Method and system for matching parameters of starting machine and furnace of steam turbine
By optimizing the parameter matching relationship of the starter furnace in the combined cycle unit, the optimal starting parameters within the metal temperature and body expansion difference range are determined, which solves the problem of slow unit start speed and improves the starting efficiency and operation efficiency.
Patent Information
- Application Number
- CN202411834972.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-13
- Publication Date
- 2025-03-21
AI Technical Summary
The combined cycle unit is slow during startup, resulting in insufficient room for improvement in unit performance.
By obtaining the maximum adjustment range of the starter parameters of the starter furnace of the steam turbine combined cycle unit, the sampling group is divided to obtain the parameter samples, and the optimal starting parameter range within the metal temperature and body expansion difference range is determined through the start-up test.
The starting parameter matching relationship is optimized, the starting parameter and load rate are improved, and the startup time is ultimately shortened, and the unit operation efficiency is improved.
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Figure CN119664447A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of combined cycle unit starting, and in particular to a method and system for matching parameters of a steam turbine starter boiler. Background Art
[0002] With the adjustment of my country's energy structure, combined cycle units using natural gas as the main fuel have been more widely used. Compared with generator sets using coal as the main fuel, combined cycle units have significant advantages such as fast startup, strong flexibility, clean and environmentally friendly, and are usually used as peak load units. In the existing technology, there is still a problem of slow startup speed during the startup process of combined cycle units. As an important indicator for measuring unit performance, the startup speed of combined cycle units still has room for improvement. Summary of the invention
[0003] The purpose of the present invention is to provide a method and system for matching parameters of a steam turbine starter boiler in order to solve at least one of the above technical problems.
[0004] In the first aspect, an embodiment of the present invention provides a method for matching parameters of a steam turbine starter furnace, which is applied to a steam turbine combined cycle unit; comprising: obtaining a maximum adjustment range of the starting parameters of the starter furnace of the steam turbine combined cycle unit; dividing the maximum adjustment range into multiple sampling groups based on a first sampling interval, and sampling in each sampling group to obtain multiple parameter samples; performing a starting test on the starter furnace based on each parameter sample, respectively, to obtain the metal temperature, body expansion difference level and starting time of the steam turbine combined cycle unit at different positions when the starter furnace is started under the conditions of each parameter sample; determining the sampling group where the parameter sample corresponding to the shortest starting time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range is located as the optimal starting parameter range of the starter furnace.
[0005] Furthermore, the startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler.
[0006] Furthermore, the method also includes: grouping the optimal startup parameter range at a second sampling interval to obtain multiple subdivided sampling groups; sampling in the multiple subdivided sampling groups respectively to obtain multiple subdivided parameter samples; and determining the optimal startup parameter based on the result of the startup test on each subdivided parameter sample.
[0007] Furthermore, based on the results of the start-up test for each subdivided parameter sample, the optimal start-up parameters are determined, including: performing a start-up test on the starter furnace based on each subdivided parameter sample respectively, obtaining the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under the conditions of each subdivided parameter sample; and determining the subdivided parameter sample corresponding to the shortest start-up time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range as the optimal start-up parameter.
[0008] In a second aspect, an embodiment of the present invention further provides a steam turbine starter furnace parameter matching system, which is applied to a steam turbine combined cycle unit; it includes: an acquisition module, a group sampling module, a test module and a first determination module; wherein the acquisition module is used to obtain the maximum adjustment range of the startup parameters of the starter furnace of the steam turbine combined cycle unit; the group sampling module is used to divide the maximum adjustment range into multiple sampling groups based on a first sampling interval, and sample in each sampling group to obtain multiple parameter samples; the test module is used to perform a startup test on the starter furnace based on each parameter sample, respectively, to obtain the metal temperature, body expansion difference level and startup time of the steam turbine combined cycle unit at different positions when the starter furnace is started under the conditions of each parameter sample; the first determination module is used to determine the sampling group where the parameter sample corresponding to the shortest startup time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range is located as the optimal startup parameter range of the starter furnace.
[0009] Furthermore, the startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler.
[0010] Furthermore, it also includes: a second determination module, which is used to: group the optimal startup parameter range according to a second sampling interval to obtain multiple subdivided sampling groups; sample in the multiple subdivided sampling groups respectively to obtain multiple subdivided parameter samples; and determine the optimal startup parameter based on the result of the startup test on each subdivided parameter sample.
[0011] Furthermore, the second determination module is also used to: perform a start-up test on the starter furnace based on each subdivided parameter sample, respectively, to obtain the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions of the starter furnace when the starter furnace is started under the conditions of each subdivided parameter sample; and determine the subdivided parameter sample corresponding to the shortest start-up time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range as the optimal start-up parameter.
