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Soft measurement method for last-stage exhaust enthalpy of steam turbine

A technology of exhaust enthalpy and steam turbine, applied in computer parts, computing models, artificial life, etc., can solve problems such as calculation accuracy and model generalization ability limitation, and achieve the effect of online accurate measurement

Inactive Publication Date: 2021-10-26
TAIYUAN UNIV OF TECH
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Problems solved by technology

These methods show good performance for specific operating conditions, but when calculated in real time, the calculation accuracy and model generalization ability will be limited

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  • Soft measurement method for last-stage exhaust enthalpy of steam turbine
  • Soft measurement method for last-stage exhaust enthalpy of steam turbine
  • Soft measurement method for last-stage exhaust enthalpy of steam turbine

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Embodiment Construction

[0046] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary persons in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] Refer to attached figure 1 , a kind of steam turbine last-stage exhaust steam enthalpy soft measurement method provided by the present invention comprises:

[0048] Obtain the historical operation data of the key characteristic variables affecting the final exhaust steam enthalpy of the steam turbine unit, mark the specific enthalpy of the final exhaust steam of the steam turbine correspon...

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Abstract

The invention discloses a soft measurement method for the final-stage exhaust enthalpy of a steam turbine, and the method comprises the steps: carrying out the collection and storage of historical operation data of key characteristic variables which affect the final-stage exhaust enthalpy value of a steam turbine unit, carrying out the outlier elimination, screening of steady-state working conditions, and determining the final-stage exhaust enthalpy value of the steam turbine through the combination with an XGBoost algorithm which is subjected to particle swarm optimization (PSO). The soft measurement model for the last-stage exhaust enthalpy of the steam turbine can realize the online accurate measurement of the last-stage exhaust enthalpy value of a unit, and has important significance on the online real-time monitoring of the economic performance of the steam turbine.

Description

technical field [0001] The invention relates to the technical field of thermal equipment data prediction, in particular to a soft measurement method for exhaust steam enthalpy at the last stage of a steam turbine. Background technique [0002] The calculation accuracy of exhaust steam enthalpy in the final stage of steam turbine will directly affect the calculation of low-pressure cylinder efficiency and unit economy. However, the exhaust steam at the last stage of the steam turbine is in the wet steam region, and its enthalpy value is not only affected by the exhaust steam temperature and pressure, but also affected by the exhaust steam humidity. However, the online real-time monitoring of the exhaust steam humidity cannot be realized. The determination of the exhaust steam enthalpy of the steam turbine brings certain difficulties. Therefore, it is of great significance to construct a steam turbine exhaust enthalpy soft-sensing model based on the historical data method for...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06F30/15G06K9/62G06N3/00G06F111/10
CPCG06F30/27G06F30/15G06N3/006G06F2111/10G06F18/2148G06F18/24323
Inventor 徐婧赵贯甲崔智鹏马素霞刘文浩
Owner TAIYUAN UNIV OF TECH
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