Effect Of Exeitation Controller And Load Uncertainty On The Simulation Of Power System

The accuracy of models and parameters is the basis of simulation reliability which is directly related to safe and stable operation of power system. With features of randomness and dispersity in practice, load model brings lots of uncertainties into real system, such as approximation, algorithm error etc. At the same time, the generator model and parameters of excitation controller have a great effect on the transient stability. Because Stochastic Response Surface Method (SRSM) shows better curve fitting than recently proposed method called Probabilistic Collocation Method (PCM), this dissertation applies SRSM to analyze the effect of interaction between excitation controller and load on uncertainty of the power system dynamic response. The results of uncertainty analysis show that different system operating conditions, the model of generator and excitation system in the simulation will have a great effect on simulation results. This dissertation also initially discusses how to use SRSM in the uncertainty analysis of small disturbance response, which provides references to the further study of the uncertainty in power system.