Valve flow function optimization method based on unit operation data

A valve flow and operating data technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of inability to optimize the effect judgment, affecting the accuracy of the test, difficult test results, etc., to reduce the optimization time, avoid Calculate the error and improve the effect of optimization efficiency

Inactive Publication Date: 2014-12-10
STATE GRID CORP OF CHINA +2
View PDF6 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the optimization method based on the valve flow characteristic test has the following deficiencies: 1. The test time is long, sufficient test data needs to be tested under enough working conditions; 2. The test accuracy is affected by the fluctuation of the main parameters of the unit, and the test requirements The main steam pressure is stable, and the absolute stability of the main steam pressure is impossible, and the fluctuation of the main steam pressure will eventually affect the accuracy of the test; 3. It is difficult to directly confirm the test effect. At present, the confirmation of the test effect is based on whether the system control performance is improved. It is still impossible to judge the optimization effect intuitively

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Valve flow function optimization method based on unit operation data
  • Valve flow function optimization method based on unit operation data
  • Valve flow function optimization method based on unit operation data

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] This embodiment is a valve flow function optimization method for a total of 6 high-pressure regulating valves in a unit.

[0031] Firstly, according to the operation data processing of the unit, the actual valve flow characteristic curve should be obtained, which is divided into three steps:

[0032] (1.1) Using the historical record power of the distributed control system of the thermal power unit or the digital electro-hydraulic system, the regulating stage pressure, the main steam pressure, and the flow command f used for the optimization of the valve flow function are collected on the history server 2 , power and other operating data.

[0033] (1.2) Use the operating data obtained in (1.1) to calculate the theoretical steam flow Q entering the steam turbine, at this time ; and convert the theoretical steam flow into a percentage form, the theoretical steam flow percentage , where is the rated theoretical steam flow, and its value is based on the flow instructi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a valve flow function optimization method based on unit operation data. According to the method, operation data of a thermal power generating unit is processed to obtain actual valve flow performance data of the thermal power generating unit; finally, an ideal valve flow function is established on basis of the actual valve flow performance data; configuration of a digital electro-hydraulic system of the thermal power generating unit is set with the ideal valve flow function so that an actual valve flow function is consistent to the ideal valve flow function, and the valve flow function is optimized. Compared with the prior art, the method has the advantages that the valve flow function can be optimized without performing a valve flow performance test, optimization time is shortened, and optimization efficiency is improved; the influence of main steam pressure is fully considered in the calculation of theoretical steam flow, a calculation error caused by fluctuation of the main steam pressure is avoided, and optimization precision is improved.

Description

technical field [0001] The invention belongs to the technical field of thermal power generating sets, and in particular relates to a valve flow function optimization method based on unit operating data. Background technique [0002] The valve flow characteristic of the steam turbine refers to the corresponding relationship between the steam valve opening adjusted by the steam turbine and the steam flow entering the steam turbine. This correspondence generally has nonlinear characteristics, which is not conducive to the control of the unit. The valve flow function of the steam turbine sets the flow command and adjusts the steam valve mapping relationship, in order to establish a linear relationship between the flow command and the steam flow, and finally optimize the control characteristics of the system. Since the valve flow function is generally preset by the manufacturer, and the flow characteristics of the unit may change during installation, operation, and maintenance, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 盛锴寻新王伯春朱晓星
Owner STATE GRID CORP OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap