Remote passive power equipment temperature measurement system and temperature measurement method

Abstract

The invention belongs to the technical field of power equipment temperature detection, and particularly relates to a remote passive power equipment temperature measurement system and a temperature measurement method. The temperature measurement system comprises: a data sensing module, which adopts a passive radio frequency temperature electronic sensor to collect real-time temperature data of a to-be-measured power device; the data acquisition and transmission module is used for receiving the real-time temperature data and the sensor chip identification code in real time in a wireless mode by adopting an Internet of Things data gateway, and sending the received data to the data processing module through a 5G network; the data processing module is used for acquiring the data sent by the data acquisition and transmission module; and a temperature alarm threshold value is set, and when the real-time temperature data exceeds the temperature alarm threshold value, automatic alarm is carried out. The method provided by the invention has the strong advantages of high timeliness, low cost, high accuracy, long identification distance and the like.

Description

Technical Field

[0001] The invention belongs to the technical field of temperature detection of electric power equipment, and in particular relates to a remote passive temperature measurement system and a temperature measurement method for electric power equipment. Background Art

[0002] According to statistical analysis, 40% of power accidents that occur each year are caused by overheating of high-voltage electrical equipment; and in power supply systems using high-voltage switchgear and power cables, more than 70% of cable operation failures are caused by excessively high joint temperatures due to increased contact resistance at the connection, overload, etc. Therefore, it is very necessary to conduct real-time monitoring and early warning of temperature changes at the connection points of high-voltage switchgear.

[0003] At present, most of the temperature detection work of power system equipment is done manually on site. During the inspection process, the most important thing is to pay attention to personal safety and keep a safe distance from the live equipment. Therefore, inspection personnel usually use handheld infrared thermometers to measure the temperature of hot spots.

[0004] Due to the scattered layout of power equipment, this temperature measurement method must be regularly carried out by special personnel and special vehicles, which consumes a lot of manpower and material resources, and the work efficiency is not high. After the construction of the power equipment joint is completed, a layer of insulating sheath will be wrapped, which affects the temperature measurement accuracy of the infrared thermometer at that location, and the temperature measurement accuracy is poor. The use of infrared thermometers requires high temperature measurement technical capabilities of the staff. The temperature measurement data of personnel with different skills vary greatly, and it is impossible to accurately judge the actual temperature of the temperature measurement point. Some high-voltage power equipment is installed inside the high-voltage cabinet and cannot be turned on when powered. This part of the equipment cannot be measured using infrared temperature measurement equipment. In addition, the traditional temperature measurement method has a long cycle, complex construction, low efficiency, and is not easy to manage. When a fault occurs, it takes a lot of manpower to physically check and re-lay the cables. In certain occasions, the monitoring points are scattered, the environment is closed, or there is high voltage, and many temperature measurement methods cannot achieve measurement work.

[0005] Traditional wireless temperature measurement methods basically use small wireless methods such as 433MHZ for transmission, which has short transmission distance and unstable transmission, and cannot achieve relatively long-distance transmission without network coverage. Summary of the invention

[0006] In response to the above technical problems, the present invention provides a remote passive power equipment temperature measurement system and temperature measurement method, which mainly solves the remote automatic perception and real-time detection of the temperature of high and low voltage equipment in the power system, so that operation and maintenance personnel do not need to be on site and non-contact to detect the temperature of the equipment, eliminates the safety hazards caused by heat in power equipment, improves the efficiency of operation and maintenance work, prevents personal electric shock injuries, and ensures the reliable operation of the power system.

[0007] The present invention is achieved through the following technical solutions: A remote passive power equipment temperature measurement system, the temperature measurement system comprising: Data sensing module: adopts a passive radio frequency temperature electronic sensor to collect real-time temperature data of the power equipment to be tested, and the passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data, and the antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data acquisition and transmission module: an IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing module: obtains the data sent by the data acquisition and transmission module; and sets a temperature alarm threshold, and automatically issues an alarm when the real-time temperature data exceeds the temperature alarm threshold.

[0008] Furthermore, the passive radio frequency temperature electronic sensor is an RFID temperature sensor, and the RFID temperature sensor includes an antenna for transmitting the real-time temperature data.

[0009] Furthermore, the RFID temperature sensor includes a temperature measurement chip and an antenna for data transmission; The substrate of the temperature measuring chip of the RFID temperature sensor is made of boron nitride material; a microstrip reflective antenna is respectively arranged at both ends of the boron nitride substrate.

[0010] Furthermore, the RFID temperature sensor and the power equipment are tightly connected by thermally conductive adhesive; The RFID temperature sensor is installed at all heat generating points inside and outside the power equipment.

[0011] Furthermore, the Internet of Things data gateway is a LORA Internet of Things data gateway; an Internet of Things data gateway is arranged outside each high-voltage device, and each Internet of Things data gateway arranged outside the high-voltage device can receive signals from all RFID temperature sensors arranged inside / outside the high-voltage device.

[0012] Furthermore, when an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel, and the operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm according to the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

[0013] Furthermore, the data processing module displays the temperature data of all the power equipment in the area through a visual interface.

[0014] A remote passive power equipment temperature measurement method, the method comprising: Data sensing: A passive radio frequency temperature electronic sensor is used to collect real-time temperature data of the power equipment to be tested. The passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data. The antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data collection and transmission: The IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing: Acquire the data sent by the data acquisition and transmission module; set the temperature alarm threshold, and automatically alarm when the real-time temperature data exceeds the temperature alarm threshold; when an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel, and the operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm according to the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

[0015] Beneficial technical effects of the present invention: The remote passive power equipment temperature measurement system provided by the present invention applies passive RFID temperature sensors to power equipment in the power system (including high, medium and low voltage power facilities and equipment) to test the equipment operating temperature in real time, thus saving a lot of manpower and fundamentally solving the monitoring errors caused by human factors.

[0016] The remote passive power equipment temperature measurement system provided by the present invention directly contacts the temperature measurement chip of the RFID temperature sensor with the heat source itself, which will not cause monitoring errors due to other structures, greatly improving the monitoring efficiency and accuracy. Its remote, automated, and non-manual temperature measurement method can timely discover safety hazards caused by abnormal temperatures in high, medium, and low voltage facilities of the power system; it transforms daily operation and inspection work into digitalization to achieve cost reduction and efficiency improvement. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a logical diagram of the data transmission architecture of a remote passive power equipment temperature measurement system in an embodiment of the present invention; Figure 2 Schematic diagram of a remote passive power equipment temperature measurement method according to an embodiment of the present invention; Figure 3 Schematic diagram of a visualization interface in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0019] On the contrary, the present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention as defined by the claims. Further, in order to make the public have a better understanding of the present invention, some specific details are described in detail in the detailed description of the present invention below. Those skilled in the art can fully understand the present invention without the description of these details.

[0020] Embodiment 1: A remote passive power equipment temperature measurement system: The temperature measurement system comprises: Data sensing module: adopts a passive radio frequency temperature electronic sensor to collect real-time temperature data of the power equipment to be tested, and the passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data, and the antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data acquisition and transmission module: an IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing module: obtains the data sent by the data acquisition and transmission module; and sets a temperature alarm threshold, and automatically issues an alarm when the real-time temperature data exceeds the temperature alarm threshold. Specifically, the data processing module is a host computer, which is used to automatically acquire, process, and analyze data to achieve digital management.

[0021] In this embodiment, the passive radio frequency temperature electronic sensor is an RFID temperature sensor, and the RFID temperature sensor includes an antenna for transmitting the real-time temperature data.

[0022] In this embodiment, the RFID temperature sensor includes a temperature measurement chip and an antenna for data transmission; The substrate of the temperature measuring chip of the RFID temperature sensor is made of boron nitride material; a microstrip reflective antenna is respectively arranged at both ends of the boron nitride substrate.

