Comparison of models for predicting disturbances caused by induction motor starting

When starting induction motors directly on line, various system disturbances occur like voltage dips, inrush currents and low lagging power factor. To counteract these disturbances, series and shunt capacitors are sometimes added but they, in turn, may adversely affect motor operation and generate harmonics into the power system. This paper uses different mathematical models for the induction machine to analyse these problems and the results of several case studies are included.