Steam turbine adjusting valve steam distribution curve converting device based on DEH

A conversion device and steam turbine technology, applied in mechanical equipment, engine components, machines/engines, etc., can solve the problems of low reliability and efficiency, achieve the effect of reducing complicated work, meeting the requirements of online modification, and ensuring safety

Active Publication Date: 2014-04-30
GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0008] Based on this, it is necessary to provide a DEH-based steam turbine valve and steam distribution curve conversion device for the problem of low reliability and efficiency

Method used

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  • Steam turbine adjusting valve steam distribution curve converting device based on DEH
  • Steam turbine adjusting valve steam distribution curve converting device based on DEH

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Embodiment Construction

[0026] The specific implementation of the DEH-based steam turbine control steam distribution curve conversion device of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] refer to figure 1 as shown, figure 1 It is a structural schematic diagram of the steam turbine's steam distribution curve conversion device based on DEH of the present invention, including a dynamic steam distribution weight coefficient calculation circuit 10 and a steam distribution curve switching circuit 20;

[0028] The dynamic distribution weight coefficient calculation circuit 10 includes: a first signal switching module 104, a rate limiting module 105 and a first value subtraction module 106;

[0029] The first signal switching module 104 is used to output a constant value of 1 or 0 to the input terminal of the rate limiting module 105 according to the logic value of the condition pin. When the valve adopts the old steam distribution curve,...

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Abstract

The invention provides a steam turbine adjusting valve steam distribution curve converting device based on DEH. The steam turbine adjusting valve steam distribution curve converting device comprises a dynamic steam distribution weight coefficient calculating loop and an adjusting valve steam distribution curve switching loop. The dynamic steam distribution weight coefficient calculating loop comprises a first signal switching module, a speed limiting module and a first numerical value subtraction module. The adjusting valve steam distribution curve switching loop comprises a first function generator, a second function generator, a second numerical value subtraction module, a first numerical value multiplying module, a first numerical value addition module, a second numerical value multiplying module, a second numerical value addition module and a second signal switching module. The steam turbine adjusting valve steam distribution curve converting device based on DEH has the advantages tracking and no disturbance of valve instructions after switching of new and old adjusting valve steam distribution curves and at the initial switching moment are achieved, and steam turbine debugging and testing reliability are increased; complex works of engineering technicians are reduced, misoperation probability is reduced, the requirement of online adjusting valve steam distribution curve modification during steam turbine debugging can be satisfied, and the operation efficiency of steam turbine debugging and testing is increased.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a DEH-based valve steam distribution curve conversion device for a steam turbine. Background technique [0002] The steam distribution curve of the steam turbine valve directly determines the characteristics of the steam inlet mode and the inlet steam flow rate of the steam turbine. In the process of steam turbine commissioning and testing, in order to improve the vibration characteristics caused by the steam flow of the steam turbine, the bearing force distribution of the steam turbine bearing bush, and the valve command and flow characteristics, it is often necessary to modify the existing valve steam distribution curve when the steam turbine is rotating. Revise. [0003] The traditional modification method is that the control engineer directly modifies the existing steam distribution function in DEH, and adjusts slowly and in small steps according to the fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D17/10
Inventor 万文军陈世和黄卫剑李军
Owner GUANGDONG ELECTRIC POWER SCI RES INST ENERGY TECH CO LTD
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