一种单相并网逆变器参数在线估计方法  

An Online Parameter Estimation Method for a Single-phase Grid-tied Inverter

作　　者：周小杰[1] 王超 李平[1] ZHOU Xiaojie;WANG Chao;LI Ping(School of Electrical and Information Engineering,Anhui University of Science and Technology,Huainan 232001,Anhui,China)

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电气传动》2018年第8期13-16,共4页Electric Drive

基　　金：安徽省教育厅自然科学基金资助重点项目(KJ2016A193;KJ2016A194)

摘　　要：单相并网逆变器广泛地应用于新能源发电和储能装置中,其控制效果的优劣直接关系到并网的性能。要获得较好的控制效果依赖于精确的数学模型。逆变器的数学模型与系统的参数有关(等效损耗电阻、滤波电感),这些参数在逆变器运行过程中并不是固定不变的。采用基于瞬时功率的模型参考自适应控制方法在线估计系统参数,从而获得精确的数学模型。最后,实验结果证明了该方法在线估计系统参数的正确性和有效性。Single-phase grid-tied inverters are widely used in new energy power generation and energy storage devices.The control performance of single-phase grid-tied inverter is directly related to the technical indexes of grid.Obtaining better control effect depends on accurate mathematical model of single-phase grid-tied inverter.The plant model depends on the system parameters(equivalent loss resistance,filter inductance)which are not fixed.Model reference adaptive control(MRAC)based on instantaneous power was proposed to estimate the system parameters for accurate plant modeling.Experimental results verify the correctness and validity of the method.

关 键 词：单相并网逆变器 参数在线估计 模型参考自适应控制 瞬时功率 

分 类 号：TM315[电气工程—电机]