High-voltage electrical equipment node on-line temperature measurement system

Abstract

The invention relates to the technical field of automation, and discloses a high-voltage electrical equipment node on-line temperature measurement system, which comprises a temperature measurement module A used for measuring the temperature of a main transformer body, a high-low voltage porcelain insulator and a lead connector; the B temperature measurement module is used for monitoring the temperature of a cabinet body, an upper contact, a lower contact and the like in the 6KV switch cabinet; the temperature measurement module C is used for monitoring the real-time temperature of a disconnecting link of the electric reactor; and the data transmission and summarization module is used for collecting, storing and transmitting the temperature data. By monitoring and transmitting the temperature in real time and adopting the online infrared thermometer H2 and the infrared dot matrix thermometer, the purposes of being small in size, capable of imaging, accurate in temperature measurement and convenient to install on site are achieved, meanwhile, a temperature curve can be formed in real time, an alarm unit is arranged, the safety performance of the device can be improved, and the safety performance of the device is improved. And an operator can conveniently and quickly carry out analysis and processing.

Description

Technical Field

[0001] The present invention relates to the field of automation technology, and particularly to an on-line temperature measurement system for high-voltage electrical equipment nodes. Background Art

[0002] The 6KV reactor knife switch of the refining transformer has been used for more than 10 years. For long-term operating equipment, the contact resistance of the contacts is prone to aging and increase. When the load is large, it is prone to overheating. There have been many cases where the three-phase contact temperatures of the reactor knife switches of the first-phase expansion line B and the diesel hydrogenation line B are seriously unbalanced; the 6KV high-voltage switchgear has a closed structure, and only indirect temperature measurement measures such as temperature-testing wax pieces can be used. There have been many cases where the temperature-testing wax pieces in the incoming line cabinet have changed color, and the currently used hand-held temperature measurement equipment (infrared thermometer) cannot measure the actual temperature of the contacts through the switchgear; the main transformer of the refining transformer is an 110KV extra-high voltage equipment. Since it is an oil-filled equipment, it is necessary to measure the temperature at the contacts, check the overall operation for local overheating, and conduct comparative analysis. It is necessary to conduct long-distance non-contact observation of local temperature rise to achieve predictive maintenance.

[0003] Currently, the existing temperature measurement technologies mainly use temperature-testing wax pieces, infrared thermometers, etc. for temperature measurement. The temperature-testing wax pieces can only change color when the temperature exceeds the set temperature, and the overheated point has already formed, which is not conducive to early detection of the temperature rise trend and eliminating overheating in the budding state. Although the infrared thermometer can measure the temperature more accurately, it cannot penetrate closed containers, switchgears, etc. Therefore, it is impossible to accurately measure the internal contacts of many equipment, and the operating equipment is prone to accidents such as equipment aging, damage, insulation breakdown, and burnout due to overheating, affecting the safe operation of electrical equipment. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides an on-line temperature measurement system for high-voltage electrical equipment nodes, which solves the problems that the existing temperature measurement technologies cannot timely detect the temperature rise trend and cannot penetrate closed containers, switchgears, etc., resulting in inaccurate measurement of the internal contacts of many equipment.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: An on-line temperature measurement system for high-voltage electrical equipment nodes, comprising: a temperature measurement module A, which is used to measure the temperature of the main transformer body, high- and low-voltage porcelain insulators, and lead joints; a temperature measurement module B, which is used to monitor the temperature of the cabinet body, upper and lower contacts, etc. inside the 6KV switchgear; a temperature measurement module C, which is used to monitor the real-time temperature of the reactor knife switch; a data transmission and aggregation module, which is used to collect, store, and transmit temperature data so that the upper computer can obtain the temperature data in real time and perform corresponding processing and display; Main monitoring system, which is used to analyze and calculate the acquired data, and can set the allowable values of temperature and temperature rise according to the allowable value of the temperature of the equipment contact point.

[0006] Preferably, the data transmission and aggregation module includes an MLX90640 module, a single-chip microcomputer and a host computer. The MLX90640 module is used to acquire the thermal imaging image and temperature data of the target object in real time; The single-chip microcomputer is used to receive the temperature data sent by the MLX90640 module, store the data, convert the signal of serial port 1 into the signal required for RS485 bus communication, and communicate with the host computer; The host computer is used to communicate with the single-chip microcomputer, obtain the temperature data and perform real-time display and analysis.

[0007] Preferably, the main monitoring system includes a monitoring host, a computer analysis and calculation unit, an alarm unit and a data storage unit. The monitoring host is used to display the ambient temperature, the highest and lowest temperatures of the collection points; The computer analysis and calculation unit is used to analyze and calculate the acquired data to form a real-time temperature curve; The alarm unit is used to issue an audible alarm and a message when the set range is exceeded; The data storage unit is used to store the generated data to form big data.

