State analysis method and system for water seal part of steam turbine

Abstract

The invention discloses a state analysis method and system for a water seal part of a steam turbine, relates to the technical field of state monitoring of the steam turbine, and particularly discloses a method and system for constructing a first water seal part state analysis data set and a second water seal part state analysis data set and aiming at the structure of the water seal part of a shaft seal of the steam turbine. A virtual steam turbine shaft seal and water seal three-dimensional model is constructed and generated, according to the first water seal part state analysis data set and the second water seal part state analysis data set, the virtual steam turbine shaft seal and water seal three-dimensional model is driven to conduct state simulation, and a plurality of steam turbine shaft seal and water seal state display models are generated; and determining a plurality of steam turbine shaft seal and water seal state display models for display based on the mapping relation of the state factor data in the state analysis data set. According to the technical scheme, the determination of the state of the steam turbine shaft seal and water seal is realized, and the state of the steam turbine shaft seal and water seal is displayed to a worker in a mode of the steam turbine shaft seal and water seal state display model; and the working personnel can conveniently formulate a solution.

Description

Technical Field

[0001] The invention relates to the technical field of steam turbine state monitoring, and in particular to a state analysis method and system for a steam turbine water seal part. Background Art

[0002] The condition analysis of the steam turbine shaft seal is a key maintenance and performance monitoring task to ensure the normal operation of the shaft seal system and prevent potential failures. The shaft seal is a key component in the steam turbine, used to prevent steam leakage, provide lubrication and cooling, and ensure the reliability of the equipment. In order to maintain the effectiveness of the shaft seal, its condition must be regularly monitored and evaluated.

[0003] During the continuous operation of the steam turbine shaft seal water seal, problems such as the influence of the unit's operating status or a drop in water pressure may occur, which may lead to damage to the shaft seal water seal. In order to avoid further damage to the water seal, the conventional method may be to dismantle the U-shaped water seal to inspect the water seal. However, if the above problems are encountered every time, it is necessary to dismantle the water seal, which will have a serious negative impact on the power generation of the unit. Therefore, there is an urgent need for an analysis method and system that can determine the status of the water seal without dismantling the shaft seal. Summary of the invention

[0004] The object of the present invention is to provide an analysis method and system capable of determining the state of a water seal portion without disassembling the shaft seal.

[0005] The present application discloses a method for analyzing the state of a steam turbine water seal, comprising:

[0006] A simulation verification test is constructed for the water seal part of the shaft seal of the steam turbine, and water seal state reference data and unit state reference data are collected, and a first water seal part state analysis data set is constructed based on the water seal state reference data and the unit state reference data;

[0007] Analyze the past steam turbine maintenance log and steam turbine operation log, determine the water seal abnormality record, and determine the steam turbine operation status record in the first preset time period, and construct a second water seal status analysis data set;

[0008] According to the structure of the water seal part of the steam turbine shaft seal, a virtual steam turbine shaft seal water seal three-dimensional model is constructed and generated;

[0009] According to the first water seal part state analysis data set and the second water seal part state analysis data set, a virtual steam turbine shaft seal water seal three-dimensional model is driven to perform state simulation to generate a plurality of steam turbine shaft seal water seal state display models;

[0010] The mapping relationship between the real-time state factor data of the steam turbine and the first water seal part state analysis data set is obtained, and several steam turbine shaft seal water seal state display models for display are determined.

[0011] In some embodiments of the present application, a method for constructing a simulation verification test for a water seal portion of a shaft seal of a steam turbine includes:

[0012] Establish multiple groups of verification tests for the water seal part of the steam turbine shaft seal, each group of verification tests includes multiple secondary verification tests of equivalent water seal pressure or equivalent water seal pressure fluctuation, and each group of secondary verification tests includes multiple groups of tertiary verification tests of steam pressure change characteristics within the unit;

[0013] For each third-level verification test, the water seal pressure data, water seal pressure fluctuation data, unit steam pressure change characteristic data and the structural characteristics of the water seal part of the turbine shaft seal are collected and associated to generate several test reference data groups, and the first water seal part status analysis data set is constructed.

