DAMPING AND SYNCHRONIZING TORQUES OF SALIENT POLE GENERATORS WITH ACCURATE REPRESENTATION OF SATURATION

The paper presents an accurate evaluation to the damping and synchroni zing torques of a saturated salient pole generator. This objective is achieved by improving the accuracy of saturation representation and th e method of computing damping and synchronizing torques. The alternato r is represented by using a detailed circuit model which incorporates, properly, the saturation effects under steady-state and dynamic condi tions. Based on this detailed model, the damping and synchronizing tor que coefficients have been calculated by a least square algorithm whic h is unrestricted to the degree of complexity of the system. To genera lize the conclusion, the damping and synchronizing torque coefficients have been calculated over a wide range of operating conditions. Furth ermore, the effect of saturation on the operating boundaries is also e xhibited.