Prediction of Dynamic Voltages During Plant Startup by Computer Techniques

A gas-turbine package power plant was used to provide startup power for a 250-MW steam-generating unit. Performance of the excitation system during startup of large power-station auxiliary motors closely matched that previously calculated by a digital-computer program. Results of the computer study and full- scale verification tests are presented. These results verified that the digital-computer program used accurately simulated the dynamic characteristics of the excitation system, generator, and motor. Based on this verification, it was concluded that further computer studies could be utilized with confidence to predict voltage dips at critical locations in the power system.