[0023] Boron nitride has high electrical insulation, thermal conductivity and thermal stability, and can meet the temperature measurement requirements of -40℃~200℃, so it can be used in temperature measurement scenarios of high-temperature and high-voltage power facilities. To enhance the signal reception strength, a microstrip reflective antenna is set at each end of the boron nitride substrate to enhance the radio signal reception strength of the RF chip, increasing the signal reception strength by more than 15%.

[0024] In this embodiment, the RFID temperature sensor and the power equipment are tightly connected by thermal conductive glue; The RFID temperature sensor is installed at all heat generating points inside and outside the power equipment.

[0025] During the long-term operation of high-voltage distribution switchgear, power cables and other equipment, the contact points, busbars and outgoing line connections of the switches increase contact resistance due to oxidation corrosion or loose fastening bolts. Under high-load operation, the connection points heat up and form a vicious cycle. The temperature of the hot spots is difficult to monitor, which eventually leads to excessive temperature or even burning of the connection parts, causing power outages. The hot spots include hot spots such as the joints of power equipment, and some hot spots are located inside the power equipment, which are not convenient for manual detection.

[0026] In the present invention, the RFID temperature sensor is closely attached to various operating equipment to achieve the purpose of sensing the real-time temperature of the power operating equipment. The RFID temperature sensor is a passive device, and the substrate is made of boron nitride material. Boron nitride has high electrical insulation, thermal conductivity and thermal stability, and can meet the temperature measurement requirements of -40℃~200℃; therefore, it can be used in temperature measurement scenarios of high-temperature and high-voltage power facilities.

[0027] In this embodiment, the Internet of Things data gateway is a LORA Internet of Things data gateway.

[0028] The LORA IoT data gateway includes a communication module, a radio frequency identification module, and a radio frequency antenna. The LORA IoT data gateway interacts with the passive radio frequency temperature electronic sensor to complete real-time data collection and transmission; the data collection and transmission module uses the IoT data gateway with the IoT + radio frequency identification technology, which automatically identifies the target object and obtains relevant data through radio frequency signals. The identification work does not require manual intervention and can work in various harsh environments; this step uses the IoT data gateway to wirelessly collect equipment temperature data in real time, which can realize remote automatic detection of power facility temperature.

[0029] In this embodiment, when an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel, and the operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm according to the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

[0030] like Figure 3 As shown, the data processing module displays the temperature data of all power equipment in the area through a visual interface.

[0031] Embodiment 2: A remote passive power equipment temperature measurement method, using a remote passive power equipment temperature measurement system described in Embodiment 1, such as Figure 2 As shown, the method includes: Data sensing: A passive radio frequency temperature electronic sensor is used to collect real-time temperature data of the power equipment to be tested. The passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data. The antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data collection and transmission: The IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing: Acquire the data sent by the data acquisition and transmission module; set the temperature alarm threshold, and automatically alarm when the real-time temperature data exceeds the temperature alarm threshold; when an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel, and the operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm according to the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

[0032] The remote passive high-voltage equipment and power equipment temperature measurement system provided by the present invention wirelessly communicates data between an RFID temperature sensor that integrates an object unique identity coding function and a temperature measurement function and an Internet of Things data gateway, reads the chip identification code and temperature data, and transmits the data to a host computer through a wireless network, thereby realizing automatic data collection, processing, and analysis, and realizing digital management.

[0033] The present invention develops technologies and equipment such as RFID temperature sensors and LORA IoT data gateways to build an automated wireless transmission link. Using the IoT data gateway, the device temperature data is collected wirelessly in real time to achieve remote automatic temperature detection of power facilities. The LORA+5G mode is used for transmission to achieve automated, safe and efficient remote temperature detection of power equipment without manual on-site intervention.

[0034] The remote passive high-voltage equipment temperature measurement system in Example 1 is used for remote automatic sensing and real-time detection of the temperature of high and low voltage equipment in the power system, and realizes automatic, safe and efficient remote power equipment temperature detection without manual on-site intervention on high-voltage operating equipment such as 10kV, 35kV, and 110kV. The system sets the temperature alarm threshold for four seasons, and automatically alarms when the temperature exceeds the set temperature, and promptly informs the operation and maintenance personnel to carry out maintenance, thereby achieving the purpose of intelligent operation and maintenance.

