Coordination control method and system for rapid peak-load shaving of thermal power generating unit

Abstract

The invention discloses a coordination control method and system for rapid peak-load shaving of a thermal power generating unit. An improved DEB boiler load command is adopted in the coordination control system of the thermal power generating unit for ensuring that the main vapor pressure control deviation is low when the load of the thermal power generating unit is changed in the peak-load shaving, the boiler can be rapidly adaptive to the output of a steam engine when the load of the thermal power generating unit is changed; a calculation method for the set value of the main vapor pressure of the thermal power generating unit is provided in order to stagger forward overlaying of dynamic compensation parts of the boiler command when the load is changed rapidly, and prevent the changing rate of the boiler command from exceeding an acceptable range of the thermal power generating unit. By adopting the coordination control method, load control rapidness and stability of the running working condition of the thermal power generating unit can be improved extremely; an effective solution is provided for a power grid to improve on the load control rapidness and stability of the unit scheduling, meanwhile, a powerful support is provided for the improvement of the AGC and primary frequency modulation evaluation index of a power plant, so that the method and system have important significance for improving the admission performance of new energy sources.

Description

technical field [0001] The invention relates to the technical field of thermal automatic control of thermal power plants, in particular to a coordinated control method and system for rapid peak regulation of thermal power units. Background technique [0002] Peak shaving is an important means for the power grid company to maintain the stability of the power grid frequency. Because the power load in the power supply area is uneven, the power grid is often overloaded during the peak power consumption. For power quality, the power grid company requires thermal power generating units to have the function of frequency modulation and peak regulation. The thermal power generation unit includes a steam turbine and a boiler. The thermal power unit coordination control system is the highest-level controller in the thermal power unit control. It is responsible for coordinating the energy balance control between the steam turbine and the boiler, and ensuring the regulation quality of th...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a coordinated control method and system for rapid peak regulation of thermal power units to solve the problem that the existing coordinated control system performs load scheduling control due to the complexity of the process of load scheduling control and the large inertia and hysteresis of the boiler itself. , resulting in slow load changes of thermal power units, unable to meet the needs of rapid peak regulation

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