In the power system, transmission lines bear the important task of power transmission, in order to ensure the safety and stability of transmission lines, the power industry put forward the transmission line "six prevention", that is, anti-lightning, anti-vandalism, anti-fouling flash, anti-bird damage, anti-wind deflection and anti-icing. Below, Shenzhen Dingxin Wisdom Technology for you a simple popularization of several transmission line online monitoring devices, for the "six defense" work to provide Powerful technical support
I. Lightning strike monitoring
Lightning arrester is an important protection equipment for transmission lines, in order to prevent the long term operation of lightning arrester failure to affect the effect of lightning protection, our company has developed a transmission line lightning arrester on-line monitoring device DX-WPS100-BL, through the monitoring of the leakage current, voltage, resistive current, temperature and other parameters of the lightning arrester, real-time understanding of the arrester's working status, as well as predicting and diagnosing the possible failures to improve the level of lightning protection of the line.
II. Monitoring against external damage
In recent years, with the rapid development of economic construction and infrastructure, construction activities around transmission lines have become more and more frequent, and external damage incidents occur from time to time, bringing great challenges to the stable operation of power grids. The following are three kinds of anti-external damage monitoring programs given by Dinstar Intelligent Technology:
1、Laser detector + AI monitoring: laser detection of ultra-high hidden danger, and linkage of video footage sent to the background, timely warning of the hidden danger of external breakage.
2, millimeter wave radar + AI monitoring: the use of millimeter wave radar can be detected in the longitudinal direction of 10 ~ 700m, horizontal 80m within the movement of the external damage hidden danger, and ranging, through the AI image and millimeter wave radar double identification alarm checking, to achieve the external damage hidden danger localization and early warning.
3, LiDAR + AI monitoring: through laser scanning to obtain real-time point cloud data of the transmission channel, to build a three-dimensional model of the field of view of the transmission channel, which can provide fine image and distance measurement, and graded alarm. It is suitable for line hazard ranging, tree barrier height recognition, arc droop monitoring, terrain change judgment and other scenarios.
III. Anti-fouling flash monitoring
Foul flash accidents can lead to line short-circuit, tripping, and may even cause fire, anti-foul flash need to regularly clean insulators and take anti-fouling measures. By measuring the salt density, ash density, temperature and humidity of the insulator surface, the insulator filthiness online monitoring device monitors the insulator filthiness in real time, which facilitates reasonable maintenance measures.
IV. Prevention of bird damage
Bird damage is divided into bird droppings, bird nests, bird body shorting and bird pecking, which need to be targeted to repel birds, and can be added to the transmission line with anti-bird baffles, anti-bird covers, anti-bird spikes, artificial bird nests and other anti-bird devices, but also can be used as laser bird repellents, ultrasonic bird repellents, intelligent integrated bird repellents, bird repellents and other repellent devices, as well as to carry out bird protection publicity and other measures, which can effectively reduce the harm caused by birds to the transmission line, and is also It is conducive to protecting the ecological environment of birds and realizing the harmonious coexistence of power grid and nature.
V. Wind bias monitoring
In strong wind conditions, transmission line conductors will swing and deflect, and when the distance between the conductor and the surrounding trees and buildings is too close, it may cause a discharge accident, leading to line tripping. Wind deflection monitoring can use transmission line arc sag online monitoring device, through real-time monitoring of wire arc sag, distance to ground, inclination and other data, reflecting the line wind deflection situation, and take timely adjustment measures to ensure the safety distance of the conductor in strong wind conditions, reduce the probability of wind deflection accidents, and protect the stable operation of transmission lines.
VI. Anti-icing monitoring
Ice-covering is a common problem for transmission lines in winter and early spring, which may lead to serious accidents such as line breakage and tower collapse. Anti-icing work through the use of advanced ice-covering monitoring technology, the rational design of the line's ice resistance, artificial de-icing and ice melting operations and other measures, can effectively deal with the problem of ice-covering, to ensure the safe operation of transmission lines in snow and ice weather, to ensure the continuity of power supply. The following are three kinds of ice-covering monitoring devices of our Shenzhen Dingsin Wisdom Technology:
1、Equivalent ice-covering monitoring device: with meteorological monitoring, tension monitoring and image video monitoring functions, the system can real-time, real-time measurement and calculation of the thickness and weight of ice-covering on the conductor, simulating the conductor ice-covering;
2. Microwave ice-covering monitoring device: detect the thickness of ice-covering through microwave sensors, and at the same time, monitor the environmental temperature, humidity, wind speed, wind direction and other parameters, and automatically store and upload the data to the backstage, which provides reference for the assessment of the risk of ice-covering;
3.Ice Watch Wizard: With visualization of ice overlay monitoring, it can also be used to monitor ice cover by AIIce Watch Wizard. size: 14px; text-indent: 2em;">AIalgorithm to analyze the thickness of ice cover. At the same time, it can comprehensively monitor various status information of the conductor, including conductor temperature, current, etc., providing real-time data support for ice prevention, de-icing and dynamic capacity increase.