[0035] The temperature measurement method provided by the present invention adopts a passive radio frequency temperature electronic sensor, which is much superior to the traditional manual temperature measurement using an infrared thermometer. Compared with the traditional method (manual temperature measurement using an infrared thermometer is limited by manpower, time, location and other prominent disadvantages), the temperature measurement method provided by the present invention has the powerful advantages of "high timeliness", "low cost", "high accuracy" and "long recognition distance".

[0036] The remote passive power equipment temperature measurement system provided by the present invention performs intelligent upgrading and transformation of the temperature measurement technology of the power system equipment, which can greatly reduce the workload of manual temperature measurement, and can be especially applied to special scenarios where manual temperature measurement cannot be carried out, such as hidden environments, inside high-voltage operating equipment, and cable temperature measurement in cable trenches. If high-voltage equipment and cables in the substation fail, it is easy to cause large-scale power outages. Through digital technology, operation and maintenance personnel can arrange equipment maintenance in advance according to the status of power equipment and cables, reduce the occurrence of equipment failures, improve voltage quality, and reduce the occurrence of power outages, providing reliable power guarantee for the normal operation of the economy and society.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A remote passive power equipment temperature measurement system, characterized in that: The temperature measurement system comprises: Data sensing module: adopts a passive radio frequency temperature electronic sensor to collect real-time temperature data of the power equipment to be tested, and the passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data, and the antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data acquisition and transmission module: an IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing module: obtains the data sent by the data acquisition and transmission module; and sets a temperature alarm threshold, and automatically issues an alarm when the real-time temperature data exceeds the temperature alarm threshold.

2. A remote passive power equipment temperature measurement system according to claim 1, characterized in that: The passive radio frequency temperature electronic sensor is an RFID temperature sensor, and the RFID temperature sensor includes an antenna for transmitting the real-time temperature data.

3. A remote passive power equipment temperature measurement system according to claim 1, characterized in that: The RFID temperature sensor includes a temperature measurement chip and an antenna for data transmission; The substrate of the temperature measuring chip of the RFID temperature sensor is made of boron nitride material; a microstrip reflective antenna is respectively arranged at both ends of the boron nitride substrate.

4. A remote passive power equipment temperature measurement system according to claim 2, characterized in that: The RFID temperature sensor and the power equipment are tightly connected by thermal conductive glue; The RFID temperature sensor is installed at all heat generating points inside and outside the power equipment.

5. A remote passive power equipment temperature measurement system according to claim 1, characterized in that: The Internet of Things data gateway is a LORA Internet of Things data gateway.

6. A remote passive power equipment temperature measurement system according to claim 1, characterized in that: When an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel. The operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm based on the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

7. A remote passive power equipment temperature measurement system according to claim 1, characterized in that: The data processing module displays the temperature data of all the power equipment in the area through a visual interface.

8. A remote passive power equipment temperature measurement method, using a remote passive power equipment temperature measurement system according to claims 1-7, characterized in that: The method comprises: Data sensing: A passive radio frequency temperature electronic sensor is used to collect real-time temperature data of the power equipment to be tested. The passive radio frequency temperature electronic sensor includes an antenna for wirelessly transmitting data. The antenna wirelessly transmits the real-time temperature data and the sensor chip identification code corresponding to the temperature data to the data acquisition and transmission module; Data collection and transmission: The IoT data gateway is used to wirelessly receive the real-time temperature data and the sensor chip identification code in real time, and the received data is sent to the data processing module through the 5G network; Data processing: Acquire the data sent by the data acquisition and transmission module; set the temperature alarm threshold, and automatically alarm when the real-time temperature data exceeds the temperature alarm threshold; when an automatic alarm occurs, the data processing module sends a maintenance task notification to the operation and maintenance personnel, and the operation and maintenance personnel lock the alarm device and the temperature sensor that generates the alarm according to the sensor chip identification code to achieve the purpose of fast and intelligent operation and maintenance.

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