[0008] Preferably, the A temperature measurement module adopts the infrared temperature measurement method for the main transformer of the refinery.

[0009] Preferably, both the B temperature measurement module and the C temperature measurement module adopt an infrared dot matrix temperature measurement device for temperature measurement.

[0010] Preferably, the main monitoring system adopts wireless sensor network technology for data acquisition and transmission of each temperature measurement module.

[0011] Working principle: During the working process, for the infrared temperature measurement of the main transformer in the refining and chemical transformation main transformer in the A temperature measurement module, an online thermal imager H2 with a network interface is used to measure the temperature of the main transformer body, high and low voltage porcelain insulators, and lead joints. At the same time, the infrared dot matrix temperature measurement devices in the B temperature measurement module and the C temperature measurement module will detect the temperature of the cabinet body, upper and lower contacts, etc. inside the 6KV switch cabinet, as well as monitor the real-time temperature of the reactor knife switch. At this time, the MLX90640 module collects the temperature data and sends it to the single-chip microcomputer through the serial port 1 of the single-chip microcomputer. The single-chip microcomputer receives the temperature data and stores it in the internal register. The host computer sends a temperature data request to the single-chip microcomputer through the RS485 bus, using the MODBUS communication protocol. At this time, after receiving the request from the host computer, the single-chip microcomputer sends the real-time temperature data to the host computer through the RS485 bus. After receiving the temperature data, the host computer will perform further processing and display. The monitoring host will display various indicators of the temperature data, such as the ambient temperature, the highest and lowest temperatures of the collection points. At the same time, the computer analysis and calculation unit analyzes and calculates the temperature data to form a real-time temperature curve. The alarm unit monitors whether the temperature exceeds the set range. If it exceeds, it will issue an audible alarm and a message.

[0012] The present invention provides an on-line temperature measurement system for high-voltage electrical equipment nodes. It has the following beneficial effects: 1. In the present invention, the single-chip microcomputer receives the temperature data sent by the MLX90640 module, stores it in the internal register, converts the serial port 1 into an RS485 bus communication interface, responds to the MODBUS communication protocol of the host computer, and sends the temperature data to the host computer in real time. It can effectively collect the temperature data in the environment accurately and in real time through the MLX90640 module and the single-chip microcomputer. And under the action of storing in the internal register, it can be conveniently processed and accessed inside the system, while avoiding additional memory costs. And by converting the serial port 1 into an RS485 bus communication interface, long-distance communication can be realized, and multiple devices are supported to share the same bus, improving the scalability and flexibility of the system. And responding to the MODBUS communication protocol of the host computer enables the host computer to conveniently communicate and exchange data with the single-chip microcomputer, realizing functions such as monitoring, control, and analysis of temperature data.

[0013] 2. The resolution of the online infrared thermometer H2 in the present invention is 256x192, which is used for large equipment or long-distance large-area infrared imaging temperature measurement and has a network interface supporting POE power supply. The resolution of the infrared dot matrix thermometer is 32x24, which is used for close-range infrared imaging temperature measurement. Its characteristics are small volume and easy to install inside electrical equipment, and low cost, suitable for a large number of applications in various occasions.

[0014] 3. Through the infrared dot matrix thermometer, the data collected by the present invention can be uploaded to the monitoring host in real time. The monitoring host can clearly display the ambient temperature, the highest and lowest temperatures of the collection points. Through the analysis and calculation of the computer, a real-time temperature curve can be formed, and the temperature and temperature rise allowable values can be set according to the allowable values of the equipment contact point temperature. When the set range is exceeded, an audible alarm and a message can be issued, and the operating personnel can quickly analyze and process it. At the same time, big data can also be formed, providing valuable reference for equipment maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a framework diagram of the on-line temperature measurement system for high-voltage electrical equipment nodes of the present invention; Figure 2 It is a framework diagram of the data transmission and summary module of the present invention; Figure 3 It is a framework diagram of the main monitoring system of the present invention; Figure 4 It is a schematic wiring structure diagram of the infrared dot matrix thermometer of the present invention; Figure 5 It is a circuit diagram of the MLX90640 module converted to the RS485 bus of the present invention. EMBODIMENT

[0016] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. EXAMPLE

[0017] Please refer to the appendix Figure 1 , the embodiment of the present invention provides an on-line temperature measurement system for high-voltage electrical equipment nodes, including: A temperature measurement module, the A temperature measurement module is used to measure the temperature of the main transformer body, high and low voltage porcelain insulators, and lead joints; B temperature measurement module, the B temperature measurement module is used to monitor the temperature of the cabinet body, upper and lower contacts, etc. inside the 6KV switch cabinet; C temperature measurement module, the C temperature measurement module is used to monitor the real-time temperature of the reactor knife switch; Data transmission and summary module, the data transmission and summary module is used to collect, store and transmit temperature data so that the upper computer can obtain the temperature data in real time and perform corresponding processing and display; Main monitoring system, the main monitoring system is used to analyze and calculate the obtained data, and can set the temperature and temperature rise allowable values according to the allowable values of the equipment contact point temperature.

