Frequency Domain Analysis of Low-Frequency Oscillations in Large Electric Power Systems. Interim Report. Applications of a Small-Scale Computer Program

摘要

Mathematical models and computing methods for determining the natural freqencies and damping of generator rotor oscillations in large electric power systems are described. These models and methods provide the basis for estimating those eigenvalues most intimately related to rotor motion. The principal computational problem is the calculation of incremental voltage oscillations in a linear system model subjected to an external forcing function. This linear system model is derived from networks and generator representations employed in conventional time domain stability calculations. Methods of calculating voltages using this model are discussed. The use of these voltages in an iterative process to estimate eigenvalues is explained. (ERA citation 03:042649)