Industrial gas turbine ignition starting test adjusting strategy and method
By systematically analyzing and adjusting the key adjustment parameters of the gas turbine, the problem of rapid correction of the gas turbine ignition and start failure is solved, and efficient ignition and start test is achieved.
Patent Information
- Application Number
- CN202510343946.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-22
- Publication Date
- 2025-06-20
AI Technical Summary
It is difficult for the existing technology to conduct rapid and efficient tests and rapid adjustments to the gas turbine ignition and start-up process during factory testing, site commissioning and production operation.
By systematically analyzing and classifying the phenomenon of gas turbine ignition failure, adjusting key adjustment parameters such as initial fuel volume, ignition time, ignition path regulating valve opening and fuel growth curve, and formulating targeted test correction strategies and methods.
It has achieved rapid and effective correction of failures in ignition start tests of industrial gas turbines, and improved the efficiency of ignition start tests and test verification.
Smart Images
Figure CN120177039A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a gas turbine test method, specifically a gas turbine ignition start-up test method. Background Art
[0002] Industrial gas turbines, as a reliable power equipment, are widely used in fields such as energy and chemical industry, and are involved in industrial scenarios such as offshore platforms, natural gas long-distance pipelines, distributed energy, and mobile power generation. As the core key power source in various application scenarios, the success rate of ignition and start-up of gas turbines is crucial. However, due to the technical complexity of the start-up link of gas turbines, there is no mature and reliable test adjustment strategy and method for quickly and efficiently testing the ignition and start-up process of gas turbines and quickly adjusting the ignition and start-up failures during the factory test stage, field station commissioning stage, and production operation stage. Summary of the Invention
[0003] The purpose of the present invention is to provide an ignition start-up test adjustment strategy and method for industrial gas turbines that can systematically analyze and quickly and effectively adjust and correct the ignition start-up failure faults of gas turbines.
[0004] The purpose of the present invention is achieved as follows:
[0005] An ignition start-up test adjustment strategy and method for industrial gas turbines of the present invention is characterized by including the following steps:
[0006] (1) The gas turbine first completes static commissioning and cold blowing commissioning to determine that the starting motor and natural gas regulation system have completed status checks and confirmations, and the unit is ready for ignition.
[0007] (2) Complete the initial setting of the unit start-up adjustment parameters, determine the parameter judgment conditions for successful start-up, and after the unit passes the start-up interlock check, execute the ignition start-up program.
[0008] (3) Judge whether the unit successfully ignites and starts according to the established judgment requirements and the test range; if the start-up success conditions are met, it is determined that the ignition start-up test of the unit is successful this time, otherwise it is determined that the ignition start-up test of the unit fails this time. Systematically analyze and classify the unit start-up failure according to the phenomenon, and conduct targeted inspections and start-up adjustment parameter corrections.
[0009] (4) After completing the systematic analysis and adjustment, conduct the ignition start-up test again and judge according to the established success conditions. When the parameter judgment conditions meet the requirements, confirm that the ignition start-up test of the unit is qualified and finally determine the unit start-up adjustment parameter setting scheme; otherwise, conduct classification and collection and targeted adjustment again according to the failure phenomenon.
[0010] The present invention may further include:
[0011] 1. The static debugging includes insulation inspection of the starting motor, rotation direction test, action test of the cut-off valve and regulating valve of the natural gas system, and status test of the igniter.
[0012] 2. The initial setting of the unit starting adjustment parameters includes initial setting of the initial fuel quantity, ignition duration, opening degree of the ignition path regulating valve, and fuel acceleration curve. When determining the condition of the gas turbine starting to the slow speed operating condition, determine the normal ranges of the average exhaust gas temperature, exhaust gas temperature field deviation value, low-pressure compressor speed, and high-pressure compressor speed.
[0013] 3. When the reason for the failure of the ignition starting test is that the low-pressure speed fails to increase normally before the starting motor disengages, the adjustment strategy is: first check the status of the starting motor, the operating current of the starting motor, and the frequency parameters, and check and adjust the parameter settings of the starting motor frequency converter.
[0014] 4. When the reason for the failure of the ignition starting test is that the exhaust gas temperature does not change normally, the adjustment strategy is: first check whether the working status of the igniter is normal and whether the fuel supply status of the ignition path is normal; secondly, consider increasing the initial fuel quantity and ignition duration progressively within the design requirements; finally, gradually adjust the opening degree of the ignition path regulating valve.
