters and improve the identification accuracy comparing with other algorithms, and it is not sensitive to the initial point and has the ability of overcoming morbidity or singularity of iteration matrix.

关 键 词：电力系统 非线性 参数辨识 L-M法 

分 类 号：TM71[电气工程—电力系统及自动化]