基于改进最小二乘法的变压器参数辨识研究

摘要

为了实现变压器绕组变形的监测，需要对变压器绕组参数进行在线辨识。分析Y／△型三相双绕组变压器参数辨识模型建立的过程，提出一种改进的最小二乘法，即利用递推阻尼最小二乘法对变压器绕组进行辨识，可以有效地避免传统递推最小二乘法存在的参数爆发现象，辨识结果更加稳定。通过Matlab／Simulink仿真计算，验证了该算法的有效性和可行性。%In order to monitor transformer winding deformation transformer winding parameters should be identified online. This paper analyzes the process of building a model for identifying parameters of Y/Δthree-phase double-winding transformers.An improved least square method is thus put forward.That is damping least square method is used to identify the transformer windings which is able to effectively avoid parameter outbreak caused by traditional method of least squares.Moreover the identification results are more stable.The simulation of Matlab/Simulink proves that this method is effective and feasible.