SummaryHigh-voltage switchgear is a crucial component in ensuring the stable and safe operation of the power system. The operational status of high-voltage switchgear is extremely critical, as excessive temperatures can gradually wear down its electrical equipment. Analysis10kV High-Voltage Switchgear Wireless Temperature Measurement Technology, discussing the design, technical features, and working principle of the 10kV high-voltage switchgear wireless temperature measurement system, and summarizing the application of wireless temperature measurement technology in 10kV high-voltage switchgear.
Electrical equipment; high-voltage switchgear; wireless temperature measurement technology
One,Overall Design of a 10kV High-Voltage Switchgear Wireless Temperature Measurement System
1. Overall Design
This article selectsThe KYN type switchgear is the subject of study, with K, Y, and N representing armored metal-enclosed switchgear, mobile structure, and indoor installation, respectively. In accordance with the safety operation requirements of the 10kV high-voltage switchgear, the overall design of the 10kV high-voltage switchgearPlease provide the Chinese content you would like translated.Volume, insulation performance, cost, and reliability are considered. System design analysis is primarilyThe design consists of three parts: the high-voltage measurement transmitter, the low-voltage receiving end, and the upper computer data processing and control. This design takes into account the six plum blossom terminals of the KYN type switchgear and provides470 MHz wirelessData Transmission Channel. Due to the selection ofCT Transformers as the power source on the high-voltage sideThe ATE400 temperature sensor measures the contact tip temperature, enabling the system to accurately reflect changes in the tip temperature.
2. Selection of Temperature Sensors
Temperature sensors commonly used in general industrial settings include thermocouple temperature sensors, thermistor temperature sensors, integrated temperature sensors, and more. By integrating multiple sensors, it is discovered that each sensor has a distinct temperature measurement range. The clear temperature measurement range values can help understand the degree to which the sensor adapts to changes in temperature environments. Considering design costs and complexity, most10kV high-voltage switchgear wireless temperature measurement systems are commonly chosen for application.The ATE400 temperature sensor is popular due to its affordable pricing, high-precision measurement capabilities, straightforward temperature measurement route, and convenient expandability.
3. Selection of Signal Transmission Methods for High and Low Voltage Sides
The choice of wireless signal transmission method to some extent determinesThe level of excellence in the design of a 10kV high-voltage switchgear wireless temperature measurement system. The wireless signal transmission methods include Bluetooth technology and infrared technology, among others. However, due to the varying interference resistance and power consumption of different technologies, the 10kV high-voltage switchgear wireless temperature measurement system primarily opts for Bluetooth technology for wireless signal transmission.
4. Selection of High-Voltage Supply Method
The high-voltage circuit in the power supply room must meet requirements for uninterrupted power supply, strong anti-interference capabilities, and high stability output. The current power supply methods mainly include laser power supply and solar power supply.CT transformers are powered by both power supply and battery supply. However, the 10kV high-voltage switchgear wireless temperature measurement system primarily utilizes the power supply method of CT transformers due to their ability to better meet the various demand points on the high-voltage side of the circuit. Additionally, CT transformers offer advantages such as structural safety, mature application, and an excellent operating environment.
Two,The Principle of the 10kV High-Voltage Switchgear Wireless Temperature Sensing Sensor
1. Principle of Wireless Temperature Measurement
Combining various temperature sensing elements for temperature measurement is the principle of wireless temperature sensing. These elements include thermistor temperature sensors, infrared temperature sensors, semiconductor sensors, acousto-optic temperature sensors, and passive wireless temperature sensors.
Thermistor Temperature Sensor
As the temperature changes, so does its resistance, varying to different extents—the principle behind thermistor temperature sensors. Conversely, the temperature can be determined by the size of the resistance. Its advantages are its high sensitivity, but the disadvantage is that the linear relationship between the thermistor resistance and temperature worsens, further leading to component aging and shortening the lifespan of the thermistor temperature sensor. Additionally, prolonged use can degrade the accuracy and stability of temperature measurement.
3. Infrared temperature sensor
The blackbody radiation law is the principle behind infrared temperature sensors, which states that any object with a temperature above0P emits infrared radiation involuntarily. Its feature is the application of non-contact measurement, which means the measuring probe and the object being measured do not require obstructions or multiple insulation treatments. However, infrared temperature sensors are highly susceptible to temperature and humidity...
Due to factors such as temperature and radiation, there has been an accuracy deviation in temperature measurement.