[0014] In some embodiments of the present application, a method for constructing a second water seal portion state analysis data set includes:

[0015] Analyze past steam turbine maintenance logs to determine abnormal water seal structure and water seal pressure records;

[0016] Determine the first time node marked in the water seal structure abnormality record data and the water seal pressure abnormality record data, and use the first time node as a reference time node in the steam turbine operation log to select the first steam pressure change feature of the steam pressure in the unit within a first preset time period before the first time node;

[0017] The first steam pressure change characteristics, the water seal structure abnormality record data and the water seal pressure abnormality record data are associated to generate several past record reference data groups, and a second water seal state analysis data set is constructed.

[0018] In some embodiments of the present application, a method for driving a virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to a first water seal part state analysis data set and a second water seal part state analysis data set includes:

[0019] Extract all reference data sets from the first water seal part state analysis data set and the second water seal part state analysis data set;

[0020] Based on the water seal pressure data, water seal pressure fluctuation and unit steam pressure change characteristic data in each reference data group, the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model is determined, and based on the water seal structure abnormality data in the reference data group, the virtual steam turbine shaft seal water seal three-dimensional model is marked to generate a turbine shaft seal water seal status display model.

[0021] In some embodiments of the present application, based on the water seal pressure data, water seal pressure fluctuation data and unit steam pressure change characteristic data in each reference data group, a method for determining the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model includes:

[0022] According to the water seal pressure data and water seal pressure fluctuation data in the reference data group, the water seal part of the virtual steam turbine shaft seal water seal three-dimensional model is represented by color intensity, and the color intensity changes over time;

[0023] According to the characteristic data of the steam pressure change of the unit, the steam pressure expression block on the unit side of the virtual steam turbine shaft seal water seal three-dimensional model is expressed in color intensity, and the color intensity changes over time.

[0024] In some embodiments of the present application, a method for determining a plurality of steam turbine shaft seal water seal state display models for display includes:

[0025] Compare the real-time state factor data with each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set to determine a number of reference data sets that meet the relevance standard;

[0026] Several turbine shaft seal water seal status display models corresponding to the reference data sets that meet the relevance criteria are selected for display.

[0027] In some embodiments of the present application, a method for determining a number of reference data sets that meet a relevance standard includes:

[0028] A front-correlation cut-off interval and a rear-correlation cut-off interval are set for each reference state factor data in each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set;

[0029] If all real-time status factor data at the same time node meet the range requirements of the corresponding pre-correlation cutoff interval and post-correlation cutoff interval in a reference factor data set, then the reference factor data set is deemed to be a reference factor data set that meets the relevance standard.

[0030] In some embodiments of the present application, the state analysis method further includes:

[0031] Determine the order of the reference factor data set according to the state factor difference between all the real-time state factor data and each reference state factor data in the reference factor data set;

[0032] Based on the sorting of the reference factor data sets, the turbine shaft seal water seal status display model is determined with priority.

[0033] In some embodiments of the present application, a method for determining a ranking of a reference factor data set includes:

[0034] According to the size of the pre-association cut-off interval and the post-association cut-off interval set for each reference state factor data in the reference factor data set, a priority weight is configured for the state factor difference amount corresponding to the reference state factor data;

[0035] Based on the corresponding differences of all state factors in the reference factor data set and their respective priority weights, the priority value of the reference factor data set is obtained;

[0036] sorting the reference factor data sets based on the priority values ​​of the reference factor data sets;

[0037] The expression for calculating the priority value of the reference factor data set is:

[0038]

[0039] Where y is the priority value of the reference factor data set, Δx n is the state factor difference between the nth real-time state factor data and the reference state factor data, k n is the priority weight corresponding to the state factor difference between the nth real-time state factor data and the reference state factor data.

[0040] In some embodiments of the present application, a state analysis system for a steam turbine water seal is also disclosed, including:

[0041] A data set management module is used to construct a simulation verification test for the water seal part of the shaft seal of the steam turbine, and collect water seal state reference data and unit state reference data, and construct a first water seal part state analysis data set based on the water seal state reference data and the unit state reference data, analyze the past steam turbine maintenance log and steam turbine operation log, determine the water seal abnormality record, and determine the steam turbine operation state record in the first preset time period before, and construct a second water seal part state analysis data set;

[0042] A three-dimensional model generation module is used to construct and generate a virtual steam turbine shaft seal water seal three-dimensional model according to the structure of the water seal part of the steam turbine shaft seal, and drive the virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to the first water seal part state analysis data set and the second water seal part state analysis data set, so as to generate a number of steam turbine shaft seal water seal state display models;

[0043] The three-dimensional model analysis module is used to obtain the mapping relationship between the real-time state factor data of the steam turbine and the first water seal state analysis data set and the second water seal state analysis data set, and determine several steam turbine shaft seal water seal state display models for display.