[0015] 5. When the reason for the failure of the ignition starting test is that the unit has phenomena such as exhaust gas over-temperature, flameout, or thermal hang-up and cannot enter the slow speed condition normally, the adjustment strategy is: according to the specific characteristic parameter change phenomena during the starting failure, adjust the fuel acceleration curve, and if necessary, correct the initial fuel quantity within a certain range.
[0016] 6. When the reason for the failure of the ignition starting test is that single / several flame tubes extinguish or reignite during the unit starting process, the adjustment strategy is: conduct multiple ignition starting tests. If it is determined that it is a fixed single / multiple flame tubes extinguishing, replace the fuel nozzle corresponding to the extinguished one or its throttling component; otherwise, adjust the fuel acceleration curve and correct the initial fuel quantity within a certain range.
[0017] The advantages of the present invention are as follows: By systematically analyzing and classifying the phenomena of ignition starting failure, the present invention clarifies the key adjustment parameters for solving starting failure, such as the initial fuel quantity, ignition duration, opening degree of the ignition path regulating valve, and fuel acceleration curve. By adjusting the starting adjustment parameters, targeted test correction strategies and methods are formulated. Using this method, the failure of the ignition starting test of an industrial gas turbine fueled by natural gas can be quickly and effectively corrected and adjusted, thereby realizing the efficient development of the ignition starting test and test verification of the gas turbine.
[0018] In addition, the gist and concept of the present invention can be extended to other types of gas turbine ignition start-up test fields, providing systematic and standardized strategies and methods for the test, fault analysis, and adjustment of the gas turbine ignition start-up process. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 is a flowchart of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The present invention will be described in more detail with reference to the accompanying drawings as follows:
[0021] Combined with Figure 1 , the process of the present invention is as follows:
[0022] 1. First, the gas turbine completes static commissioning and cold blow commissioning to ensure that the auxiliary systems such as the starting motor and natural gas regulation system have completed status checks and confirmations, and the unit is ready for ignition.
[0023] Before the gas turbine conducts an ignition start-up test, the unit's static commissioning should be completed first, and status checks and confirmations should be carried out on the participating gas turbine and auxiliary systems, including insulation checks, rotation tests of the starting motor, action tests of the cut-off valve and regulating valve of the natural gas system, and status tests of the igniter. Complete the unit's static protection function check and complete the unit's cold blow test.
[0024] 2. Complete the initial setting of the unit's start-up adjustment parameters. Determine the parameter judgment conditions for successful start-up. After the unit passes the start-up interlock check, execute the ignition start-up program.
[0025] For the start-up adjustment parameters under test: initial fuel quantity, ignition duration, opening degree of the ignition path regulating valve, fuel acceleration curve, etc., perform initial settings. Determine the normal ranges of the average exhaust gas temperature, exhaust gas temperature field deviation value, low-pressure compressor speed, and high-pressure compressor speed when the gas turbine starts up to the slow-speed operating condition.
[0026] After the unit passes the start-up interlock check, execute the ignition start-up program.
[0027] 3. According to the established judgment requirements and test ranges, judge whether the unit has successfully ignited and started. If the start-up success conditions are met, it is determined that the unit's ignition start-up test is successful this time; otherwise, it is determined that the unit's ignition start-up test fails this time. Systematically analyze and classify the unit's start-up failure according to the phenomena, and conduct targeted inspections and corrections of the start-up adjustment parameters.
[0028] Before the starting motor is disengaged, if the low-pressure speed fails to increase normally during start-up, the ignition start-up fails. The adjustment strategy is: first check the status of the starting motor, parameters such as the operating current and frequency of the starting motor, and check and adjust the parameter settings of the starting motor frequency converter.
[0029] The ignition of the unit fails, the exhaust gas temperature does not change normally, and the start fails. The adjustment strategy is as follows: First, check whether the igniter is working properly and whether the fuel supply state of the ignition circuit is normal. Second, consider increasing the initial fuel quantity and ignition duration progressively within the design requirements. Finally, manually adjust the opening degree of the regulating valve of the ignition circuit step by step. Among them, the correction of the initial fuel quantity should be restricted by the design requirements; the adjustment range of the opening degree of the regulating valve of the ignition circuit can be estimated in advance.
