感应电动机负荷模型参数解析灵敏度分析及参数辨识策略研究

ANALYSIS ON PARAMETER ANALYTIC SENSITIVITY OF INDUCTION MOTOR LOAD MODELAND PARAMETER IDENTIFICATION STRATEGY

通过对感应电动机参数的解析灵敏度分析,较好地解释了感应电动机负荷模型中部分参数易辨识,部分参数难以辨识且辨识结果较离散这一现象。研究结果表明:灵敏度大的参数易辨识,灵敏度小的参数难辨识,且辨识结果较离散;在不同的激励强度下,感应电动机负荷模型各参数灵敏度将随激励的增强而增大。文中提出了一种新的感应电动机负荷模型参数辨识策略。经现场实测数据建模,验证了该辨识策略的有效性及可行性。

By means of the analysis on parameter analytic sensitivity of induction motor load model the phenomenon that a portion of its parameters is easy to identify and another portion of its parameters is difficult to identify and the identification results are discrete is solved. The research result shows that the parameters with high sensitivity are easy to identify while the parameters with low sensitivity are difficult to identify. Here, a brand-new parameter identification strategy for induction motor load model is put forward, and the effectiveness and feasibility of the proposed identification strategy is verified by a practical modeling example based on the on-site measured data.