Hydroelectric generating set temperature measuring system

Abstract

The invention provides a hydroelectric generating set temperature measuring system, which relates to the technical field of hydroelectric, and comprises to-be-measured equipment, a temperature measuring module and a local control module, the to-be-tested equipment is a hydroelectric generating set; the temperature measuring module is arranged in a guide bearing of the hydroelectric generating set and used for collecting temperature data of a bearing bush in the guide bearing and sending the temperature data to the local control module. And the local control module is used for receiving the temperature data and analyzing the temperature data to generate a high-temperature alarm. The temperature of the guide bearing in the hydroelectric generating set is monitored through the temperature measuring module, accurate early warning of the temperature of the hydroelectric generating set is achieved, set faults caused by too high temperature are avoided, and the operation efficiency of the set is improved.

Description

Technical Field

[0001] The present application relates to the field of hydropower technology, and in particular to a temperature measurement system for a hydropower unit. Background Art

[0002] The operating temperature of the relevant components of the hydropower unit is an important non-electrical quantity monitoring parameter in the operation monitoring of the hydropower station. The operating temperature is closely related to the operating status of the unit and the service life of the components, and can directly reflect whether the unit is operating normally and stably. Research on the prediction and early warning methods for the operating temperature of the hydropower unit is of great practical significance for realizing predictive maintenance of equipment and reducing unnecessary losses. However, the temperature monitoring of the components in the hydropower unit is not comprehensive enough. Summary of the invention

[0003] The present application aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, the first objective of the present application is to provide a temperature measurement system for a hydropower unit.

[0005] The second objective of the present application is to provide an electronic device.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a temperature measurement system for a hydropower unit, comprising:

[0007] Equipment under test, temperature measurement module, local control module;

[0008] The equipment to be tested is a hydroelectric unit;

[0009] The temperature measurement module is arranged in the guide bearing of the hydroelectric generator set, and is used to collect the temperature data of the bearing bush in the guide bearing and send it to the local control module;

[0010] The local control module is used to receive the temperature data and analyze the temperature data to generate a high temperature alarm.

[0011] Optionally, the temperature measurement module includes a plurality of temperature sensors, and the temperature sensors are respectively arranged in the forward thrust pad, the reverse thrust pad and the radial pad in the guide bearing.

[0012] Optionally, the temperature measuring module is arranged in the thrust pad blocks in the forward thrust pad, the reverse thrust pad and the radial pad, and the number of thrust pad blocks spaced between adjacent temperature measuring modules in the same pad is greater than or equal to 1.

[0013] Optionally, the temperature data collected by the temperature measurement module includes: event sequence record quantity, temperature indication quantity;

[0014] The temperature measurement module is used to periodically collect analog signals and convert the analog signals into digital signals to generate the temperature indication;

[0015] The temperature measurement module is also used to collect corresponding switch value events when collecting analog signals.

[0016] Optionally, the local control module is used to obtain a temperature threshold and a temperature warning strategy, wherein the temperature threshold includes an upper limit and an upper-lower limit, and the temperature warning strategy includes a first quantity, a second quantity, and a response strategy after the temperature data exceeds the temperature threshold.

[0017] Optionally, the local control module is used to compare the temperature data collected by the temperature measuring modules in the forward thrust pad and the reverse thrust pad with the temperature threshold, and if the temperature data of at least a first number threshold of temperature measuring modules is greater than the upper limit, an early warning signal is generated, and the cooling devices corresponding to the forward thrust pad and the reverse thrust pad are started;

[0018] If the temperature data of the temperature measuring module is greater than the upper limit, the operation of the forward thrust pad and the reverse thrust pad is stopped immediately.

[0019] Optionally, the local control module is used to compare the temperature data collected by the temperature measuring module in the radial shoe with the temperature threshold, and if the temperature data of at least a second number threshold of temperature measuring modules is greater than the upper limit, an early warning signal is generated, and a cooling device corresponding to the radial shoe is started;

[0020] If the temperature data of the temperature measuring module is greater than the upper limit, the operation of the radial shoe is stopped immediately.

[0021] Optionally, the local control module is used to compare the difference between the temperature indication quantities in two adjacent cycles, and if the difference is greater than a preset fault threshold, it is determined that the corresponding temperature measurement module is in a fault state.

[0022] To achieve the above-mentioned purpose, a second aspect of the present application provides an electronic device, including: a processor, and a memory communicatively connected to the processor;

[0023] The memory stores computer-executable instructions;

[0024] The processor executes the computer-executable instructions stored in the memory to implement the system as described in any one of the first aspects.