[0012] In a third aspect, an embodiment of the present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method provided in the embodiment of the present invention when executing the computer program.
[0013] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method provided in the embodiment of the present invention is implemented.
[0014] The present invention provides a method and system for matching the parameters of a steam turbine starter furnace. By optimizing the matching relationship of the starting parameters of the starter furnace of a steam turbine combined cycle unit, the starting parameters and the load increase rate are improved within an allowable expansion difference level and an allowable metal temperature range, thereby ultimately achieving the purpose of shortening the starting time, improving the unit's operating efficiency, and alleviating the technical problem of slow starting speed of the combined cycle unit existing in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] In order to more clearly illustrate the implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0016] Figure 1 A flow chart of a method for matching parameters of a steam turbine starter boiler provided by an embodiment of the present invention;
[0017] Figure 2 A schematic diagram of a steam turbine starter boiler parameter matching system provided in an embodiment of the present invention. DETAILED DESCRIPTION
[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0019] Embodiment 1
[0020] Figure 1 1 is a flow chart of a method for matching parameters of a steam turbine starter boiler according to an embodiment of the present invention, and the method is applied to a steam turbine combined cycle unit. Figure 1 As shown, the method specifically comprises the following steps:
[0021] Step S102, obtaining the maximum adjustment range of the start-up parameters of the starter boiler of the steam turbine combined cycle unit.
[0022] Step S104: dividing the maximum adjustment range into a plurality of sampling groups based on the first sampling interval, and performing sampling in each sampling group to obtain a plurality of parameter samples.
[0023] Step S106, performing a start-up test on the starter furnace based on each parameter sample, respectively, to obtain the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under each parameter sample condition.
[0024] Step S108, determining the sampling group containing the parameter samples corresponding to the shortest starting time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range as the optimal starting parameter range for starting the furnace.
[0025] Specifically, the startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler. In an optional implementation provided by an embodiment of the present invention, the sampling group division method in step S104 includes: dividing the outlet main steam pressure into a group every 0.5MPa, sampling every 5°C under the same group of pressures, sampling the same parameter sample multiple times, and removing parameter samples with obvious deviations to avoid distortion of results due to data contingency.
[0026] In an optional implementation manner provided by the embodiment of the present invention, after step S108, the method provided by the embodiment of the present invention further includes the following steps:
[0027] Step S110, performing second sampling interval grouping on the optimal startup parameter range to obtain a plurality of subdivided sampling groups;
[0028] Step S112, sampling is performed in a plurality of subdivided sampling groups respectively to obtain a plurality of subdivided parameter samples;
[0029] Step S114, determining the optimal startup parameters based on the results of the startup test for each subdivided parameter sample.
[0030] Wherein, step S114 also includes the following steps:
[0031] Based on each subdivided parameter sample, a start-up test is performed on the starter furnace to obtain the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under each subdivided parameter sample condition;
[0032] The subdivided parameter samples corresponding to the shortest start-up time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range are determined as the optimal start-up parameters.
[0033] Specifically, in the method provided in an embodiment of the present invention, first, within the maximum adjustment range of the startup parameters, sampling groups are divided according to the first sampling interval, and then a startup test is performed by the control variable method to determine the optimal startup parameter range; then, the optimal startup parameter range is grouped into small spans based on the second sampling interval to obtain subdivided sampling groups, and a startup test is performed again by the control variable method to finally determine the optimal startup parameters.
[0034] From the above description, it can be seen that the present invention provides a method for matching the parameters of a steam turbine starter furnace, which optimizes the starting parameter matching relationship of the starter furnace of the steam turbine combined cycle unit, improves the starting parameters and the load increase rate within the allowable expansion difference level and the allowable metal temperature range, and ultimately achieves the purpose of shortening the starting time, improves the unit operation efficiency, and alleviates the technical problem of slow starting speed of the combined cycle unit existing in the prior art.
[0035] Embodiment 2
[0036] Figure 2 Schematic diagram of a steam turbine starter boiler parameter matching system provided according to an embodiment of the present invention, which is applied to a steam turbine combined cycle unit. Figure 2 As shown, the system includes: an acquisition module 10, a group sampling module 20, a test module 30 and a first determination module 40.
[0037] Specifically, the acquisition module 10 is used to obtain the maximum adjustment range of the startup parameters of the startup boiler of the steam turbine combined cycle unit; wherein the startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler;
[0038] A group sampling module 20, for dividing the maximum adjustment range into a plurality of sampling groups based on a first sampling interval, and performing sampling in each sampling group to obtain a plurality of parameter samples;
[0039] The test module 30 is used to perform a start-up test on the starter furnace based on each parameter sample, and obtain the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under each parameter sample condition;
[0040] The first determination module 40 is used to determine the sampling group of parameter samples corresponding to the shortest startup time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range as the optimal startup parameter range for starting the furnace.
