Improved method, system and device for selection of small turbine admission parameter measuring point

Abstract

The application discloses an improved method, system and device for selection of steam inlet parameter measuring points of a small steam turbine, comprising the following steps: S1, obtaining steam source of the small steam turbine; S2, obtaining parameter measuring points before improvement according to the steam source of the small steam turbine; S3, obtaining reaction time of steam parameters according to the parameter measuring points before improvement; S4, calculating steam parameters required for work of the small steam turbine; S5, calculating steam parameters required for work of the small steam turbine after improvement of the parameter measuring points; and S6, comparing steam parameter data before improvement with steam parameter data after improvement, and completing the improvement of selection of the steam inlet parameter measuring points of the small steam turbine. The application can realize the improvement of selection of the steam inlet parameter measuring points of the small steam turbine, realize advanced control of the rotating speed of the small steam turbine, and greatly solve the rotating speed fluctuation problem caused by linkage of high and low regulating valves.

Description

Technical Field

[0001] This invention relates to the field of improving the selection of steam inlet parameter measuring points for small steam turbines, and in particular to an improved method, system, and apparatus for selecting steam inlet parameter measuring points for small steam turbines. Background Technology

[0002] Small steam turbines are crucial auxiliary equipment in thermal power generating units. Their main functions include supplying water to the boiler and providing desuperheating water for the main and reheat steam. Therefore, the operating condition of the small steam turbine directly affects the operating condition of the unit. In China, the steam inlet measuring points of the small steam turbines in 330MW units are all selected before the low-pressure steam inlet regulating valve. Since there is a linkage between the low-pressure and high-pressure regulating valves of the small steam turbine, the steam source pressure of the small steam turbine decreases after the unit enters low load. If the measuring point is not selected properly, it will cause large fluctuations in the speed of the small steam turbine and make it difficult to control the steam drum water level or feedwater flow. Summary of the Invention

[0003] The purpose of this invention is to provide an improved method, system, and apparatus for selecting steam inlet parameter measuring points for small steam turbines, aiming to improve the selection of steam inlet parameter measuring points for small steam turbines.

[0004] This invention provides an improved method for selecting measuring points for steam inlet parameters of a small steam turbine, comprising:

[0005] S1. Obtain steam source for the small steam turbine;

[0006] S2. Obtain the parameter measurement points before the improvement based on the steam source of the small steam turbine;

[0007] S3. Obtain the reaction time of steam parameters based on the parameter measuring points before the improvement;

[0008] S4. Calculate the steam parameters required for the small steam turbine to do work;

[0009] S5. After improving the parameter measuring points, calculate the steam parameters required for the small steam turbine to do work.

[0010] S6. Compare the steam parameter data before and after the improvement to improve the selection of steam inlet parameter measurement points for the small steam turbine.

[0011] This invention also provides an improved system for selecting measurement points for steam inlet parameters of a small steam turbine, comprising:

[0012] Acquisition module: used to acquire the steam source for the small steam turbine;

[0013] The original module: used to obtain the parameter measurement points before the improvement based on the steam source of the small steam turbine;

[0014] Reaction time module: Used to obtain the reaction time of steam parameters based on the parameter measurement points before the improvement;

[0015] Calculation module: Used to calculate the steam parameters required for the small steam turbine to do work;

[0016] Improved module: Used to calculate the steam parameters required for the small steam turbine to do work after improving the parameter measuring points;

[0017] The completion module is used to compare the steam parameter data before and after the improvement, and to improve the selection of the steam inlet parameter measurement points for the small steam turbine.

[0018] This invention also provides an improved device for selecting steam inlet parameter measurement points for a small steam turbine, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the above method.

[0019] This invention also provides a computer-readable storage medium storing an information transmission implementation program, which, when executed by a processor, implements the steps of the above-described method.

[0020] By employing the embodiments of the present invention, the present invention can improve the selection of steam inlet parameter measurement points for small steam turbines, realize advanced control of the speed of small steam turbines, and largely solve the problem of speed fluctuation caused by high and low voltage gate linkage.

[0021] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a flowchart of an improved method for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the steam source and measuring point distribution before the improvement;

[0025] Figure 3 This is a schematic diagram of the improved steam source and measurement point distribution of the improved method for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of an improved system for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of an improved device for selecting steam inlet parameter measuring points for a small steam turbine according to an embodiment of the present invention. Detailed Implementation

[0028] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Method Implementation Examples

[0030] According to an embodiment of the present invention, an improved method for selecting measuring points for steam inlet parameters of a small steam turbine is provided. Figure 1 This is a flowchart of an improved method for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention, as shown below. Figure 1 As shown, it specifically includes:

[0031] S1. Obtain steam source for the small steam turbine;

[0032] S1 specifically includes: acquiring the main steam source, high-pressure backup steam source, and debugging steam source.

