A mathematical model suitable for simulation of fast cut back of coal-fired boiler-turbine plant

Recently, blackouts have occurred frequently due to various reasons. When the fault in the power grid is repaired, fast cut back (FCB) technology can restore power quickly. Therefore, it is necessary to establish a dynamic mathematical model of thermal power plant to simulate FCB. In this paper, a dynamic mathematical model of 300 MW thermal power plant was built up, which was based on the principles of mass and energy balance. The model considered feed water heater systems, bypass system, and feed water pumps. The heat absorption characteristics of steam-water systems during FCB were considered as well. This model has been verified by the FCB field tests under the conditions of 50% and 100% economize continue rate (ECR) load.