[0030] The unit has situations such as exhaust gas over-temperature, flameout, or thermal hang-up and cannot enter the idle speed condition normally. The adjustment strategy is as follows: According to the specific characteristic parameter change phenomena during the start failure, such as the dynamic change of the exhaust gas temperature field, etc., adjust the fuel acceleration curve, and if necessary, correct the initial fuel quantity within a certain range.
[0031] During the start process of the unit, single / several flame tubes experience flameout or re-ignition after flameout. The adjustment strategy is as follows: Conduct multiple ignition start tests. If it is determined that there is fixed single / multiple flameouts (including re-ignition after flameout), consider replacing the fuel nozzle corresponding to the flameout or its throttling component. Otherwise, adjust the fuel acceleration curve and correct the initial fuel quantity within a certain range.
[0032] 4. After completing the systematic analysis and adjustment, conduct the ignition start test again and judge according to the established success conditions. When the parameter judgment conditions are met, confirm that the ignition start test of the unit is qualified and finally determine the setting scheme of the unit start adjustment parameters. Otherwise, classify and summarize again according to the failure phenomena and make targeted adjustments.
Claims
1. An industrial gas turbine ignition start-up test adjustment strategy and method, characterized by: The steps include: (1) The gas turbine must first complete static commissioning and cold blow commissioning, and ensure that the starter motor and natural gas regulation system have completed status inspection and confirmation, and the unit is ready for ignition; (2) Complete the initial setting of the unit's starting adjustment parameters, determine the parameter judgment conditions for successful starting, and control the unit to execute the ignition starting procedure after passing the starting interlocking check; (3) According to the established judgment requirements and test scope, determine whether the unit is successfully ignited and started; if the start-up success conditions are met, the unit is determined to have successfully completed the ignition and start-up test; otherwise, the unit is determined to have failed the ignition and start-up test, and the unit start-up failure is systematically analyzed and classified according to the phenomenon, and targeted inspections and start-up adjustment parameters are corrected; (4) After completing the systematic analysis and adjustment, the ignition and starting test is carried out again and judged according to the established success conditions. When the parameter judgment conditions meet the requirements, the unit ignition and starting test is confirmed to be qualified, and the unit starting adjustment parameter setting plan is finally determined; otherwise, classification and targeted adjustments are carried out again according to the failure phenomenon.
2. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: The static debugging includes insulation inspection of the starter motor, steering test, action test of the natural gas system shut-off valve and regulating valve, and status test of the igniter.
3. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: The initial setting of the unit start-up adjustment parameters includes the initial setting of the initial fuel quantity, ignition duration, ignition path regulating valve opening, and fuel speed increase curve. Determine the normal range of the exhaust temperature mean, exhaust temperature field deviation, low-pressure compressor speed, and high-pressure compressor speed when the engine is started to the slow speed condition.
4. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: When the reason for the failure of the ignition starting test is that the low-voltage speed of the unit does not achieve normal speed increase before the starter motor is disengaged, the adjustment strategy is: give priority to checking the starter motor status, starter motor operating current, and frequency parameters, and check and adjust the starter motor inverter parameter settings.
5. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: When the reason for the failure of the ignition starting test is that the exhaust temperature does not change normally, the adjustment strategy is: first check whether the igniter is working normally and whether the fuel supply status of the ignition circuit is normal; secondly, consider progressively increasing the initial fuel amount and ignition time within the design requirements; finally, gradually adjust the opening of the ignition circuit regulating valve.
6. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: When the reason for the failure of the ignition starting test is that the unit has exhaust overtemperature, flameout or thermal suspension and cannot enter the slow running condition normally, the adjustment strategy is: adjust the fuel growth rate curve according to the specific characteristic parameter changes when the starting fails, and make corrections to the initial fuel amount within the range when necessary.
7. The industrial gas turbine ignition start-up test adjustment strategy and method according to claim 1, characterized in that: When the reason for the failure of the ignition and starting test is that a single / several flame tubes fail or flameout and re-ignition occur during the unit startup process, the adjustment strategy is: perform multiple ignition and starting tests, and if it is a fixed single / or multiple flameout, replace the fuel nozzle or its throttling component corresponding to the flameout, otherwise adjust the fuel growth rate curve and make corrections to the initial fuel amount within a range.