Lightning is a powerful natural phenomenon. When lightning strikes directly at transmission lines, substations and other facilities in the power grid, it releases extremely high energy, and the amplitude of the lightning current can be in the range of thousands to hundreds of kiloamps. In general, the common lightning current amplitude is about 20 - 50 kA. However, in some extreme cases, the amplitude of lightning current can exceed 200 kA. Such large currents, when passing instantaneously through transmission lines or substation equipment, produce strong thermal and electromagnetic effects.
Lightning arrester is a transmission line lightning protection important equipment, can limit the line lightning overvoltage, improve the line lightning level, reduce the system due to lightning faults caused by the tripping rate. However, due to transmission line lightning arrester in operation for a long time to withstand all kinds of overvoltage and the impact of the site environment, inevitably will gradually aging. The lightning arrester will be gradually aging, which will lead to performance degradation or damage of the lightning arrester. Based on this, our company has developed a transmission line surge arrester online monitoring device, which is particularly important for lightning protection in areas with many thunderstorms or particularly strong lightning activities.
Importance of transmission line arrester online monitoring device DX-WPS100-BL
1, centralized management: the device is connected in series in the lightning arrester grounding circuit, can be installed to each group of lightning arrester, to achieve centralized management;
2, real-time monitoring: through real-time monitoring of lightning arrester leakage current, resistive current, the number of lightning strikes, lightning strike time and other parameters, wireless uploaded to the monitoring center, timely detection of lightning arrester defects and hidden danger, to avoid equipment failure;
3, extend the maintenance interval: monitoring platform with a friendly user interface and powerful data processing capabilities, through the long-term monitoring data accumulation, can provide important data basis for line arrester condition maintenance, reduce the number of power outages and time for maintenance, improve equipment utilization.
Technical characteristics
1, power supply: solar power and environmentally friendly lithium battery power supply, intelligent SOC control to ensure stable power supply;
2、Low power consumption: low-power management is adopted to send lightning arrester monitoring data periodically and lightning strike action data in real time;
3, endurance: the system runs 24 hours uninterrupted work, in the absence of light, the battery pack can meet more than 15 days of operation;
4, data transmission: using radio frequency 2.4G wireless way to transmit data to the data receiving device, the data receiving device through GPRS will be transmitted to the data center.
Technical Parameters
1, lightning arrester warning leakage current: 1mA
2, lightning arrester leakage full current measurement error: <5%
3、Acting current：8/20μs inrush current 50A
4. Electromagnetic compatibility: immunity evaluation level A
GSM/GPRS network RF band: EGSM 900MHz, GSM 1800MHz