[0044] The present application discloses a state analysis method and system for a steam turbine water seal part, and relates to the technical field of steam turbine state monitoring. Specifically, the present application discloses constructing a first water seal part state analysis data set and a second water seal part state analysis data set, and constructing and generating a virtual steam turbine shaft seal water seal three-dimensional model for the structure of the water seal part of the steam turbine shaft seal. According to the first water seal part state analysis data set and the second water seal part state analysis data set, the virtual steam turbine shaft seal water seal three-dimensional model is driven to perform state simulation, and a number of steam turbine shaft seal water seal state display models are generated. Based on the mapping relationship between the state factor data in the state analysis data set, a number of steam turbine shaft seal water seal state display models for display are determined. Through the above-mentioned technical scheme, the present application realizes the determination of the state of the steam turbine shaft seal water seal, and displays it to the staff in the form of a steam turbine shaft seal water seal state display model, so as to facilitate the staff to formulate solutions.

[0045] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 This is a method step diagram of a method for analyzing the state of a water seal portion of a steam turbine disclosed in this application. DETAILED DESCRIPTION

[0047] The technical solution of the present invention is further described below through the accompanying drawings and embodiments.

[0048] The following will be combined with the accompanying drawings and specific embodiments to clearly and completely describe the technical solution of the present invention. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art in this field can make some non-essential improvements and adjustments based on the content of the present invention described below. In the present invention, unless otherwise clearly specified and limited, the technical terms used in this application should be the common meanings understood by the technical personnel of the present invention.

[0049] Example:

[0050] The object of the present invention is to provide an analysis method and system capable of determining the state of a water seal portion without disassembling the shaft seal.

[0051] This application discloses a method for analyzing the status of a steam turbine water seal. Figure 1 ,include:

[0052] Step S100, constructing a simulation verification test for the water seal part of the steam turbine shaft seal, collecting water seal state reference data and unit state reference data, and constructing a first water seal part state analysis data set based on the water seal state reference data and the unit state reference data.

[0053] It should be understood that in this step, the water seal part of the steam turbine shaft seal is constructed. Water seal state reference data and unit state reference data are collected and used to construct the first water seal part state analysis data set to understand the normal working state of the water seal.

[0054] Step S200, analyzing past steam turbine maintenance logs and steam turbine operation logs, determining water seal abnormality records, and determining steam turbine operation status records in the first preset time period, and constructing a second water seal status analysis data set.

[0055] It is important to understand that in this step, past turbine inspection logs and operation logs will be analyzed. The goal is to identify abnormal records of the water seal and find the turbine operating status records for the first preset time period. This will help build the second water seal status analysis data set to identify potential problems and abnormal conditions.

[0056] Step S300: construct and generate a virtual steam turbine shaft seal water seal three-dimensional model based on the structure of the steam turbine shaft seal water seal portion.

[0057] It should be understood that in this step, a 3D model of the virtual turbine shaft seal water seal will be created. This model can be used to simulate and analyze the structure of the water seal.

[0058] Step S400: driving a virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to the first water seal part state analysis data set and the second water seal part state analysis data set, and generating a plurality of steam turbine shaft seal water seal state display models.

[0059] It should be understood that this step involves simulating the state of the virtual steam turbine shaft seal water seal using the first and second water seal state analysis data sets. These data will be used to generate several steam turbine shaft seal water seal state display models to visualize water seal problems under different states.

[0060] Step S500, obtaining a mapping relationship between the real-time status factor data of the steam turbine in the first water seal part status analysis data set and the second water seal part status analysis data set, and determining a plurality of steam turbine shaft seal water seal status display models for display.