[0018] Please refer to the appendix Figure 2, the data transmission and aggregation module includes an MLX90640 module, a single-chip microcomputer, and a host computer. The MLX90640 module is used to obtain the thermal imaging image and temperature data of the target object in real time. The MLX90640 module is a sensor module based on infrared thermal imaging. It mainly uses the integrated infrared thermal imager sensor MLX90640, which can obtain the thermal imaging image and temperature data of the target object in real time. It has high resolution, wide field of view, non-contact temperature measurement, digital interface, temperature calibration, and low-power design. It can monitor the temperature distribution of the target object in real time, which helps to detect abnormal situations in time and take corresponding measures; The single-chip microcomputer is used to receive the temperature data sent by the MLX90640 module, store the data, convert the serial port 1 signal into the signal required for RS485 bus communication, and communicate with the host computer. The single-chip microcomputer is an integrated circuit chip integrating a microprocessor core, memory, input / output interfaces, and other peripheral devices, thus serving as the core control unit of the entire system and being responsible for data processing and transmission; The host computer is used to communicate with the single-chip microcomputer, obtain the temperature data, and perform real-time display and analysis. The host computer refers to the upper-layer computer corresponding to the lower-layer computer. It has higher computing power and operating system support. It can be used to monitor, control, and manage the lower-layer computer system. And the host computer can use the MODBUS communication protocol to exchange data with the single-chip microcomputer, thereby realizing the monitoring, control, and analysis of the temperature data. The host computer can provide a user-friendly interface, enabling users to intuitively operate the system and obtain the real-time status of the temperature data. At the same time, it has the characteristics of high computing power, multitasking, graphical user interface, data processing and analysis, and remote access and control, thus ensuring the stability and security of the system.

[0019] By receiving the temperature data sent by the MLX90640 module through the single-chip microcomputer, saving it in the internal register, converting the serial port 1 into an RS485 bus communication interface, responding to the MODBUS communication protocol of the host computer, and sending the temperature data to the host computer in real time, it can effectively and accurately collect the temperature data in the environment through the MLX90640 module and the single-chip microcomputer in real time. And with the function of storing in the internal register, it can be conveniently processed and accessed within the system, while avoiding additional memory costs. Also, by converting the serial port 1 into an RS485 bus communication interface, long-distance communication can be achieved, and multiple devices are supported to share the same bus, improving the scalability and flexibility of the system. And responding to the MODBUS communication protocol of the host computer enables the host computer to conveniently communicate and exchange data with the single-chip microcomputer, realizing functions such as monitoring, control, and analysis of the temperature data Please refer to the appendix Figure 3, the main monitoring system includes a monitoring host, a computer analysis and calculation unit, an alarm unit, and a data storage unit. The monitoring host is used to display the environmental temperature, the highest and lowest temperatures of the collection points; The computer analysis and calculation unit is used to analyze and calculate the acquired data to form a real-time temperature curve; The alarm unit is used to issue an audible alarm and a message when the set range is exceeded; The data storage unit is used to store the generated data to form big data.

[0020] Please refer to the appendix Figure 1 , The A temperature measurement module adopts the infrared temperature measurement method for the main transformer of refining and chemical transformation, and uses an online thermal imager H2 with a network interface to measure. It is mainly connected to other devices through other network interfaces, can capture the infrared radiation on the surface of the target object in real time, and convert it into a thermal imaging image. By analyzing the thermal imaging image, the temperature distribution information of the target object can be obtained. On the main transformer of refining and chemical transformation, the thermal imager is used to measure the temperature of the main transformer body, high and low voltage porcelain bottles, and lead joints. By placing the thermal imager in a suitable position, it can scan the entire target area and display the temperature distribution in real time, so that the operator can monitor the temperature of the equipment in time, and take corresponding measures when the temperature exceeds the set temperature and the set range of the allowable temperature rise, to prevent the equipment from overheating and causing faults or damages, effectively realizing the temperature monitoring of the main transformer of refining and chemical transformation, to provide real-time feedback and early warning functions for the operation status of the equipment. Among them, the resolution of the online thermal imager is 256x192, which is used for large equipment or long-distance large-area infrared imaging temperature measurement, and has a network interface to support POE power supply.