[0041] Specifically, Figure 2 As shown, the system further includes: a second determination module 50, configured to:
[0042] The optimal startup parameter range is grouped into second sampling intervals to obtain a plurality of subdivided sampling groups;
[0043] Sampling is performed in a plurality of subdivision sampling groups respectively to obtain a plurality of subdivision parameter samples;
[0044] Based on the results of the start-up test for each segmented parameter sample, the optimal start-up parameters are determined.
[0045] Specifically, the second determining module 50 is further configured to:
[0046] Based on each subdivided parameter sample, a start-up test is performed on the starter furnace to obtain the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under each subdivided parameter sample condition;
[0047] The subdivided parameter samples corresponding to the shortest start-up time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range are determined as the optimal start-up parameters.
[0048] The present invention further provides an electronic device, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method provided in the embodiment of the present invention when executing the computer program.
[0049] The present invention also provides a computer-readable storage medium, which stores computer instructions. When the computer instructions are executed by a processor, the method provided in the embodiment of the present invention is implemented.
[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. A method for matching parameters of a steam turbine starter boiler, characterized in that: Applicable to steam turbine combined cycle units; including: Obtaining a maximum adjustment range of a startup parameter of a starter boiler of the steam turbine combined cycle unit; Dividing the maximum adjustment range into a plurality of sampling groups based on a first sampling interval, and performing sampling in each sampling group to obtain a plurality of parameter samples; Performing a start-up test on the starter furnace based on each parameter sample respectively, and obtaining the metal temperature of the steam turbine combined cycle unit at different positions, the body expansion difference level and the start-up time of the starter furnace when the starter furnace is started under each parameter sample condition; The sampling group containing the parameter samples corresponding to the shortest starting time under the condition that the metal temperature and the body expansion difference level do not exceed the preset range is determined as the optimal starting parameter range of the starter furnace.
2. The method according to claim 1, characterized in that: The startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler.
3. The method according to claim 1, characterized in that: The method further comprises: performing a second sampling interval grouping on the optimal startup parameter range to obtain a plurality of subdivided sampling groups; Sampling is performed in the multiple subdivision sampling groups respectively to obtain multiple subdivision parameter samples; Based on the results of the start-up test for each segmented parameter sample, the optimal start-up parameters are determined.
4. The method according to claim 3, characterized in that: Based on the results of the startup test for each subdivided parameter sample, the optimal startup parameters are determined, including: Performing a start-up test on the starter furnace based on each subdivided parameter sample respectively, and obtaining the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under the condition of each subdivided parameter sample; The subdivided parameter sample corresponding to the shortest startup time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range is determined as the optimal startup parameter.
5. A steam turbine starter boiler parameter matching system, characterized in that: Applied to steam turbine combined cycle unit; including: acquisition module, group sampling module, test module and first determination module; wherein, The acquisition module is used to acquire the maximum adjustment range of the startup parameters of the starter boiler of the steam turbine combined cycle unit; The group sampling module is used to divide the maximum adjustment range into a plurality of sampling groups based on a first sampling interval, and perform sampling in each sampling group to obtain a plurality of parameter samples; The test module is used to perform a start-up test on the starter furnace based on each parameter sample, respectively, to obtain the metal temperature of the steam turbine combined cycle unit at different positions, the body expansion difference level and the start-up time of the starter furnace when the starter furnace is started under each parameter sample condition; The first determination module is used to determine the sampling group containing the parameter samples corresponding to the shortest startup time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range as the optimal startup parameter range of the starter furnace.
6. The system according to claim 5, characterized in that: The startup parameters include the outlet main steam pressure and outlet main steam temperature of the startup boiler.
7. The system according to claim 6, characterized in that: Also includes: The second determination module is used for: performing a second sampling interval grouping on the optimal startup parameter range to obtain a plurality of subdivided sampling groups; Sampling is performed in the multiple subdivision sampling groups respectively to obtain multiple subdivision parameter samples; Based on the results of the start-up test for each segmented parameter sample, the optimal start-up parameters are determined.
8. The system according to claim 7, characterized in that: The second determining module is further used for: Performing a start-up test on the starter furnace based on each subdivided parameter sample respectively, and obtaining the metal temperature, body expansion difference level and start-up time of the steam turbine combined cycle unit at different positions when the starter furnace is started under the condition of each subdivided parameter sample; The subdivided parameter sample corresponding to the shortest startup time under the condition that the metal temperature and the body expansion difference level do not exceed a preset range is determined as the optimal startup parameter.
9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 4 when executing the computer program.
10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and when the computer instructions are executed by a processor, the method according to any one of claims 1 to 4 is implemented.