[0061] It should be understood that this step is to obtain real-time steam turbine state factor data and map it to the corresponding models in the first and second water seal state analysis data sets, which will help determine the steam turbine shaft seal water seal state display model for display to monitor the state of the water seal in real time.

[0062] In some embodiments of the present application, a method for constructing a simulation verification test for a water seal portion of a shaft seal of a steam turbine includes:

[0063] The first step is to establish multiple groups of verification tests for the water seal part of the turbine shaft seal. Each group of verification tests includes multiple secondary verification tests with equivalent water seal pressure or equivalent water seal pressure fluctuations. Each group of secondary verification tests includes multiple groups of tertiary verification tests with steam pressure change characteristics within the unit.

[0064] In the second step, for each third-level verification test, the water seal pressure data, water seal pressure fluctuation data, unit steam pressure change characteristic data and the structural characteristics of the water seal part of the turbine shaft seal are collected and associated to generate several test reference data groups, and construct the first water seal part status analysis data set.

[0065] The above technical solution can be understood according to the following technical ideas:

[0066] (1) Establish multiple groups of validation tests:

[0067] First, it is necessary to create multiple groups of verification tests, which are used to verify the shaft seal water seal of the steam turbine. Each group of verification tests should include multiple secondary verification tests with equal water seal pressure or equal water seal pressure fluctuation.

[0068] (2) Secondary verification test:

[0069] In each set of verification tests, multiple secondary verification tests with equal water seal pressure or equal water seal pressure fluctuation are carried out. These tests can simulate the state of the water seal under different working conditions, including pressure and pressure fluctuation.

[0070] (3) Level 3 verification test:

[0071] In each set of second-level verification tests, multiple sets of third-level verification tests of the steam pressure variation characteristics within the unit are carried out. These tests are designed to simulate the water seal state under different steam pressure conditions when the turbine is running.

[0072] (4) Data collection and association:

[0073] During each Level 3 validation test, the following data are collected:

[0074] Water seal pressure data: record the pressure changes of the water seal.

[0075] Water seal pressure fluctuation data: measure the fluctuation characteristics of water seal pressure.

[0076] Unit steam pressure change characteristic data: record the change characteristics of the steam pressure in the unit.

[0077] Structural features of the water seal part of the turbine shaft seal.

[0078] (5) Generate test reference data set:

[0079] The above collected data are associated to generate several test reference data groups, which include water seal status data and structural feature data, and are used to analyze the status of the water seal.

[0080] (6) Construct the first water seal state analysis data set:

[0081] The generated test reference data set is used to construct the first water seal state analysis data set. This data set will contain the state data of the water seal under different working conditions and can be used to further analyze and monitor the state of the water seal.

[0082] In some embodiments of the present application, a method for constructing a second water seal portion state analysis data set includes:

[0083] The first step is to analyze past turbine maintenance logs to determine the abnormal water seal structure record data and water seal pressure record data.

[0084] The second step is to determine the first time node marked in the water seal structure abnormality record data and the water seal pressure abnormality record data, and use the first time node as the reference time node in the turbine operation log to select the first steam pressure change feature of the steam pressure in the unit within the first preset time period before the first time node.

[0085] The third step is to associate the first steam pressure change characteristics, the water seal structure abnormality record data and the water seal pressure abnormality record data to generate several past record reference data groups and construct a second water seal state analysis data set.

[0086] For the above technical solution, we can understand it from the following technical ideas:

[0087] Step 1: Analyze the maintenance log In this step, the past turbine maintenance logs are analyzed to determine the abnormal water seal structure and water seal pressure records. These records can include information on water seal maintenance, repair, replacement, and pressure changes.

[0088] Step 2: Determine abnormal records and time nodes In this step, it is necessary to mark the records of water seal structure abnormality and water seal pressure abnormality from the abnormal record data, and determine the first time node related to these records. The first time node corresponds to the time point when the water seal problem occurs or is noticed. Then, it is necessary to use the first time node as the reference time node in the turbine operation log and select the first steam pressure change feature of the steam pressure in the unit within the first preset time period before the first time node.

[0089] Step 3: Associate data and build a data set In this step, the first steam pressure change characteristics, water seal structure abnormality record data, and water seal pressure abnormality record data are associated. The first time node will be used as the association point to bring these data together to generate several past record reference data sets. This data set will include abnormal records of water seal problems, steam pressure change characteristics related to these problems, and other possible related information.

