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This paper builds a reasonable and brief system model, which can be used for the power system stability simulation. This system model consists of the mathematical models of power units, their sub-control systems, the load and grid. Moreover, this paper established two Coordinated Control System (CCS) models with different logical configuration of the actual CCS and connected these CCS models to the...
Classic linear models of fossil fired steam units have been used for decades in power system dynamic analyses. The effect of main steam pressure is often ignored or the more complex models of boiler and its control systems should be adopted in the simulations. Moreover, the variations of turbine enthalpy drop are not considered in those models, which may result in a great deviation of output power...
Many researches have focused on the stability analysis of power systems based on frequency response models. A constant gain value is often used to represent a governing system of a prime mover, which may be proper for a classic hydraulic governor but not suitable for modern digital electro-hydraulic (DEH) control systems. PID controllers, pressure or load feedbacks, frequency deviation feed-forwards...
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