4. Semiconductor Sensors
PN acts as a temperature sensing element, with its resistance value changing with temperature fluctuations. By enhancing the constant current and combining it with the current magnitude during operation, the temperature of the high-voltage switchgear is measured. Although this method offers high temperature accuracy, its overall sensitivity is not as high as thermistors due to its longer response time. However, semiconductor sensors are less prone to aging and have a longer overall lifespan, thus providing higher reliability.
5. Acoustic Surface Temperature Sensor
The acoustic surface wave temperature sensor features a unique measurement method, which is passive measurement. It can utilize wireless transmission to measure the specific temperature of high-voltage switchgear. Its overall advantage lies in its compact size and the fact that it does not require a power source. However, the transmission distance is limited, and there must be no obstructions during the entire transmission process. Otherwise, it is prone to displacement and vibration, which can easily cause changes in the acoustic surface phase, affecting the accuracy of the temperature measurement.
6. Passive Wireless Temperature Sensor
Energy harvesting techniques are employed to meet the energy requirements of passive wireless temperature sensors, thereby fully eliminating the need for traditional batteries and...CT Power Supply Method. The entire passive wireless temperature sensor boasts safety and reliability.The entire energy harvesting technology is pollution-free and boasts benefits such as recyclability and low energy consumption. As a result, the development of future wireless temperature measurement systems will largely be based on microelectronics and low-power technologies, presenting various methods akin to passive wireless temperature sensors.
III. Technical Features of the Wireless Temperature Measurement System
1. Safety
The independent potential insulation installation of the wireless temperature measurement system is capable of effectively mitigating the adverse effects of its tracking arc, and it also enhances the safety performance of electrical equipment. Consequently, the technology of the entire wireless temperature measurement system presents a high level of safety.
2. Precision
The majority of components used in wireless temperature measurement systems are high-precision digital sensors, which undoubtedly confirms that the majority of temperature measurement methods are contact-based. The position of the entire sensor is extremely close to the heat source, allowing for the rapid determination of temperature changes at the temperature point, demonstrating the overall measurement accuracy of the wireless temperature measurement system.
Flexibility
Due to the compact size of the wireless temperature sensing device, the installation process is extremely convenient, and the network setup is highly flexible, allowing for both wireless and wired network connections. The small size of the device also facilitates the installation of multiple monitoring points and the acquisition of measurement data.
4. Usability
The entire operation platform of the wireless temperature measurement system is primarily designed with modularization, making it more convenient to connect to the network and achieve an automated control system, with the overall usability also being more convenient.
5. Low power consumption
The low-power design concept applied to wireless temperature measurement achieves normal temperature sensing while extending the service life of wireless temperature sensors.
FourApplication of Wireless Temperature Measurement Technology in 10kV High-Voltage Switchgear
Currently, numerous enterprises, research institutions, and departments in our country have developed various types of10kV High-Voltage Switchgear Wireless Temperature Online Detection and Measurement System. For instance, a certain company has already developed a special device, which, from a normal perspective, is a non-contact temperature monitoring system. Its primary monitoring function is to continuously monitor the temperature of a specific location within the distribution switchgear, and this monitored location is a critical part of the entire 10kV high-voltage switchgear. The purpose of monitoring this location is to obtainAccuracy EnhancedHigh operational status and temperature, with its non-contact temperature monitoring system also monitoring the circuit breaker's status. The entire non-contact temperature monitoring system utilizes components such as quartz crystal surface acoustic wave elements. As is well-known, quartz crystal surface acoustic wave elements are applied to...In the 10kV high-voltage switchgear wireless temperature measurement technology, the temperature-sensitive element is primarily used. This element is directly affixed to the point to be measured. The 10kV high-voltage switchgear composed of temperature-sensitive elements forms an oscillating circuit that outputs frequency signals related to temperature. The application of 10kV high-voltage switchgear wireless temperature measurement technology fully meets the system requirements and leverages its digital characteristics, further suppressing the interference of strong electric fields to achieve overheat alarms. Additionally, monitoring equipment can utilize microcomputer networking to achieve centralized monitoring.。
No Chinese content provided.The wireless temperature measurement system in the 10kV high-voltage switchgear boasts significant advantages, such as reliable performance, simple structure, compact size, easy installation, and operation. As a result, most 10kV high-voltage switchgear utilizes wireless temperature measurement systems for corresponding temperature monitoring. Moreover, the overall cost of the wireless temperature measurement system is not high, falling within an acceptable price range for consumers. The small, structured design of the wireless temperature measurement module is convenient for adjusting switchgear, allowing for quick installation even if the original cabinet structure remains unchanged. With the correct switchgear accessories and the drilling of appropriate installation holes, quick installation can be achieved. The entire installation process does not affect the performance of the original switchgear's wireless temperature measurement system, particularly its insulation performance, which remains excellent throughout the installation. The safe production of the smart grid is a vast and complex engineering project. Through continuous development of the engineering system, it has been clearly established that the system engineering is a prerequisite for reform and innovation for power companies and society as a whole, constantly driving the development of China's smart grid. As early as 2006, China issued several important documents on the safe use of system power equipment, clearly recognizing the priority for development and implementation in the field of smart grid security. Currently, China is in a period of economic growth, and the power supply capacity of the power grid has been unable to meet the daily living and production needs of residents and society. Therefore,No Chinese content provided, nothing to translate.Increasing the power supply of the power grid, however, may lead to hidden hazards in electrical equipment, particularly for the endpoints of the smart grid.10kV high-voltage switchgear. Therefore, ensuring the safety of high-voltage switchgear is crucial to further enhance the effect of power grid temperature monitoring.
