Lightning is an awesome energy release phenomenon in nature, in the Earth's atmosphere, there are about 45 lightning occurrences per second, basically a complete lightning process releases energy at an instantaneous temperature of up to 30,000 degrees Celsius, a value that is five times that of the sun's surface temperature.What really poses a threat to the power grid is the overvoltage and strong current generated when lightning strikes an object.Essentially, it is the impact and destruction of super-strong electromagnetic energy on the power system.From the end of the 19th century, the birth of the power grid, lightning has become a threat to the reliability of power supply of the main natural factors, in the long term, its damage path and the degree of harm with the expansion of the grid scale and increasingly complex.
The negative impacts caused by lightning strikes, exposed in the wilderness overhead lines "bear the brunt", direct lightning overvoltage may penetrate the insulators, resulting in line short-circuit tripping; in addition, even if lightning does not directly hit the line, its powerful electromagnetic field changes will be induced in the conductor thousands of volts of over-voltage, along the line propagation, intrusion into the substation or the user side of the equipment.equipment on the substation or subscriber side.According to the State Grid data, lightning caused by 110kV and above line tripping accidents accounted for 30% to 50% of the total, in the strong minefield this proportion can be as high as 70%.
In the power grid and lightning confrontation, lightning arrester as the "gatekeeper", always standing in the forefront of defense, so for the hidden dangers of lightning arrester detection is also more urgent, Shenzhen Dingxin Wisdom Technology Co.Lightning arrester full current, resistive current, capacitive current and other key parameters for real-time online monitoring, to ensure the timeliness and accuracy of the data.Through the use of modern digital signal processing technology, the device is able to analyze and fit the monitored data in depth, thus revealing the inner operating state of the arrester.
As an intelligent online monitoring system, it also has a powerful early warning function.It can combine with on-site working conditions to discover possible problems with surge arresters in time.With the high proportion of new energy access and the extension of extra-high voltage grid, lightning protection is facing new challenges, so the real-time perception of the status of the online lightning arrester monitoring system is becoming more and more important.
