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Identification method and system for automatic model gain of superheated steam temperature

A superheated steam temperature, automatic model technology, applied in the field of thermal power plants, can solve the problems of the control system not working properly, the gain change of the inert zone, etc., and achieve the improvement of steam temperature dynamic and static response characteristics, good real-time performance, and strong applicability Effect

Active Publication Date: 2019-11-08
BEIJING YUANSHEN ENERGY SAVING TECH
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Problems solved by technology

However, in field practice, due to the change of the adjustment range of the leading steam temperature, the gain of the inertia zone changes significantly, and the fixed or no online correction of the differentiator gain may cause the control system to fail to work normally.

Method used

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  • Identification method and system for automatic model gain of superheated steam temperature
  • Identification method and system for automatic model gain of superheated steam temperature
  • Identification method and system for automatic model gain of superheated steam temperature

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Embodiment Construction

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0037] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element refe...

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Abstract

The invention provides an automatic superheated steam temperature model gain identification method and system. The automatic superheated steam temperature model gain identification method comprises the following steps that desuperheater rear enthalpy rise is obtained according to a desuperheater rear enthalpy value H1 and a deuperheater rear enthalpy value H2 correspondingly before and after the advancing temperature change; a current superheater outlet enthalpy value H3 is obtained according to superheater outlet pressure and current superheater outlet temperature; the superheater outlet temperature rise is obtained according to the current superheater outlet enthalpy value H3 and the desuperheater rear enthalpy rise; and according to the superheater outlet temperature rise and an advancing temperature changing amount A, superheated steam temperature inertia area gain is obtained. By means of the automatic superheated steam temperature model gain identification method and system, thegain of an advancing differential loop differentiator can be identified and corrected online, and therefore the dynamic response and static response of a controlled object are improved, and the control quality is improved. The automatic superheated steam temperature model gain identification method and system have the advantages of being good in real-time performance and high in applicability.

Description

technical field [0001] The invention relates to the technical field of thermal power plants, in particular to an identification method and system for automatic model gain of superheated steam temperature. Background technique [0002] The boiler superheated steam temperature control system in a thermal power plant is an important part of improving the thermal efficiency of the unit and ensuring the safe operation of the unit. The control of superheated steam temperature is one of the more difficult tasks in boiler control. The reason is that during the operation of the unit, there are many factors that cause the temperature of the main steam to change, and the amount of disturbance is large, including the two angles of the steam side and the flue gas side. Disturbance factors on the steam side mainly include: boiler load, feed water temperature, desuperheating water temperature and flow, etc. Disturbance factors on the flue gas side mainly include flue gas volume, burner ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F22G5/20
CPCF22G5/20
Inventor 赵民政金生祥隋晓峰赵岩张秉权王潇李振华杨伴龙王彦龙郭强孙锐郑妍
Owner BEIJING YUANSHEN ENERGY SAVING TECH
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