[0090] In some embodiments of the present application, a method for driving a virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to a first water seal part state analysis data set and a second water seal part state analysis data set includes:

[0091] In the first step, all reference data sets are extracted from the first water seal part state analysis data set and the second water seal part state analysis data set.

[0092] In the second step, based on the water seal pressure data, water seal pressure fluctuation and unit steam pressure change characteristic data in each reference data group, the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model is determined, and based on the water seal structure abnormality data in the reference data group, the virtual steam turbine shaft seal water seal three-dimensional model is marked to generate a turbine shaft seal water seal status display model.

[0093] In some embodiments of the present application, based on the water seal pressure data, water seal pressure fluctuation data and unit steam pressure change characteristic data in each reference data group, a method for determining the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model includes:

[0094] In the first step, for the water seal pressure data and water seal pressure fluctuation data in the reference data group, the water seal part of the virtual steam turbine shaft seal water seal three-dimensional model is represented by color intensity, and the color intensity changes over time.

[0095] In the second step, based on the unit steam pressure change characteristic data, the steam pressure expression block on the unit side of the virtual steam turbine shaft seal water seal three-dimensional model is expressed in color intensity, and the color intensity changes over time.

[0096] In some embodiments of the present application, a method for determining a plurality of steam turbine shaft seal water seal state display models for display includes:

[0097] In the first step, the real-time state factor data is compared with each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set to determine a number of reference data sets that meet the relevance standard.

[0098] In the second step, several turbine shaft seal water seal status display models corresponding to the reference data sets that meet the relevance criteria are screened out for display.

[0099] In some embodiments of the present application, a method for determining a number of reference data sets that meet a relevance standard includes:

[0100] In the first step, a front-correlation cutoff interval and a rear-correlation cutoff interval are set for each reference state factor data in each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set.

[0101] In the second step, if all real-time status factor data at the same time node meet the range requirements of the corresponding pre-correlation cutoff interval and post-correlation cutoff interval in a reference factor data set, then the reference factor data set is identified as a reference factor data set that meets the relevance standard.

[0102] In some embodiments of the present application, the state analysis method further includes:

[0103] In the first step, the order of the reference factor data set is determined according to the difference in state factors between all real-time state factor data and each reference state factor data in the reference factor data set.

[0104] In the second step, based on the sorting of the reference factor data sets, the turbine shaft seal water seal status display model is determined with priority.

[0105] In some embodiments of the present application, a method for determining a ranking of a reference factor data set includes:

[0106] In the first step, according to the size of the pre-association cut-off interval and the post-association cut-off interval set for each reference state factor data in the reference factor data set, a priority weight is configured for the state factor difference amount corresponding to the reference state factor data.

[0107] In the second step, based on the corresponding differences of all state factors in the reference factor data set and their respective priority weights, the priority value of the reference factor data set is obtained.

[0108] The third step is to sort the reference factor data sets based on their priority values.

[0109] The expression for calculating the priority value of the reference factor data set is:

[0110]

[0111] Where y is the priority value of the reference factor data set, Δx n is the state factor difference between the nth real-time state factor data and the reference state factor data, k n is the priority weight corresponding to the state factor difference between the nth real-time state factor data and the reference state factor data.

[0112] In some embodiments of the present application, a state analysis system for a water seal part of a steam turbine is also disclosed, comprising: a data set management module, a three-dimensional model generation module and a three-dimensional model analysis module.

[0113] A data set management module is used to construct a simulation verification test for the water seal part of the shaft seal of the steam turbine, and collect water seal state reference data and unit state reference data, and construct a first water seal part state analysis data set based on the water seal state reference data and the unit state reference data, analyze the past steam turbine maintenance log and steam turbine operation log, determine the water seal abnormality record, and determine the steam turbine operation state record in the first preset time period before, and construct a second water seal part state analysis data set;

[0114] A three-dimensional model generation module is used to construct and generate a virtual steam turbine shaft seal water seal three-dimensional model according to the structure of the water seal part of the steam turbine shaft seal, and drive the virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to the first water seal part state analysis data set and the second water seal part state analysis data set, so as to generate a number of steam turbine shaft seal water seal state display models;

[0115] The three-dimensional model analysis module is used to obtain the mapping relationship between the real-time state factor data of the steam turbine and the first water seal state analysis data set and the second water seal state analysis data set, and determine several steam turbine shaft seal water seal state display models for display.

