Views: 0 Author: Site Editor Publish Time: 2024-11-27 Origin: Site
Temperature monitoring is crucial during the operation of substations. The key principle for ensuring the safe operation of electrical equipment is to proactively predict and prevent potential issues, and temperature monitoring is a key component in achieving this. Substations, as vital parts of the power system, have electrical equipment that generates heat during operation. Without timely temperature monitoring, this could lead to severe safety incidents.
Wireless temperature measurement equipment plays a significant role in ensuring the safety of substations. First, it allows for real-time online monitoring, continuously collecting temperature data 24 hours a day and promptly detecting abnormal temperature conditions. For example, the wireless temperature measurement system from Tien Technology uses temperature sensors installed at heat-prone points. Data is transmitted wirelessly to the backend, and temperature changes can even be monitored on mobile devices anytime and anywhere, allowing issues to be addressed in a timely manner. Additionally, wireless temperature measurement equipment provides high measurement accuracy. It employs advanced sensor technology to comprehensively monitor the temperature of equipment, eliminating human error and providing reliable data support for safe equipment operation. Moreover, wireless temperature measurement equipment is cost-effective, safe, and reliable. Compared to traditional temperature measurement methods, it requires no manual intervention, reducing safety risks and lowering costs. For example, the wireless temperature measurement system developed by Woreya adopts a centralized reception and display solution, significantly reducing installation work and time. This makes it advantageous for both new substation constructions and temperature measurement modifications for critical substations.
Wireless temperature measurement equipment uses advanced and mature sensing technologies along with unique wireless communication methods to address the issue of temperature monitoring at electrical contacts in power plants and substations. After real-time monitoring of temperatures at various points, data is transmitted wirelessly to local temperature display devices, with over-temperature alarms enabled. It can also be connected to power automation systems for remote monitoring of equipment temperatures, allowing for early detection of anomalies and remote alarms to address potential hazards.
Wireless temperature measurement equipment has various power supply methods. Online power supply and solar power significantly extend the service life of the devices. For instance, some wireless temperature sensors are powered by online or solar power, with service life extending over 8 years. This method enhances the operational longevity of the wireless temperature measurement system in substations.
Wireless temperature measurement equipment is equipped with temperature alarm thresholds. If the collected temperature data exceeds the set alarm threshold, an alarm will be triggered on the monitoring interface, accompanied by sound and light alerts. Additionally, SMS notifications are sent to relevant personnel. This improves the efficiency of equipment management and enables fully integrated information management.
Wireless temperature measurement sensors transmit not only the measured temperatures but also their unique IDs. The system automatically associates the temperature with the corresponding monitoring point based on the database, improving the automation of the system.
The sensor and measurement terminal are wirelessly connected, which simplifies system installation and maintenance, and reduces interference with the safety of the power grid. For example, when installing wireless temperature measurement devices in switch cabinets, no wiring is required, preserving the original structure and performance of the cabinets.
Wireless temperature measurement equipment provides 24-hour continuous monitoring. Sensors automatically send temperature data to the computer every hour (this interval can be preset). The system collects and records all temperature data in real time, with alarms triggered for anomalies, ensuring immediate response.
Wireless temperature measurement equipment operates on frequencies such as 433 MHz and 915 MHz within the ISM band. It is harmless to humans and does not interfere with surrounding equipment, meeting the standards of the FCC and national wireless regulations.
Wireless temperature measurement equipment offers trend analysis capabilities. It performs real-time analysis on temperature data from each monitored point and stores the data for extended periods. Monitoring points showing a gradual increase in temperature can be preemptively warned before reaching the upper limit, addressing potential risks early.
The temperature sensors of wireless measurement devices are compact, measuring only 8mm by 27mm, making them easy to install on high-voltage cabinets and other equipment. Installation involves simply screwing the device onto the contact point’s bolt, with no need for additional devices or structural changes to the equipment.
Wireless temperature measurement equipment is highly expandable, with no group limitations. Each wireless receiver can accept data from a large number of sensors. For example, some receivers can handle data from up to 90 sensors, while others can handle data from 250 sensors, greatly enhancing the system's scalability and adaptability.
The hardware of a wireless temperature warning system mainly consists of temperature sensors, ultra-low-power microcontrollers, wireless transceivers, power management chips, peripheral circuits, and high-energy batteries.
Temperature Sensors: These sensors provide a measurement accuracy of up to 0.5°C, with the option to adjust resolution and set temperature thresholds for over-temperature alarms. They can also store data for extended periods, ensuring accurate measurement in harsh environments, such as high-voltage substations.
Ultra-Low Power Microcontrollers: These 16-bit mixed-signal processors work within a voltage range of 1.8V to 3.6V and can lower power consumption depending on the working mode. For example, the STM8L series chip used in the system consumes only 200μA/MHz in operating mode and as low as 3μA in sleep mode, with multiple features for optimal performance.
Wireless Transceiver Module: A chip with an ideal point-to-multipoint communication capability, offering a transmission power of 10mW. It can transmit over a distance of 600-800m, using advanced forward error correction to ensure high interference resistance and low error rates.
Power Management Chip: The MAX1726 chip helps manage ultra-low power consumption. It provides a wide range of output voltages (1.8V, 2.5V, 3.3V, 5V) and protects against short circuits, high temperatures, and other issues, significantly extending battery life.
The system adopts a dual-power management approach, managing both temperature sensors and wireless transceivers separately. Temperature sensors and peripheral circuits use a 3.6V, 3000mA battery, which has a long lifespan, while the microcontroller controls power to inactive components to enhance battery life. The system operates at low frequencies to further reduce power consumption.
In addition to hardware optimization, software also plays a crucial role in reducing the system’s power consumption. The system uses interrupt-driven wake-up modes and minimal data retention to ensure low power usage. The wireless sensors are programmed using C language, focusing on clear, efficient code and minimizing power consumption.
At the 110kV Dazhou Substation, which is a key load-bearing station in the Gaoyao power grid, wireless temperature measurement equipment was installed to monitor equipment performance and detect potential safety hazards early. The system monitors 96 temperature points across 8 high-voltage switch cabinets, transmitting data wirelessly and sending alarms when temperature thresholds are exceeded.
In practice, the system provides real-time 24-hour monitoring, instantly identifying temperature anomalies and triggering both visual and audible alarms. SMS alerts are sent to the responsible personnel for quick response, ensuring timely intervention. Additionally, the compact and easy-to-install nature of the sensors significantly reduced installation time and effort.
Wireless temperature measurement equipment enables the real-time monitoring of device temperatures, preventing accidents by issuing early warnings when temperatures exceed safe limits.
Wireless systems provide precise and stable temperature measurements, reducing installation time and effort compared to traditional methods, and offering high measurement accuracy for equipment safety.
Real-time monitoring of equipment temperatures in substations helps ensure safe and stable power supply, reducing faults and improving system reliability.
Wireless temperature measurement systems are cost-effective and require minimal maintenance. With no need for manual intervention or wiring, they reduce both installation and operational costs.
Wireless temperature monitoring improves safety by offering early detection of temperature anomalies, enabling predictive maintenance and reducing the risk of power grid failures.
In conclusion, wireless temperature measurement equipment plays a vital role in maintaining the safety, reliability, and efficiency of power substations, ensuring stable electricity supply and minimizing the risks associated with electrical equipment.
