Real-time monitoring system for safe operation state of steam turbine

Abstract

The invention discloses a steam turbine safe operation state real-time monitoring system, which comprises a monitoring sensor, a control center, a data storage unit and a data display unit, and is characterized in that the control center comprises a data processing module, a fault diagnosis module and an optimization control module. The invention belongs to the technical field of operation monitoring, and particularly provides a method for improving the reliability of a steam turbine, reducing the operation cost and enhancing the monitoring and maintenance of equipment. Through real-time monitoring and data analysis, the system can find and process equipment faults in time, and economic loss and downtime caused by fault expansion are avoided. Meanwhile, the real-time monitoring system for the safe operation state of the steam turbine can also provide a scientific basis for preventive maintenance of equipment, improve the maintenance efficiency of the equipment and prolong the service life of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of operation monitoring, and specifically refers to a real-time monitoring system for the safe operation status of a steam turbine. Background Art

[0002] A steam turbine, also known as a steam turbine engine, is a rotary steam power device. High-temperature and high-pressure steam passes through a fixed nozzle to become an accelerated airflow and is then sprayed onto the blades, causing the rotor with the blade rows to rotate and perform work externally. Steam turbines are the main equipment in modern thermal power plants and are also used in the metallurgical industry, chemical industry, and ship power plants.

[0003] Steam turbines have complex structures and harsh operating environments. The failure rate of steam turbine generator sets is not low. Once a failure occurs, it will cause great economic impact. Analyzing the monitoring data of steam turbines can effectively evaluate the operating status of the system and capture potential fault evolution characteristics. Since the monitoring data of steam turbines has a certain time-varying property, this will cause the new and old data to not meet the same distribution. In addition, the electromechanical system structure of steam turbines is complex and the operating conditions are changeable, which will lead to a wide range of differences between new and old data. The traditional steam turbine operation fault monitoring system judges the fault of the steam turbine by setting normal operating indicators, resulting in frequent missed faults and false alarms, and the monitoring effect is not ideal. Summary of the invention

[0004] In order to solve the above existing problems, the present invention provides a system that improves the reliability of steam turbines, reduces operating costs, and strengthens the monitoring and maintenance of equipment. Through real-time monitoring and data analysis, the system can timely detect and handle equipment failures, avoiding economic losses and downtime caused by the expansion of failures. At the same time, the system can also provide a scientific basis for the preventive maintenance of equipment, improve the maintenance efficiency and service life of the equipment, and provide a real-time monitoring system for the safe operation status of steam turbines.

[0005] The technical solution adopted by the present invention is as follows: The real-time monitoring system for the safe operation status of a steam turbine of the present invention includes a monitoring sensor, a control center, a data storage unit and a data display unit. The control center includes a data processing module, a fault diagnosis module and an optimization control module.

[0006] Furthermore, the monitoring sensor is responsible for collecting various operating parameters of the steam turbine, such as temperature, vibration, rotation speed, lubricating oil pressure, current, etc. The monitoring sensor has the ability to resist harsh operating environments.

[0007] The control center, as the core of the system, is responsible for receiving the processed data and comparing it with the preset threshold value to determine the operating status of the steam turbine. If the parameter exceeds the normal range, the control center will issue an alarm signal or take emergency shutdown measures.

[0008] The data storage unit is used to store and manage the operation data of the steam turbine so as to perform subsequent data analysis and fault diagnosis.

[0009] The data display unit is used to display the real-time operating status, alarm information, historical data, etc. of the steam turbine, which is convenient for operators to monitor and manage.

[0010] Furthermore, the data processing module performs real-time processing and analysis on the operating parameters of the high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder and blades collected by the sensor, including steps such as signal amplification, filtering, and A / D conversion, so as to extract useful information.

[0011] The fault diagnosis module determines the operating status of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades, and determines whether the safety of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades under operating conditions meets the operating monitoring qualification conditions.

[0012] The optimization control module is used to optimize the operation strategy of the in-service steam turbine in response to the operation monitoring qualification condition not being met.

[0013] Furthermore, the operating parameters of the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder of the steam turbine include: changes in cooling steam flow, cooling steam temperature, cooling steam pressure, changes in cylinder extraction parameters, changes in cylinder metal temperature, water spray flow, water spray temperature, water spray pressure, operating status of the nozzle and exhaust pressure.

[0014] Furthermore, the turbine blade operating parameters include: turbine blade temperature signal, pressure signal and load signal.

[0015] Furthermore, the operating status of the high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder, and blades of the steam turbine refers to comparing the acquired operating parameters with the parameter thresholds of the corresponding types to determine whether each operating parameter is out of limit, and then determining the basic operating status of the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder. When a certain operating parameter is out of limit, it is determined that the basic operating status is abnormal, specifically, the operating parameter in the basic operating status is abnormal.