[0033] Generally, the steam source of a small steam turbine mainly consists of the main steam source (usually the fourth-stage extraction steam connection); the high-pressure standby steam source (usually the cold section reheat steam connection); and the commissioning steam source (usually the auxiliary steam connection). Some units also use the commissioning steam source as the main steam source.

[0034] Figure 2 This is a schematic diagram of the steam source and measuring point distribution before the improvement;

[0035] S2. Obtain the parameter measurement points before the improvement based on the steam source of the small steam turbine;

[0036] S2 specifically includes: selecting temperature and pressure measuring points in front of each electric valve of the main steam source, high-pressure standby steam source and commissioning steam source, and selecting a small steam turbine inlet steam temperature measuring point in front of the main steam valve of the small steam turbine.

[0037] Under normal circumstances, temperature and pressure measuring points are selected in front of the electric valves of the main steam source, high-pressure backup steam source, and commissioning steam source, and the steam inlet temperature measuring point of the small steam turbine is selected in front of the main steam valve of the small steam turbine.

[0038] S3. Obtain the reaction time of steam parameters based on the parameter measuring points before the improvement;

[0039] S4. Calculate the steam parameters required for the small steam turbine to do work;

[0040] Figure 3 This is a schematic diagram of the improved steam source and measurement point distribution of the improved method for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention.

[0041] S5. After improving the parameter measuring points, calculate the steam parameters required for the small steam turbine to do work.

[0042] S5 specifically includes: improving the parameter measurement points to include the pressure and temperature after the main steam valve of the small steam turbine, and calculating the steam parameters required for the small steam turbine to perform work.

[0043] S6. Compare the steam parameter data before and after the improvement to improve the selection of steam inlet parameter measurement points for the small steam turbine.

[0044] Finally, the improved measuring points were incorporated into the small steam turbine speed logic control to achieve advanced control of the small steam turbine speed.

[0045] By selecting the pressure and temperature measurement points for the steam inlet parameters of the small steam turbine after the main steam valve of the small steam turbine, and then referencing these measurement points in the speed logic control of the small steam turbine, the advanced control of the small steam turbine speed is realized, which largely solves the speed fluctuation problem caused by the linkage of high and low valves.

[0046] The improved method for selecting the steam inlet parameter measuring points for this small steam turbine involves selecting the steam source and measuring points through steps S1 and S2, respectively. However, the existing method suffers from several drawbacks. Firstly, there is a distance between the main steam valve and the electric valve connecting the steam source to the small steam turbine, resulting in friction loss. Secondly, the main steam valve is located before the low-pressure inlet regulating valve, causing pressure buildup in the inlet pipe when the low-pressure valve opening is small, hindering the rapid response of the steam parameters required for the turbine's operation. Therefore, steps three through seven are used to improve the measuring points, enabling them to more accurately reflect the steam parameters needed for the turbine's operation and avoiding the lag caused by friction loss and the throttling effect of the low-pressure inlet regulating valve. Integrating this measuring point into the small steam turbine speed logic control significantly reduces speed fluctuations caused by the linkage between the high and low pressure valves, preventing difficulties in controlling the steam drum water level and avoiding unplanned unit shutdowns.

[0047] Finally, the improved measurement point positions were incorporated into the small steam turbine speed logic control, enabling advanced control of the small steam turbine speed and largely solving the speed fluctuation problem caused by high and low gate linkage.

[0048] System Implementation Example 1

[0049] According to embodiments of the present invention, an improved system for selecting measuring points for steam inlet parameters of a small steam turbine is provided. Figure 4 This is a schematic diagram of the improved method system for selecting steam inlet parameter measurement points for a small steam turbine according to an embodiment of the present invention, as shown below. Figure 4 As shown, it specifically includes:

[0050] Acquisition module: used to acquire the steam source for the small steam turbine;

[0051] The original module: used to obtain the parameter measurement points before the improvement based on the steam source of the small steam turbine;

[0052] Reaction time module: Used to obtain the reaction time of steam parameters based on the parameter measurement points before the improvement;

[0053] Calculation module: Used to calculate the steam parameters required for the small steam turbine to do work;

[0054] Improved module: Used to calculate the steam parameters required for the small steam turbine to do work after improving the parameter measuring points;

[0055] The completion module is used to compare the steam parameter data before and after the improvement, and to improve the selection of the steam inlet parameter measurement points for the small steam turbine.

