CN-122021037-A - Energy efficiency analysis method and related device for gas turbine unit

Abstract

The application discloses a gas unit energy efficiency analysis method and a related device, wherein the method is used for acquiring working condition operation data of each unit of a target gas unit by constructing a thermodynamic coupling model based on a gas unit energy transfer relationship, and calculating the total shaft power of the unit and the energy conversion efficiency of each unit according to the working condition operation data by using the thermodynamic coupling model to form a unit energy efficiency index, so that an energy efficiency evaluation result of the target gas unit is determined, the quantitative analysis of the total energy efficiency and the unit energy efficiency of the unit is realized, the operation energy efficiency of the unit under different working conditions can be accurately reflected, and a direct basis is provided for the operation evaluation and optimization of the gas unit.

Inventors

• WANG YAPING
• WANG JIADONG
• ZHANG MING
• PENG JIACHENG
• SHEN JUNHENG
• WANG LEI
• JIAO MIN
• WANG YUTIAN
• WANG HEMEI

Assignees

• 国电电力发展股份有限公司
• 国能国华(北京)燃气热电有限公司

Dates

Publication Date

20260512

Application Date

20260203

Claims (10)

1. 1. The energy efficiency analysis method of the gas unit is characterized by comprising the following steps of: Based on the energy transfer relation of each unit in the target gas unit, constructing a thermodynamic coupling model of the target gas unit; acquiring working condition operation data of each unit of the target gas unit; Operating the data computer group energy efficiency index according to the working condition by utilizing the thermodynamic coupling model; And determining an energy efficiency evaluation result of the target gas unit according to the unit energy efficiency index.
2. 2. The method of claim 1, wherein operating the data computer group energy efficiency indicator according to the operating conditions using the thermal coupling model comprises: Calculating the total shaft work output of the target gas unit and the energy conversion efficiency of each unit in the target gas unit according to the working condition operation data by utilizing the thermal coupling model; And outputting total energy efficiency of the computer unit according to the total shaft work, and recording the energy conversion efficiency of each unit as unit energy efficiency, wherein the total energy efficiency of the computer unit and the unit energy efficiency are used as unit energy efficiency indexes.
3. 3. The method of claim 1, wherein operating the data computer group energy efficiency indicator according to the operating conditions using the thermal coupling model further comprises: Calculating unit energy efficiency initial values respectively corresponding to the waste heat boiler and the steam turbine by utilizing a thermodynamic coupling model according to the working condition operation data corresponding to the waste heat boiler and the steam turbine; Performing deviation correction on the initial unit energy efficiency value of the waste heat boiler by using the working condition operation data of the gas turbine to obtain a unit energy efficiency correction value of the waste heat boiler; and carrying out deviation correction on the initial unit energy efficiency value of the steam turbine by using the working condition operation data of the waste heat boiler to obtain the unit energy efficiency correction value of the steam turbine.
4. 4. The method of claim 3, wherein the performing offset correction on the initial unit energy efficiency value of the exhaust-heat boiler using the operating condition data of the gas turbine to obtain the unit energy efficiency correction value of the exhaust-heat boiler comprises: the relationship between the exhaust gas temperature of the gas turbine and the unit energy efficiency of the waste heat boiler is constructed as follows: , Wherein, the Represents the initial value of the unit energy efficiency of the waste heat boiler, Indicating the unit energy efficiency correction value of the waste heat boiler, The exhaust gas temperature of the gas turbine is indicated, The design value of the exhaust gas temperature is shown.
5. 5. The method of claim 3, wherein the performing offset correction on the initial unit energy efficiency value of the steam turbine using the operating condition operation data of the exhaust-heat boiler to obtain the unit energy efficiency correction value of the steam turbine comprises: The relationship between the steam pressure of the constructed waste heat boiler and the unit energy efficiency of the steam turbine is as follows: , Wherein, the Represents the initial value of the unit energy efficiency of the steam turbine, Indicating a unit energy efficiency correction value of the steam turbine, Represents the steam pressure of the waste heat boiler, Representing the vapor pressure design value.
6. 6. The method of claim 2, wherein the determining the energy efficiency assessment of the target gas turbine based on the turbine energy efficiency indicator comprises: And when the total energy efficiency of the unit meets the total energy efficiency standard condition, and the unit energy efficiency of each unit meets the corresponding unit energy efficiency standard condition, recording the energy efficiency evaluation result of the target gas unit as energy efficiency standard, otherwise recording the energy efficiency as energy efficiency standard.
7. 7. The method of claim 6, wherein when the energy efficiency evaluation result of the target gas turbine unit is that the energy efficiency is not up to standard, the method further comprises: calculating the total energy efficiency loss of the target gas unit and the energy efficiency influence sensitivity of each operation condition parameter; And determining the adjustment priority of the operation condition parameters according to the total energy efficiency loss and the energy efficiency influence sensitivity of each operation condition parameter.
8. 8. An energy efficiency analysis device for a gas turbine unit, comprising: The thermodynamic modeling module is used for constructing a thermodynamic coupling model of the target gas turbine unit based on the energy transfer relation of each unit in the target gas turbine unit; The data acquisition module is used for acquiring working condition operation data of each unit of the target gas unit; The energy efficiency calculation module is used for calculating energy efficiency indexes of the unit according to the working condition operation data by utilizing the thermodynamic coupling model; And the energy efficiency evaluation module is used for determining an energy efficiency evaluation result of the target gas turbine unit according to the turbine unit energy efficiency index.
9. 9. An electronic device comprising a memory storing computer executable instructions and a processor, which when executed by the processor causes the device to perform the gas turbine train energy efficiency analysis method of any one of claims 1-7.
10. 10. A readable storage medium storing a computer executable program which when executed implements the gas turbine unit energy efficiency analysis method according to any one of claims 1 to 7.