[0016] The beneficial effects achieved by the present invention using the above structure are as follows: The real-time monitoring system for the safe operation status of a turbine proposed in this scheme is based on various state parameters during the operation of the turbine, obtains the changing characteristics during the real-time operation according to the monitoring values, compares the real-time changing characteristics with the fault characteristics, and realizes fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structural diagram of the real-time monitoring system for safe operation status of steam turbine proposed in this scheme;

[0018] Figure 2Schematic diagram of the control center structure of the real-time monitoring system for safe operation status of the turbine proposed in this plan. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] like Figure 1 and Figure 2 As shown, the real-time monitoring system for safe operation status of a steam turbine proposed in this scheme includes a monitoring sensor, a control center, a data storage unit and a data display unit. The control center includes a data processing module, a fault diagnosis module and an optimization control module.

[0021] The monitoring sensor is responsible for collecting various operating parameters of the steam turbine, such as temperature, vibration, rotation speed, lubricating oil pressure, current, etc. The monitoring sensor has the performance of resisting harsh operating environment.

[0022] The control center, as the core of the system, is responsible for receiving the processed data and comparing it with the preset threshold value to determine the operating status of the steam turbine. If the parameter exceeds the normal range, the control center will issue an alarm signal or take emergency shutdown measures.

[0023] The data storage unit is used to store and manage the operation data of the steam turbine so as to perform subsequent data analysis and fault diagnosis.

[0024] The data display unit is used to display the real-time operating status, alarm information, historical data, etc. of the steam turbine, which is convenient for operators to monitor and manage.

[0025] The data processing module processes and analyzes the operating parameters of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades collected by the sensor in real time, including steps such as signal amplification, filtering, and A / D conversion, so as to extract useful information.

[0026] The fault diagnosis module determines the operating status of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades, and determines whether the safety of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades under operating conditions meets the operating monitoring qualification conditions.

[0027] The optimization control module is used to optimize the operation strategy of the in-service steam turbine in response to the failure to meet the operation monitoring qualification condition.

[0028] Among them, the operating parameters of the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder of the steam turbine include: changes in cooling steam flow, cooling steam temperature, cooling steam pressure, changes in cylinder extraction parameters, changes in cylinder metal temperature, water spray flow, water spray temperature, water spray pressure, nozzle operating status and exhaust pressure.

[0029] The turbine blade operating parameters include: turbine blade temperature signal, pressure signal and load signal.

[0030] The operating status of the high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder and blades of the steam turbine refers to comparing the acquired operating parameters with the parameter thresholds of the corresponding types to determine whether each operating parameter is out of limit, and then determining the basic operating status of the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder. When a certain operating parameter is out of limit, it is determined that the basic operating status is abnormal, specifically, the operating parameter in the basic operating status is abnormal.

[0031] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A real-time monitoring system for safe operation status of a steam turbine, characterized in that: It includes a monitoring sensor, a control center, a data storage unit and a data display unit. The control center includes a data processing module, a fault diagnosis module and an optimization control module.

2. A real-time monitoring system for safe operation status of a steam turbine according to claim 1, characterized in that: The monitoring sensor is responsible for collecting various operating parameters of the steam turbine, such as temperature, vibration, rotation speed, lubricating oil pressure, current, etc. The monitoring sensor has the performance of resisting harsh operating environment. The control center, as the core of the system, is responsible for receiving the processed data and comparing it with the preset threshold value to determine the operating status of the steam turbine. If the parameter exceeds the normal range, the control center will issue an alarm signal or take emergency shutdown measures. The data storage unit is used to store and manage the operation data of the steam turbine so as to perform subsequent data analysis and fault diagnosis. The data display unit is used to display the real-time operating status, alarm information, historical data, etc. of the steam turbine, which is convenient for operators to monitor and manage.

3. A real-time monitoring system for safe operation status of a steam turbine according to claim 2, characterized in that: The data processing module processes and analyzes the operating parameters of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades collected by the sensor in real time, including steps such as signal amplification, filtering, and A / D conversion, so as to extract useful information. The fault diagnosis module determines the operating status of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades, and determines whether the safety of the high-pressure cylinder, the medium-pressure cylinder, the low-pressure cylinder, and the blades under operating conditions meets the operating monitoring qualification conditions. The optimization control module is used to optimize the operation strategy of the in-service steam turbine in response to the operation monitoring qualification condition not being met.

4. A real-time monitoring system for safe operation status of a steam turbine according to claim 3, characterized in that: The operating parameters of the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder of the steam turbine include: changes in cooling steam flow, cooling steam temperature, cooling steam pressure, changes in cylinder extraction parameters, changes in cylinder metal temperature, water spray flow, water spray temperature, water spray pressure, operating status of the nozzle and exhaust pressure.

5. A real-time monitoring system for safe operation status of a steam turbine according to claim 3, characterized in that: The turbine blade operating parameters include: turbine blade temperature signal, pressure signal and load signal.

6. A real-time monitoring system for safe operation status of a steam turbine according to claim 3, characterized in that: The operating status of the high-pressure cylinder, medium-pressure cylinder, low-pressure cylinder and blades of the steam turbine refers to comparing the acquired operating parameters with the parameter thresholds of the corresponding types to determine whether each operating parameter is out of limit, and then determining the basic operating status of the high-pressure cylinder, medium-pressure cylinder and low-pressure cylinder. When a certain operating parameter is out of limit, it is determined that the basic operating status is abnormal, specifically, the operating parameter in the basic operating status is abnormal.

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