Phase-domain synchronous generator model for transients simulation

• Main Author: Louie, Kwok Wai
• Format: Others
• Language: English
• Published: 2009
• Online Access: http://hdl.handle.net/2429/3666

Three-phase synchronous generators which convert mechanical energy into electrical energy are the main power sources of power systems. In this thesis a phase-domain synchronous generator model which is developed directly in the stator reference frame is presented. The electrical and mechanical parts of a three-phase synchronous generator are separately modeled by two different, sets of differential equations which are discretized with the trapezoidal rule of integration. These two parts are linked together by the rotor position angle and the electromagnetic torque generated by the interactions of the different magnetic fields, resulting in a linear generator model. In order to represent the generator more accurately, the linear generator model is modified to include magnetic saturation effects, resulting in a non-linear generator model. A formula is developed to account for the saturation as a function of the rotor angle and the total magnetomotive force angle. The machine parameters in the stator reference frame are obtained from the given characteristic quantities by a suitable data conversion scheme. To verify the linear generator model, a comparison between the simulation results of a three-phase short-circuit at the terminals of the machine obtained with the new linear model and the model in the EMTP is conducted. === Applied Science, Faculty of === Electrical and Computer Engineering, Department of === Graduate