Gas steam combined cycle unit multivariable constrained prediction function load control method

A combined cycle unit and prediction function technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as difficulty in raising and lowering load rate, difficult application engineering, fluctuation of main steam pressure of steam turbine, etc.

Active Publication Date: 2014-10-08
SOUTHEAST UNIV
View PDF6 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The purpose of the present invention is to provide a load control system for combined cycle units and a steam turbine main steam pressure control system to solve the problem that the traditional combined cycle unit’s rate of load increase and decrease is diffic...

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
  • Gas steam combined cycle unit multivariable constrained prediction function load control method
  • Gas steam combined cycle unit multivariable constrained prediction function load control method
  • Gas steam combined cycle unit multivariable constrained prediction function load control method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0049] The 180MW gas-steam combined cycle unit of a certain power plant is improved by using the present invention, so as to cope with the newly formulated unit raising and lowering rate standards. The specific implementation process is as follows:

[0050] Its traditional gas-steam combined cycle unit uses a control system consisting of three parts: temperature control loop, speed control loop and acceleration control loop. Here, a multi-variable controlled object model is directly established in which the fuel valve of the gas turbine and the inlet regulating valve of the steam turbine are taken as the input, and the actual power of the combined cycle unit and the main steam pressure of the steam turbine are taken as the output, and the speed and exhaust gas temperature of the gas turbine are only considered as safety factors. At the same time, adjust the frequency modulation command once and superimpose it on the gas turbine load command.

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 gas steam combined cycle unit multivariable constrained prediction function load control method. The method is characterized by comprising the steps that (1) an original load instruction counter circuit is adjusted, and a primary frequency modulation instruction is superposed onto a load instruction of a gas turbine; (2) a 2*2 controlled object model with gas turbine fuel valve opening and steam turbine inlet adjusting valve opening as input and combined cycle unit actual power and steam turbine main steam pressure as output is built, wherein the controlled object model is expressed by an equation shown in the specification, PW is the combined cycle unit actual power (MW), TP is the steam turbine main steam pressure (MPa), U1 is the gas turbine fuel valve opening (%), U2 is the steam turbine inlet adjusting valve opening (%), G11 is a transfer function with the U1 as input and the TP as output, G12 is a transfer function with the U2 as input and the PW as output, G21 is a transfer function with the U1 as input and the TP as output, and G22 is a transfer function with the U2 as input and the TP as output; in addition, it is ensured that denominators of the G11 and the G12 are the same, and the denominators of the G21 and the G22 are the same after reduction of fractions to a common denominator is carried out on the transfer functions.

Description

technical field [0001] The invention relates to a multivariable predictive function control method for load control of a gas-steam combined cycle unit, which establishes a new multivariable controlled object model, adopts the latest predictive function recursive algorithm, and makes the actual power of the combined cycle unit reach a new level. The standard for the unit's rising and falling load rate is formulated, and the main steam pressure of the steam turbine is stabilized at the set value as soon as possible, which belongs to the field of thermal automatic control. Background technique [0002] Since the implementation of the "Renewable Energy Law" in 2006, new energy power generation technology has received more and more attention, and the proportion of new energy power generation in the power grid has gradually increased. After more than 60 years of development, the gas-steam combined cycle unit has a series of advantages such as high efficiency, high flexibility, low...

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
IPC IPC(8): G05B13/04
Inventor 吕剑虹高宇崔晓波陈雨亭秦文炜
Owner SOUTHEAST UNIV
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