Unit plant coordination control method and system

A unit unit, coordinated control technology, applied in the field of electric power, can solve the problems of large fluctuations in operating parameters, and achieve the effects of reducing fluctuations, improving control accuracy, and improving stability

Active Publication Date: 2015-12-23
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Based on this, it is necessary to provide a coordinated control method and system for unit units to solve the problem of large fluctuations in operating parameters in conventional CCS systems under variable load conditions with high load change rates.

Method used

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  • Unit plant coordination control method and system
  • Unit plant coordination control method and system
  • Unit plant coordination control method and system

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Experimental program
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Embodiment 1

[0104] In addition, the present invention also provides a coordinated control system for unit units, figure 2 It is a schematic diagram of the system structure of Embodiment 1 of the unit unit coordinated control system of the present invention; figure 2 As shown, Embodiment 1 of the coordinated control system of unit units includes a load change rate correction unit 110 and a BIR signal generation unit 120 connected to the CCS system;

[0105] The load change rate correction unit 110 is used to process the set value of the main steam pressure and the actual main steam pressure value to obtain the control deviation of the main steam pressure; and process the unit load command value after the speed limit and the actual unit load value, Obtain the load control deviation; and use it to determine the load change rate correction coefficient according to the main steam pressure control deviation and the load control deviation; and to correct the load change rate setting value in r...

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Abstract

The invention relates to a unit plant coordination control method and a system, wherein the method comprises the steps of: subtracting an actual main steam pressure value by a main steam pressure set value to obtain a main steam pressure control deviation; subtracting an actual plant load value by a speed-limited plant load command value to obtain a load control deviation; determining a load change rate correction coefficient according to the main steam pressure control deviation and the load control deviation; and keeping a boiler dynamic acceleration signal invariable, and correcting the load change rate set value in real time according to the load change rate correction coefficient. The method can reduce the fluctuation amplitude of plant operation parameters to improve the adjusting quality of a CCS system under various operation working conditions so as to achieve the purpose of safe and economical plant operation.

Description

technical field [0001] The invention relates to the field of electric power technology, in particular to a method and system for coordinated control of unit units. Background technique [0002] Unit unit coordinated control system (Coordinated Control System, CCS), referred to as the coordinated control system, is to comprehensively control the boiler and steam turbine as a unit unit, and its control quality is directly related to the safety and economic operation of the unit. In the conventional CCS system design, the load change rate of the unit is a fixed value set manually. When the load changes, the load command transitions to the target value at a fixed rate. [0003] In order to meet the requirements of Automatic Generation Control (AGC) for the rapid load change of the unit, the load change rate of the unit is often set relatively high, such as 1.5-3.0% Pe / min (rated load / minute). In the process of implementation, the inventors found that there are at least the foll...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B35/00F01K13/02
Inventor 朱亚清张曦黄卫剑刘哲陈世和潘凤萍
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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