Online Identification of Damping and Synchronizing Torque of Synchronous Generator

Large number of researches are done about damping and synchronizing torque of synchronous generator. However, these researches require accurate model and data of the power system. Therefore when unexpected changes occur in the power system, damping and synchronizing torque derived from these researches become inaccurate. Loss of data will also rises same problems. Online monitoring of damping and synchronizing torque is worth to do to avoid situation mentioned above especially in the large scale power system. Online monitoring technique is also useful for autonomous controls of the power system apparatuses. In this paper, discrete type algorithms to identify synchronizing and damping power of generator in the power system using least mean square error method are presented. Easily observable data, rotor frequency and active power output of generator, are used as input data for identification to avoid difficulty to adapt the algorithms to the generator in use. Experiments using microcomputer and micromachine power system is taken to show the validity of algorithm. Result of simulation and experiments using one generator and finite bus power system show validity of algorithm and feasibility to install actual system.