[0116] Through the description of the above implementation methods, those skilled in the art can clearly understand that the present invention can be implemented by hardware, or by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present invention can be embodied in the form of a software product, which can be stored in a non-volatile storage medium (which can be a CD-ROM, a USB flash drive, a mobile hard disk, etc.), including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each implementation scenario of the present invention.

[0117] The present application discloses a state analysis method and system for a steam turbine water seal part, and relates to the technical field of steam turbine state monitoring. Specifically, the present application discloses constructing a first water seal part state analysis data set and a second water seal part state analysis data set, and constructing and generating a virtual steam turbine shaft seal water seal three-dimensional model for the structure of the water seal part of the steam turbine shaft seal. According to the first water seal part state analysis data set and the second water seal part state analysis data set, the virtual steam turbine shaft seal water seal three-dimensional model is driven to perform state simulation, and a number of steam turbine shaft seal water seal state display models are generated. Based on the mapping relationship between the state factor data in the state analysis data set, a number of steam turbine shaft seal water seal state display models for display are determined. Through the above-mentioned technical scheme, the present application realizes the determination of the state of the steam turbine shaft seal water seal, and displays it to the staff in the form of a steam turbine shaft seal water seal state display model, so as to facilitate the staff to formulate solutions.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can still modify or replace the technical solution of the present invention with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the present invention.

Claims

1. A method for analyzing the state of a steam turbine water seal, characterized in that: include: A simulation verification test is constructed for the water seal part of the shaft seal of the steam turbine, and water seal state reference data and unit state reference data are collected, and a first water seal part state analysis data set is constructed based on the water seal state reference data and the unit state reference data; Analyze the past steam turbine maintenance log and steam turbine operation log, determine the water seal abnormality record, and determine the steam turbine operation status record in the first preset time period, and construct a second water seal status analysis data set; According to the structure of the water seal part of the steam turbine shaft seal, a virtual steam turbine shaft seal water seal three-dimensional model is constructed and generated; According to the first water seal part state analysis data set and the second water seal part state analysis data set, a virtual steam turbine shaft seal water seal three-dimensional model is driven to perform state simulation to generate a plurality of steam turbine shaft seal water seal state display models; The mapping relationship between the real-time state factor data of the steam turbine and the first water seal part state analysis data set is obtained, and several steam turbine shaft seal water seal state display models for display are determined.

2. A method for analyzing the state of a steam turbine water seal according to claim 1, characterized in that: The method for constructing a simulation verification test for the water seal part of the steam turbine shaft seal includes: Establish multiple groups of verification tests for the water seal part of the steam turbine shaft seal, each group of verification tests includes multiple secondary verification tests of equivalent water seal pressure or equivalent water seal pressure fluctuation, and each group of secondary verification tests includes multiple groups of tertiary verification tests of steam pressure change characteristics within the unit; For each third-level verification test, the water seal pressure data, water seal pressure fluctuation data, unit steam pressure change characteristic data and the structural characteristics of the water seal part of the turbine shaft seal are collected and associated to generate several test reference data groups, and the first water seal part status analysis data set is constructed.

3. The method for analyzing the status of a steam turbine water seal according to claim 1, characterized in that: The method for constructing the second water seal state analysis data set includes: Analyze past steam turbine maintenance logs to determine abnormal water seal structure and water seal pressure records; Determine the first time node marked in the water seal structure abnormality record data and the water seal pressure abnormality record data, and use the first time node as a reference time node in the steam turbine operation log to select the first steam pressure change feature of the steam pressure in the unit within a first preset time period before the first time node; The first steam pressure change characteristics, the water seal structure abnormality record data and the water seal pressure abnormality record data are associated to generate several past record reference data groups, and a second water seal state analysis data set is constructed.

