Unit plant coordinative control method and system

A technology of coordinated control systems and unit units, applied in mechanical equipment, steam engine devices, machines/engines, etc., can solve problems such as large deviation of main steam pressure control

Active Publication Date: 2015-12-02
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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Problems solved by technology

[0005] Based on this, it is necessary to provide a coordinated control method and system for unit units to address the problem of large de

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  • Unit plant coordinative control method and system
  • Unit plant coordinative control method and system
  • Unit plant coordinative control method and system

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Embodiment Construction

[0023] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings.

[0024] The present invention can be realized by programming on DCS (Distributed Control System, decentralized control system), PLC (Programmable Logic Controller, programmable logic controller), single-chip microcomputer or computer. In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below according to the drawings and embodiments. It should be understood that the specific implementations described here are only used to explain the present invention, not to limit the present invention.

[0025] attached figure 1 It is a typical traditional CCS system control schematic diagram. The unit load command MWD passes through a sliding pressure curve function f 1 (x) to get the theoretical target pressure setting value TP S1 , and then superimpo...

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Abstract

The invention relates to a unit plant coordinative control method and system. The method includes the steps of calculating the main steam pressure control deviation of the unit plant coordinative control system according to a main steam pressure set value and an actual main steam pressure value at the inlet of a boiler main control pressure PID adjustor, setting the first change direction, obtained after a first delay link, of the main steam pressure set value according to the difference value between an original main steam pressure set value and the main steam pressure set value obtained after the delay link, setting the second change direction, obtained after a second delay link, of a plant load instruction according to the difference value between an original plant load instruction and the unit load instruction obtained after the delay link, and online adjusting the delay time of the plant load instruction and the delay time of the main steam pressure set value according to the main steam pressure control deviation, the first change direction and the second change direction.

Description

technical field [0001] The invention relates to the technical field of thermal power generating set control, in particular to a coordinated control method and system for unitary generating sets. Background technique [0002] A large thermal power unit unit is a composite object, and the controlled process is a multi-input and multi-output process. The main characteristics of the boiler are that the boiler is a relatively slow response process with large thermal inertia, while the steam turbine is a relatively fast response process. In the response process, the thermal inertia is much smaller than that of the boiler. In the unit unit coordinated control system (Coordinated Control System, CCS) design, in order to improve the stability of the main steam pressure and reduce the control deviation of the main steam pressure in the process of changing loads, it is usually designed with a delay action of the steam turbine adjustment (usually through the unit Load command delay) an...

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Application Information

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IPC IPC(8): F01K13/02
Inventor 朱亚清张曦黄卫剑刘哲陈世和潘凤萍
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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