Armal power generation unit main steam pressure optimization control method

Abstract

The invention discloses a thermal generator set main steam pressure optimization control method which comprises the following steps: calculating a main steam pressure deviation signal and a load deviation signal of a target thermal generator set; respectively judging the demands of load deviation and main steam pressure deviation for fuel increase / decrease, and adjusting control parameters of a PID (proportional-integral-derivative) controller; if the two demands are identical, adjusting the control parameters of the PID controller to enhance the adjustment action of the PID controller on the amount of fuel entering the boiler; if the two demands are different, adjusting the control parameters of the PID controller to reduce the adjustment action of the PID controller on the amount of fuel entering the boiler; and adjusting the amount of fuel entering the boiler by using the PID controller according to the output amount obtained by PID calculation on the basis of the main steam pressure deviation signal. The method can enable the thermal generator set to quickly respond to the network load demand when the network load demand changes, can also prevent the main steam pressure deviation from overranging and keep the boiler combustion stable, and enhances the load response property and operation stability of the thermal generator set.

Description

technical field [0001] The invention relates to the control engineering technology of a thermal power generating set, in particular to a method for optimizing the main steam pressure of a thermal generating set. Background technique [0002] With the continuous operation of UHV transmission lines and the widespread application of new energy sources such as wind power and solar energy, the structure of the power grid has become increasingly complex. In order to ensure the quality of electric energy and the full utilization of clean energy, the power grid dispatching system requires thermal power generating units to have fast load response performance and regulation performance, and deeply participate in power grid peak regulation and frequency regulation. The steam turbine is a fast-response object, while the boiler combustion process has a large lag, and the contradiction between the rapidity of the steam turbine's load adjustment and the lag of the boiler combustion process...

AI Technical Summary

Problems solved by technology

When the load demand of the unit changes, it is easy for the main steam pressure adjustment and the unit load demand to mismatch or even contradict each other, causing the deviation of the main steam pressure to exceed the limit, affecting the combustion stability of the boiler and the load response performance of the unit

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