4. A method for analyzing the status of a steam turbine water seal according to claim 1, characterized in that: The method of driving a virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to a first water seal part state analysis data set and a second water seal part state analysis data set comprises: Extract all reference data sets from the first water seal part state analysis data set and the second water seal part state analysis data set; Based on the water seal pressure data, water seal pressure fluctuation and unit steam pressure change characteristic data in each reference data group, the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model is determined, and based on the water seal structure abnormality data in the reference data group, the virtual steam turbine shaft seal water seal three-dimensional model is marked to generate a turbine shaft seal water seal status display model.

5. A method for analyzing the status of a steam turbine water seal according to claim 4, characterized in that: The method for determining the dynamic performance state of the virtual steam turbine shaft seal water seal three-dimensional model based on the water seal pressure data, water seal pressure fluctuation data and unit steam pressure change characteristic data in each reference data group includes: According to the water seal pressure data and water seal pressure fluctuation data in the reference data group, the water seal part of the virtual steam turbine shaft seal water seal three-dimensional model is represented by color intensity, and the color intensity changes over time; According to the characteristic data of the steam pressure change of the unit, the steam pressure expression block on the unit side of the virtual steam turbine shaft seal water seal three-dimensional model is expressed in color intensity, and the color intensity changes over time.

6. The method for analyzing the status of a steam turbine water seal according to claim 1, characterized in that: The method for determining several steam turbine shaft seal water seal state display models for display includes: Compare the real-time state factor data with each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set to determine a number of reference data sets that meet the relevance standard; Several turbine shaft seal water seal status display models corresponding to the reference data sets that meet the relevance criteria are selected for display.

7. A method for analyzing the status of a steam turbine water seal according to claim 6, characterized in that: Methods for determining a number of reference data sets that meet the relevance criteria include: A front-correlation cut-off interval and a rear-correlation cut-off interval are set for each reference state factor data in each reference data set in the first water seal part state analysis data set and the second water seal part state analysis data set; If all real-time status factor data at the same time node meet the range requirements of the corresponding pre-correlation cutoff interval and post-correlation cutoff interval in a reference factor data set, then the reference factor data set is deemed to be a reference factor data set that meets the relevance standard.

8. A method for analyzing the status of a steam turbine water seal according to claim 7, characterized in that: The state analysis method further comprises: Determine the order of the reference factor data set according to the state factor difference between all the real-time state factor data and each reference state factor data in the reference factor data set; Based on the sorting of the reference factor data sets, the turbine shaft seal water seal status display model is determined with priority.

9. A method for analyzing the status of a steam turbine water seal according to claim 8, characterized in that: Methods for determining the ranking of a reference factor data set include: According to the size of the pre-association cut-off interval and the post-association cut-off interval set for each reference state factor data in the reference factor data set, a priority weight is configured for the state factor difference amount corresponding to the reference state factor data; Based on the corresponding differences of all state factors in the reference factor data set and their respective priority weights, the priority value of the reference factor data set is obtained; sorting the reference factor data sets based on the priority values ​​of the reference factor data sets; The expression for calculating the priority value of the reference factor data set is: Where y is the priority value of the reference factor data set, Δx n is the state factor difference between the nth real-time state factor data and the reference state factor data, k n is the priority weight corresponding to the state factor difference between the nth real-time state factor data and the reference state factor data.

10. A state analysis system for a steam turbine water seal, characterized in that: include: A data set management module is used to construct a simulation verification test for the water seal part of the shaft seal of the steam turbine, and collect water seal state reference data and unit state reference data, and construct a first water seal part state analysis data set based on the water seal state reference data and the unit state reference data, analyze the past steam turbine maintenance log and steam turbine operation log, determine the water seal abnormality record, and determine the steam turbine operation state record in the first preset time period before, and construct a second water seal part state analysis data set; A three-dimensional model generation module is used to construct and generate a virtual steam turbine shaft seal water seal three-dimensional model according to the structure of the water seal part of the steam turbine shaft seal, and drive the virtual steam turbine shaft seal water seal three-dimensional model to perform state simulation according to the first water seal part state analysis data set and the second water seal part state analysis data set, so as to generate a number of steam turbine shaft seal water seal state display models; The three-dimensional model analysis module is used to obtain the mapping relationship between the real-time state factor data of the steam turbine and the first water seal state analysis data set and the second water seal state analysis data set, and determine several steam turbine shaft seal water seal state display models for display.

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