Description

Energy efficiency analysis method and related device for gas turbine unit Technical Field The invention belongs to the technology of energy efficiency analysis of electrical equipment, and particularly relates to a method and a related device for energy efficiency analysis of a gas turbine unit. Background The gas-steam combined cycle unit is a high-efficiency power generation system consisting of a gas turbine, an exhaust-heat boiler and a steam turbine, and the operation process of the gas-steam combined cycle unit is influenced by factors such as ambient temperature, load change, fuel quality and the like, and has obvious dynamic property and coupling property. In order to improve the energy efficiency of a unit, currently, an optimal combination of working conditions and parameters is generally tried to be mined by utilizing historical operation data, so that reference operation parameters of different load intervals are formed, and energy efficiency loss caused by manual experience adjustment is reduced. Because the gas unit has fast parameter fluctuation, strong coupling and complex physical process, the prior art has obvious limitations. On one hand, the data acquisition is rough, the data quality is difficult to ensure, the accuracy of subsequent analysis is difficult to influence, secondly, the traditional method mainly depends on historical data statistics, lacks mechanism description of a key heat transfer process of a unit, is difficult to reflect multi-unit coupling characteristics of the unit, screening results deviate from actual operation rules, and further, due to the fact that the working condition division is too dependent on a load section, the load change rate, the environmental conditions and the parameter fluctuation characteristics are not fully considered, the application range is limited, and the accuracy and the reliability are insufficient under the rapid working condition change or abnormal working condition. Therefore, the prior art has the defects in the aspects of data quality assurance, mechanism modeling, parameter weight analysis, energy efficiency evaluation, complex working condition adaptation and the like, and is difficult to meet the requirements of the gas turbine unit on high-precision energy efficiency analysis and optimization adjustment under the full working condition operation condition. Disclosure of Invention Based on the method, the invention aims to provide an energy efficiency analysis method and a related device for a gas turbine unit, physical modeling is carried out based on an energy transfer rule of the gas turbine unit, and an energy efficiency quantitative evaluation system is constructed by combining real turbine unit operation data, so that the current energy efficiency of the turbine unit is scientifically and accurately reflected, and the energy efficiency of the turbine unit is maximized. In a first aspect, the present invention provides a method for analyzing energy efficiency of a gas turbine unit, including: Based on the energy transfer relation of each unit in the target gas unit, constructing a thermodynamic coupling model of the target gas unit; Acquiring working condition operation data of each unit of the target gas unit; Operating the data to calculate the energy efficiency index of the unit according to the working condition by utilizing the thermodynamic coupling model; And determining an energy efficiency evaluation result of the target gas unit according to the unit energy efficiency index. Further, the operation of the data computer group energy efficiency index according to the working condition by using the thermodynamic coupling model comprises the following steps: Calculating the total shaft work output of the target gas turbine unit and the energy conversion efficiency of each unit in the target gas turbine unit according to the working condition operation data by utilizing the thermodynamic coupling model; and outputting the total energy efficiency of the computer unit according to the total shaft work, and recording the energy conversion efficiency of each unit as unit energy efficiency, wherein the total energy efficiency of the computer unit and the energy efficiency of each unit are used as unit energy efficiency indexes. Further, the method for operating the data computer group energy efficiency index according to the working condition by using the thermodynamic coupling model further comprises the following steps: Calculating unit energy efficiency initial values respectively corresponding to the waste heat boiler and the steam turbine by utilizing a thermodynamic coupling model according to the working condition operation data corresponding to the waste heat boiler and the steam turbine; Performing deviation correction on the initial unit energy efficiency value of the waste heat boiler by using the working condition operation data of the gas turbine to obtain a unit energy efficiency correction value of the waste hea