Field Current Compensation Factor in Synchronous Generator Dynamic Model for Power System Study

This article analyzes and tests the field current compensation factor which has been used in the GENQEC generator model with proven high steady-state accuracy and good dynamic performance. Analysis on synchronous generator basic equations and second-order generator equivalent circuit provides the theoretical basis of the field current compensation factor. The concept of generator field current compensation factor based on zero power factor characteristics in the linear region of the magnetic circuits brings a new aspect for solving the century-long field current accuracy issue in synchronous generator modeling. With proven simplicity and effectiveness, the application of the field current compensation factor can be a comparable or better alternative to Potier reactance and other methods which modify the variable in saturation functions.