Power plant mother pipe coordination control and polling recursive distribution method

Abstract

A power plant mother pipe coordination control and polling recursive distribution method belongs to the technical field of power system automatic control, and comprises the following steps: step S01, calculating the relationship between the power load and the steam load of a unit, and converting the variable of the generating capacity into the variable of the steam flow; s02, calculating the relationship between the steam pressure of the main pipe and the steam pressure of the boiler; step S03, performing polling recursion distribution on mother pipe parameters, and distributing the variable quantity into a boiler system; and S04, boiler parameters are distributed, and the boiler parameters are distributed into a boiler combustion control system. The method comprises the steps of calculation of the relation between unit electrical load and steam load, calculation of the relation between mother pipe steam pressure and boiler steam pressure, mother pipe parameter distribution and boiler parameter distribution. The distribution method adopts a polling recursive distribution method. According to the invention, the coupling problem of combustion control systems among boilers produced by a header system power plant, the following control problem of the boilers during the load change of a steam turbine and the automatic control problem of header pipe pressure can be solved.

Description

technical field [0001] The invention belongs to the technical field of automatic control of electric power systems, and in particular relates to a coordinated control method for main pipes of power plants. Background technique [0002] Thermal power generation is the main way of power supply in my country. According to the way the boiler produces steam to supply the steam turbine, it is divided into unit system production and parent control production. Unit system production means that steam produced by one boiler is only supplied to a corresponding steam turbine, while main control production means that the steam produced by multiple boilers is sent to the same steam main pipe, and multiple turbines obtain steam from the main pipe. For master control production, host or boiler failure can be directly removed, so it has higher stability and safety. However, since all steam turbines and boilers are connected in parallel to the same main pipe, there is a strong coupling betwe...

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Problems solved by technology

However, since all steam turbines and boilers are connected in parallel to the same main pipe, there is a strong coupling between boilers, between steam turbines, and between boilers and steam turbines, so there is mutual influence on the combustion control system between boilers in the production control of the main pipe. , When the steam turbine load changes, the boiler follow-up control problem and the main pipe pressure automatic control problem, when the production process fluctuates or the production load changes, a reasonable distribution is required to make the production process more stable

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