[0021] Both the B temperature measurement module and the C temperature measurement module use an infrared dot matrix temperature measurement device to measure temperature. The resolution of the infrared dot matrix thermometer is 32x24, which is used for close-range infrared imaging temperature measurement. Its characteristics are small volume and easy to install inside electrical equipment, low cost and suitable for a large number of applications in various occasions, and at the same time the cost is relatively low.

[0022] The main monitoring system adopts wireless sensor network technology for data acquisition and transmission of each temperature measurement module. The wireless sensor network technology can realize real-time data acquisition and transmission of each temperature measurement module. Through the wireless communication between the wireless sensor nodes and the main monitoring system, the temperature data of each temperature measurement module can be obtained in real time without using wired connections, improving the real-time performance and flexibility of monitoring. At the same time, due to the adoption of wireless sensor network technology, multiple temperature measurement modules can be conveniently arranged at the device nodes and the data can be transmitted to the main monitoring system through wireless communication. In this way, the temperature monitoring of multiple device nodes can be realized, with a wider coverage range and adaptation to various complex scenario requirements. The wireless sensor network technology makes the layout and configuration of the system more flexible without considering the limitations of wired connections. At the same time, the number of wireless sensor nodes can be flexibly expanded according to requirements, facilitating the temperature monitoring of different device nodes and meeting the application requirements of different scales and complexities. The wireless sensor network technology has certain anti-interference ability and signal stability during data transmission, and can effectively transmit the temperature data to the main monitoring system. In this way, the accuracy and reliability of the data can be ensured, and the stability and availability of the system can be improved. The main monitoring system adopting wireless sensor network technology can realize data acquisition and transmission of each temperature measurement module, and has the effects of real-time monitoring, distributed layout, flexibility, scalability and data transmission stability. These effects make the system more flexible and reliable, and can meet the requirements of on-line temperature measurement of high-voltage electrical equipment nodes under different application scenarios.

[0023] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An online temperature measurement system for high-voltage electrical equipment nodes, characterized in that: include: A temperature measurement module, which is used to measure the temperature of the main transformer body, high and low voltage porcelain bottles, and lead joints; B temperature measurement module, the B temperature measurement module is used to monitor the temperature of the cabinet, upper and lower contacts, etc. in the 6KV switch cabinet; C temperature measurement module, the C temperature measurement module is used to monitor the real-time temperature of the reactor switch; A data transmission and aggregation module, which is used to collect, store and transmit temperature data so that the host computer can obtain the temperature data in real time and perform corresponding processing and display; The main monitoring system is used to analyze and calculate the acquired data, and can set the temperature and temperature rise allowable values ​​according to the allowable values ​​of the equipment contact temperature.

2. The online temperature measurement system for high-voltage electrical equipment nodes according to claim 1 is characterized in that: The data transmission and aggregation module includes an MLX90640 module, a single-chip microcomputer and a host computer, and the MLX90640 module is used to obtain thermal imaging images and temperature data of the target object in real time; The single-chip microcomputer is used to receive temperature data sent by the MLX90640 module, store data, convert serial port 1 signals into signals required for RS485 bus communication, and communicate with the host computer; The host computer is used to communicate with the single-chip microcomputer, obtain temperature data, and perform real-time display and analysis.

3. The online temperature measurement system for high-voltage electrical equipment nodes according to claim 1 is characterized in that: The main monitoring system includes a monitoring host, a computer analysis and calculation unit, an alarm unit and a data storage unit. The monitoring host is used to display the ambient temperature and the highest and lowest temperatures of the collection points; The computer analysis and calculation unit is used to analyze and calculate the acquired data to form a real-time temperature curve; The alarm unit is used to issue an audible alarm and a message when the set range is exceeded; The data storage unit is used to store the generated data to form big data.

4. The online temperature measurement system for high-voltage electrical equipment nodes according to claim 1 is characterized in that: The A temperature measurement module adopts the infrared temperature measurement method of the main transformer of the refining and chemical transformation.

5. The online temperature measurement system for high-voltage electrical equipment nodes according to claim 1 is characterized in that: The B temperature measurement module and the C temperature measurement module both use infrared dot matrix temperature measurement devices to measure temperature.

6. The online temperature measurement system for high-voltage electrical equipment nodes according to claim 1 is characterized in that: The main monitoring system adopts wireless sensor network technology to collect and transmit data from each temperature measurement module.

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