[0025] The temperature measurement system of the hydropower unit provided in the present application monitors the temperature of the guide bearing of the hydropower unit through a temperature measurement module, thereby realizing accurate early warning of the temperature of the hydropower unit, avoiding unit failure caused by excessive temperature, and improving the operating efficiency of the unit.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0028] Figure 1 A schematic diagram of the structure of a temperature measurement system for a hydropower unit provided in an embodiment of the present application;

[0029] Figure 2 A schematic structural diagram of a temperature measurement system for a hydropower unit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0030] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0031] The embodiment of the present application provides a temperature measurement system for a hydropower unit. Figure 1 This is a schematic diagram of the structure of a temperature measurement system for a hydropower unit provided in an embodiment of the present application. Figure 1 As shown, the system includes: a device to be tested 10, a temperature measurement module 20, and a local control module 30;

[0032] The device to be tested 10 is a hydroelectric generator set;

[0033] The temperature measurement module 20 is arranged in the guide bearing of the hydroelectric generator set, and is used to collect the temperature data of the bearing bush in the guide bearing and send it to the local control module 30;

[0034] The local control module 30 is used to receive the temperature data and analyze the temperature data to generate a high temperature alarm.

[0035] In this embodiment, the thrust pad is an important component of the thrust bearing of the hydro-turbine generator, and its main function is to balance the axial thrust of the rotor and ensure that the rotor runs stably within the designed axial clearance. The thrust pad usually includes the following parts:

[0036] Thrust head: The thrust head is a key component connecting the rotor and the thrust bearing. It transmits the axial force of the rotor to the thrust bearing.

[0037] Mirror plate: The mirror plate is a smooth metal plate that contacts the thrust pad and serves to reduce friction and evenly distribute the load.

[0038] Thrust pad: The thrust pad is the core component of the thrust bearing, usually fan-shaped and installed on the bearing seat. The surface of the thrust pad is covered with babbitt alloy (black gold), which can melt at high temperatures, increase the displacement space of the main shaft, and thus protect the main shaft from dry friction.

[0039] Bearing seat: The bearing seat is the supporting structure of the thrust pad, ensuring that the thrust pad remains stable during operation.

[0040] Oil tank: The oil tank contains turbine oil, which acts as both a lubricant and a heat exchange medium. When the unit is running, the heat generated by the friction between the thrust bearing and the mirror plate is absorbed by the oil, which is then cooled by the oil cooler through which cooling water flows, and the heat is taken away by the water.

[0041] Cooler: The cooler is used to cool the turbine oil in the oil tank to ensure that the oil temperature is within a safe range and to prevent damage to the thrust bearing due to excessive oil temperature.

[0042] Figure 2 A schematic diagram of a temperature measurement system for a hydropower unit provided in an embodiment of the present application is shown in FIG. Figure 2 As shown, the temperature measurement module 20 includes a plurality of temperature sensors, and the temperature sensors are respectively arranged in the forward thrust pad, the reverse thrust pad and the radial pad in the guide bearing.

[0043] In this embodiment, there are multiple thrust pads in the forward thrust pad that can be provided with temperature measuring modules 20, among which the temperature measuring modules 20 are set at positions Z6, Z3, Z9, and Z12 to measure the temperature; there are multiple thrust pads in the reverse thrust pad that can be provided with temperature measuring modules 20, among which the temperature measuring modules 20 are set at positions Z15, Z18, Z21, and Z24 to measure the temperature; there are multiple thrust pads in the radial pad that can be provided with temperature measuring modules 20, among which the temperature measuring modules 20 are set at positions Z25, Z27, Z28, and Z30 to measure the temperature.

[0044] Optionally, the temperature measuring module 20 is arranged in the thrust pad blocks in the forward thrust pad, the reverse thrust pad and the radial pad, and the number of thrust pad blocks spaced between adjacent temperature measuring modules 20 in the same pad is greater than or equal to 1.

[0045] Optionally, the temperature data collected by the temperature measurement module 20 includes: event sequence record quantity, temperature indication quantity;

[0046] The temperature measurement module 20 is used to periodically collect analog signals and convert the analog signals into digital signals to generate the temperature indication;

[0047] The temperature measurement module 20 is also used to collect corresponding switch value events when collecting analog signals.

[0048] In this embodiment, the temperature measurement module 20 is a temperature indicator module, which is used to collect the analog signal of the thrust pad and convert it into a digital signal for processing and analysis by the computer system. The temperature measurement module 20 includes a thermistor. The resistance value of the conductor changes with the temperature. The temperature of the object being measured is calculated by measuring its resistance value. Thermistors are made of semiconductor materials, most of which have a negative temperature coefficient, that is, the resistance value decreases with increasing temperature. Temperature changes can cause large changes in resistance, so it is the most sensitive temperature sensor. The TI module can set high-high limit, high limit, low limit, low-low limit and other limit values, and issue an alarm or handle an accident when the temperature exceeds the limit.

