A fast energy-saving predictive control method for superheated steam temperature

A superheated steam temperature, predictive control technology, applied in the direction of temperature control using electric mode, auxiliary controller with auxiliary heating device, adaptive control, etc., can solve the problems of lack, difficult engineering realization, large amount of calculation, etc.

Active Publication Date: 2016-06-08
NANJING GUITU TECH DEV
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Problems solved by technology

[0005] Purpose of the invention: In view of the above problems, a fast energy-saving predictive control method for superheated steam temperature is proposed to solve the shortcomings of traditional predictive control methods, such as complex algorithm, large amount of calculation and lack of effective control parameters to effectively adjust the system control performance, which is difficult to realize in engineering

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  • A fast energy-saving predictive control method for superheated steam temperature
  • A fast energy-saving predictive control method for superheated steam temperature
  • A fast energy-saving predictive control method for superheated steam temperature

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Embodiment Construction

[0026] The present invention will be further explained below in conjunction with the accompanying drawings and specific embodiments.

[0027] Step 1: Obtain the step response model of the superheated steam temperature object. Under steady-state conditions, conduct an open-loop step response test of the opening of the desuperheating spray valve to obtain system response data, and use the step response model identification method. The transfer function model of desuperheating water injection valve opening (% / ℃)-superheated steam temperature is identified as follows:

[0028] G T ( s ) = - 7.961 ( 19 s + 1 ) 2 ( ...

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Abstract

The invention discloses a superheated steam temperature rapid energy-saving predictive control method. The method obtains the controlled object predictive control model through the step test of the superheated steam temperature object. Control quantity sequence and superheated steam temperature measurement value sequence, the control system obtains the current desuperheating spray valve opening degree through simple calculation according to the new performance index proposed by this patent. This control method solves the problem of complex optimization problems in traditional limited predictive control, large amount of calculation, and lack of effective control parameters to adjust the system control performance. It can make the superheated steam temperature control stable and fast, and the process dynamic deviation is small. And there is no steady-state deviation. While ensuring the quality of control, the method can also reduce the amount of cooling spray water in the control process and improve the economical efficiency of unit operation.

Description

technical field [0001] The invention belongs to the technical field of thermal automatic control, and in particular relates to a superheated steam temperature rapid energy-saving prediction control method. Background technique [0002] The superheated steam temperature is an important parameter in the thermodynamic system of a thermal power plant. The quality of the superheated steam temperature control directly affects the safe and economical operation of the entire unit. The superheated steam temperature control system is one of the important control systems of the unit. Since the superheated steam temperature object is a thermal object with a large lag and a large delay, and with the increase of the capacity of the unit, this characteristic will be more significant. The traditional PID control algorithm is often difficult to meet the fast and stable control requirements, which affects the safe and economical operation of the unit. Therefore, it is of great significance t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/32G05B13/04
Inventor 雎刚陈欢乐陈雪峰
Owner NANJING GUITU TECH DEV
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