[0056] The acquisition module is specifically used to acquire the main steam source, high-pressure backup steam source, and commissioning steam source.

[0057] Before the improvement, the module was specifically used to select temperature and pressure measuring points in front of each electric valve of the main steam source, high-pressure backup steam source and commissioning steam source, and to select the steam inlet temperature measuring point of the small steam turbine in front of the main steam valve of the small steam turbine.

[0058] The improved module is specifically used to: improve the parameter measurement points to the pressure and temperature after the main steam valve of the small steam turbine, and calculate the steam parameters required for the small steam turbine to do work.

[0059] The embodiments of the present invention are system embodiments corresponding to the above method embodiments. The specific operation of each module can be understood by referring to the description of the method embodiments, and will not be repeated here.

[0060] Device Example 1

[0061] This invention provides an improved system for selecting measurement points for steam inlet parameters of a small steam turbine, such as... Figure 5 As shown, it includes: a memory 50, a processor 52, and a computer program stored on the memory 50 and executable on the processor 52. When the computer program is executed by the processor, it implements the steps in the above method embodiments.

[0062] Device Example 2

[0063] This invention provides a computer-readable storage medium storing an information transmission implementation program, which, when executed by a processor 52, implements the steps described in the above method embodiments.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions to the technical solutions of the embodiments of the present invention do not cause the essence of the corresponding technical solutions to deviate from the scope of the present solution.

Claims

1. An improved method for selecting measuring points for steam inlet parameters of a small steam turbine, characterized in that, include: S1. Obtain steam source for the small steam turbine; S2. Obtain the parameter measurement points before the improvement based on the steam source of the small steam turbine, specifically including: selecting temperature and pressure measurement points in front of each electric valve of the main steam source, high-pressure standby steam source and commissioning steam source, and selecting the steam inlet temperature measurement point of the small steam turbine in front of the main steam valve of the small steam turbine. S3. Obtain the reaction time of steam parameters based on the parameter measuring points before the improvement; S4. Calculate the steam parameters required for the small steam turbine to do work; S5. After improving the parameter measuring points, calculate the steam parameters required for the small steam turbine to do work. Specifically, the improved parameter measuring points are the pressure and temperature after the main steam valve of the small steam turbine. Calculate the steam parameters required for the small steam turbine to do work. S6. Compare the steam parameter data before and after the improvement to improve the selection of steam inlet parameter measurement points for the small steam turbine.

2. The method according to claim 1, characterized in that, S1 specifically includes: acquiring the main steam source, the high-pressure backup steam source, and the debugging steam source.

3. An improved system for selecting measuring points for steam inlet parameters of a small steam turbine, characterized in that, include: Acquisition module: Used to acquire the steam source for the small steam turbine; Before improvement module: Used to obtain parameter measurement points before improvement based on the steam source of small steam turbine, specifically including: selecting temperature and pressure measurement points in front of each electric valve of the main steam source, high pressure backup steam source and commissioning steam source, and selecting steam inlet temperature measurement point of small steam turbine in front of the main steam valve of small steam turbine; Reaction time module: Used to obtain the reaction time of steam parameters based on the parameter measurement points before the improvement; Calculation module: Used to calculate the steam parameters required for the small steam turbine to do work; Improved module: Used to calculate the steam parameters required for the small steam turbine to do work after improving the parameter measuring points. Specifically, the improved parameter measuring points are the pressure and temperature after the main steam valve of the small steam turbine, and the steam parameters required for the small steam turbine to do work are calculated. The completion module is used to compare the steam parameter data before and after the improvement, and to improve the selection of the steam inlet parameter measurement points for the small steam turbine.

4. The system according to claim 3, characterized in that, The acquisition module is specifically used to acquire the main steam source, the high-pressure backup steam source, and the debugging steam source.

5. An improved device for selecting measuring points for steam inlet parameters of a small steam turbine, characterized in that, include: The memory, the processor, and the computer program stored in the memory and executable on the processor, wherein the computer program, when executed by the processor, implements the steps of the improved method for selecting the steam inlet parameter measurement points of a small steam turbine as described in any one of claims 1 to 2.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores an information transmission implementation program, which, when executed by a processor, implements the steps of the improved method for selecting steam inlet parameter measuring points for a small steam turbine as described in any one of claims 1 to 2.

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