[0049] Optionally, the local control module 30 is used to obtain a temperature threshold and a temperature warning strategy, wherein the temperature threshold includes an upper limit and an upper-lower limit, and the temperature warning strategy includes a first quantity, a second quantity, and a response strategy after the temperature data exceeds the temperature threshold.

[0050] In this embodiment, in the industrial control system, High-High Limit and High Limit are two different alarm thresholds used to monitor and protect the safe operation of equipment. The following are their specific differences:

[0051] The high limit is a threshold set according to process requirements. When the measured value exceeds this threshold, the system will sound an alarm to alert the operator. The high limit is mainly used to remind the operator that a parameter has deviated from the normal operating range, but has not yet reached a dangerous level. The high limit alarm usually does not trigger an emergency shutdown or other automatic protection actions, but reminds the operator to take measures to prevent the parameter from further increasing.

[0052] The high-high limit is a higher threshold than the high limit. When the measured value exceeds this threshold, the system will not only issue an alarm, but also trigger emergency protection actions, such as shutdown, valve closing, etc., to prevent equipment damage or safety accidents. The high-high limit alarm is used to take immediate measures to protect the safety of equipment and personnel when the parameters seriously deviate from the normal range. The high-high limit is usually set at a higher position than the high limit to ensure that emergency measures are taken before the parameters reach a dangerous level.

[0053] In a possible embodiment, the upper limit is 65°C and the upper upper limit is 70°C.

[0054] Optionally, the local control module 30 is used to compare the temperature data collected by the temperature measuring modules 20 in the forward thrust pad and the reverse thrust pad with the temperature threshold, and if the temperature data of at least a first number threshold of the temperature measuring modules 20 is greater than the upper limit, an early warning signal is generated, and the cooling devices corresponding to the forward thrust pad and the reverse thrust pad are started;

[0055] If the temperature data of the temperature measuring module 20 is greater than the upper limit, the operation of the forward thrust pad and the reverse thrust pad is stopped immediately.

[0056] Optionally, the local control module 30 is used to compare the temperature data collected by the temperature measuring module 20 in the radial shoe with the temperature threshold, and if the temperature data of at least the temperature measuring modules 20 of the second number threshold is greater than the upper limit, an early warning signal is generated, and a cooling device corresponding to the radial shoe is started;

[0057] If the temperature data of the temperature measuring module 20 is greater than the upper limit, the operation of the radial shoe is stopped immediately.

[0058] In this embodiment, when the bearing temperature of the unit reaches the upper limit, the hydraulic machinery should be shut down immediately to prevent the bearing from being damaged or causing more serious accidents due to excessive temperature. And troubleshooting:

[0059] Check the lubrication system: Check whether the lubrication system is working properly, including the oil level, oil quality and whether the oil circuit is unobstructed. Poor lubrication is one of the common reasons for the increase of bearing temperature.

[0060] Check the cooling system: Check whether the cooling system of the bearing is normal, including the flow and temperature of the cooling water, to ensure that the cooling system can effectively reduce the bearing temperature.

[0061] Check the bearings themselves: Check the bearings for wear, damage, or improper installation. Damage to the bearings can cause the temperature to rise.

[0062] Check the operating status of the unit: Check the operating status of the unit, including whether the load, speed, etc. are normal, and whether there is overload or abnormal operation.

[0063] Troubleshooting:

[0064] Replace the lubricating oil. If the lubricating oil quality is poor or the oil level is insufficient, it should be replaced with qualified lubricating oil in time.

[0065] Cleaning and maintenance: Clean and maintain the bearings to remove impurities and particles inside the bearings.

[0066] Repair and replace bearings. If the bearing is severely damaged, it needs to be repaired or replaced with a new one.

[0067] Through the above steps, the situation where the bearing temperature of the turbine generator set reaches the shutdown setting value can be effectively handled to ensure the safe operation of the unit.

[0068] Optionally, the local control module 30 is used to compare the difference between the temperature indication quantities in two adjacent cycles, and if the difference is greater than a preset fault threshold, it is determined that the corresponding temperature measurement module 20 is in a fault state.

[0069] In this embodiment, the program improves the temperature rise logic: if the measured value jump exceeds 5°C within a scanning cycle (about 20ms), the measured value is judged to be invalid (the quality of the measuring point is bad) and does not participate in the control.

[0070] In order to implement the above embodiments, the present application also proposes an electronic device, comprising: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; the processor executes the computer-executable instructions stored in the memory to implement the system provided by the above embodiments.