Ankorree's Online Temperature Monitoring System Solution
1. Overview
The electrical contact online temperature measurement device is suitable for temperature monitoring of equipment such as cable joints, circuit breaker contacts, knife switches, high-voltage cable intermediate heads, dry transformers, and low-voltage high-current devices within high and low voltage switch cabinets. It prevents safety hazards caused by excessive contact resistance and heat generation during operation due to factors like oxidation, loosening, and dust. The device enhances equipment safety, timely and continuously reflects the equipment's operational status accurately, and reduces the rate of equipment accidents.
The Acrel-2000T wireless temperature measurement monitoring system communicates directly with equipment at the bay level via RS485 bus or Ethernet. The system design adheres to transmission protocols such as Modbus-RTU, Modbus-TCP, significantly enhancing security, reliability, and openness. The system features remote signaling, measurement, control, adjustment, configuration, event alarms, graphs, bar charts, reports, and user management capabilities. It can monitor the operational status of wireless temperature measurement system equipment, achieve rapid alarm responses, and prevent serious faults from occurring.
2. Application Sites
Temperature monitoring suitable for power equipment in industrial plants such as ubiquitous power IoT, steel mills, chemical plants, cement factories, data centers, airports, power stations, coal mines, and substation transformer stations.
3. System Architecture
4. System Features
Thermometer System HostThe Acrel-2000T is installed in the duty monitoring room, enabling remote monitoring of the operating temperatures and states of all switchgear within the system. The system boasts the following main features:
1）Temperature Display: Shows the real-time values of each temperature measurement point within the power distribution system, also available on computer.Remote data viewing via WEB/mobile APP.
2) Temperature Trend Curves: View the temperature trend curve for each temperature sensing point.
3) Operation Reports: Query and print temperature data at various temperature sensing points over time.
4）Real-time Alerts: The system can issue alerts for abnormal temperatures at various temperature sensing points. It features real-time voice alarm capabilities, enabling voice alerts for all events. The alert methods include pop-up windows, voice alarms, and can also send text messages./App pushes alert messages to notify on-duty staff promptly.
5) Historical Event Query: Stores and manages records of events such as temperature limits, enabling users to trace historical system events and alarms, conduct query statistics, and accident analysis.
5. System Hardware Configuration
Temperature Online Monitoring System mainly consists of temperature sensors at the equipment layer and temperature collectionThe display unit, communication layer's edge computing gateway, and station control layer's temperature measurement system host are integrated to enable online temperature monitoring of critical electrical components in the transformation and distribution system.
Six, Conclusion
No Chinese content provided. Please provide the text to be translated.A deep analysis of the wireless temperature measurement technology for 10kV high-voltage switchgear is conducted, integrating the actual features and development status of the technology with its applications. This aims to ensure the safe and stable operation of the smart grid, while promoting the continuous development of the 10kV high-voltage switchgear wireless temperature measurement technology.
Reference:
［Cui Jinqi. Analysis of Wireless Temperature Measurement Technology for 10kV High-Voltage Switchgear[J]. Communication Power Technology, 2020, 37(005): 45-46
［2Chen Qiujia. Design and Application Analysis of Intelligent Control System for High and Low Voltage Complete Switchgear Equipment[Journal] Technology Information, 2018, 016(004): 6769
［3］AnkoRui Enterprise Microgrid Design and Application ManualMay 2022 Edition
