A method for state-space steam temperature control of utility boilers

A technology of state space and steam temperature control, applied in superheat temperature control, steam superheating, steam generation, etc., can solve the problems of unit steam temperature lag, control loop system difficult to achieve control effect, water spray valve nonlinearity, etc., to achieve Reduced coal consumption rate, high labor intensity and high quality control effect

Active Publication Date: 2021-12-17
上海圆曦电力科技有限公司
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the automatic control systems of thermal power units are realized by conventional classical control theory, and it is difficult to achieve ideal control effects for complex control loop systems
At present, the superheated steam temperature and reheated steam temperature control of power plant boilers almost all adopt the conventional cascade control system, and the steam temperature of many units has a large lag of the controlled object, and the water injection valve has serious nonlinearity

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
  • A method for state-space steam temperature control of utility boilers
  • A method for state-space steam temperature control of utility boilers
  • A method for state-space steam temperature control of utility boilers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0048] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0049] A method for state space steam temperature control of a power plant boiler, characterized in that it comprises the following steps:

[0050] Step 1, export the operation history data of the measuring points related to the boiler steam temperature, and the sampling period is 1S;

[0051] Step 2, performing averaging, smoothing and filtering processing on the exported operation history data file to obtain a processed database with a sampling period of 10S;

[0052] The ...

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 steam temperature control method in the state space of a power plant boiler, which relates to the technical field of automatic control of steam temperature. Different PID control types can be selected according to the differences in the on-site unit control DCS system, and the state space is used to control the steam temperature and parameter setting automatically. Optimizing, selecting optimized control indicators, optimizing control parameters, testing and optimizing the entire control system, and quickly realizing optimal control of steam temperature. The invention improves the long-term average steam temperature value of the generator set, and the minimum steam temperature control can be increased by more than 10°C; and reduces the coal consumption rate of the generator set by 1.20g / kw.h; the invention can keep the power station boiler in an automatic control state, The labor intensity of the operating personnel is greatly reduced; the small change of the superheated steam temperature improves the safe operation rate of the unit and prolongs the service life of the equipment.

Description

technical field [0001] The invention relates to the technical field of automatic control, in particular to a method for controlling steam temperature in a state space of a power plant boiler. Background technique [0002] Most of the automatic control systems of thermal power units are implemented by conventional classical control theory, and it is difficult to achieve ideal control effects for complex control loop systems. At present, the superheated steam temperature and reheated steam temperature control of power plant boilers almost all adopt the conventional cascade control system, and the steam temperature controlled objects of many units have a large lag, and the water injection valve has serious nonlinearity. When the unit load (steam flow) changes, the steam temperature deviates from the set value by more than 8-10°C, and the over-temperature is very frequent. The main and reheat steam temperature is an important parameter in the thermal system of the unit, and the...

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 Patents(China)
IPC IPC(8): F22G5/20
CPCF22G5/20
Inventor 丁建设
Owner 上海圆曦电力科技有限公司
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