[0071] In order to implement the above embodiments, the present application also proposes a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the system provided by the above embodiments.

[0072] In order to implement the above embodiments, the present application also proposes a computer program product, including a computer program, which implements the system provided by the above embodiments when executed by a processor.

[0073] The collection, storage, use, processing, transmission, provision and disclosure of user personal information involved in this application are in compliance with relevant laws and regulations and do not violate public order and good morals.

[0074] It should be noted that personal information from users should be collected for legitimate and reasonable purposes and should not be shared or sold outside of these legitimate uses. In addition, such collection / sharing should be carried out after receiving the user's informed consent, including but not limited to notifying the user to read the user agreement / user notice and sign the agreement / authorization including authorization of relevant user information before the user uses the function. In addition, any necessary steps should be taken to protect and safeguard access to such personal information data and ensure that others who have access to personal information data comply with its privacy policy and procedures.

[0075] The present application is expected to provide an implementation scheme for users to selectively block the use or access of personal information data. That is, the present disclosure is expected to provide hardware and / or software to prevent or block access to such personal information data. Once the personal information data is no longer needed, the risk can be minimized by limiting data collection and deleting the data. In addition, when applicable, such personal information is de-identified to protect the privacy of the user.

[0076] In the description of the aforementioned embodiments, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0077] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0078] Any process or system description in a flowchart or otherwise described herein may be understood to represent a module, fragment or portion of code that includes one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.

[0079] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute the instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purpose of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), a fiber optic device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0080] It should be understood that the various parts of the present application can be implemented with hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or systems can be implemented with software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented with hardware, as in another embodiment, it can be implemented with any one of the following technologies known in the art or their combination: a discrete logic circuit with a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit with a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0081] A person skilled in the art may understand that all or part of the steps of the system implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the system embodiment.

[0082] In addition, each functional unit in each embodiment of the present application may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0083] The storage medium mentioned above may be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art may change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A temperature measurement system for a hydropower unit, characterized in that: include: Equipment under test, temperature measurement module, local control module; The equipment to be tested is a hydroelectric generator set; The temperature measurement module is arranged in the guide bearing of the hydroelectric generator set, and is used to collect the temperature data of the bearing bush in the guide bearing and send it to the local control module; The local control module is used to receive the temperature data and analyze the temperature data to generate a high temperature alarm.

2. The system according to claim 1, characterized in that The temperature measurement module includes a plurality of temperature sensors, and the temperature sensors are respectively arranged in the forward thrust pad, the reverse thrust pad and the radial pad in the guide bearing.

3. The system according to claim 2, characterized in that The temperature measuring module is arranged in the thrust pads of the forward thrust pad, the reverse thrust pad and the radial pad, and the number of thrust pads spaced between adjacent temperature measuring modules in the same pad is greater than or equal to 1.

4. The system according to claim 3, characterized in that The temperature data collected by the temperature measurement module includes: event sequence record quantity and temperature indication quantity; The temperature measurement module is used to periodically collect analog signals and convert the analog signals into digital signals to generate the temperature indication; The temperature measurement module is also used to collect corresponding switch value events when collecting analog signals.

5. The system according to claim 4, characterized in that The local control module is used to obtain a temperature threshold and a temperature warning strategy, wherein the temperature threshold includes an upper limit and an upper-high limit, and the temperature warning strategy includes a first quantity, a second quantity, and a response strategy after the temperature data exceeds the temperature threshold.

6. The system according to claim 5, characterized in that The local control module is used to compare the temperature data collected by the temperature measuring modules in the forward thrust pad and the reverse thrust pad with the temperature threshold, and if the temperature data of at least a first number of temperature measuring modules is greater than the upper limit, an early warning signal is generated, and the cooling devices corresponding to the forward thrust pad and the reverse thrust pad are started; If the temperature data of the temperature measuring module is greater than the upper limit, the operation of the forward thrust pad and the reverse thrust pad is stopped immediately.

7. The system according to claim 6, characterized in that The local control module is used to compare the temperature data collected by the temperature measuring modules in the radial pads with the temperature threshold, and if the temperature data of at least the temperature measuring modules of the second number threshold is greater than the upper limit, an early warning signal is generated, and a cooling device corresponding to the radial pad is started; If the temperature data of the temperature measuring module is greater than the upper limit, the operation of the radial shoe is stopped immediately.

8. The system according to claim 4, characterized in that The local control module is used to compare the difference between the temperature indication quantities in two adjacent cycles. If the difference is greater than a preset fault threshold, it is determined that the corresponding temperature measurement module is in a fault state.

9. An electronic device, characterized in that: include: A processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the system according to any one of claims 1 to 8.

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