Thunder and lightning, heavy rain, wind, blizzard and other inclement weather, will not only bring inconvenience to the inspectors travel, but also may lead to increased risk of line failure, especially lightning discharge will produce extremely high voltage, can be as high as millions of volts or even higher, outdoor overhead transmission line insulators and other insulating equipment in the face of lightning over-voltage, its insulating performance will be a serious challenge, when the lightning over-voltage exceeds the level of insulator voltage withstand When the lightning overvoltage exceeds the insulator's voltage withstand level, it will lead to insulation breakdown, so that the insulator loses its insulating effect. At the same time, lightning may also trigger line flashover, that is, along the insulator surface or air gap discharge phenomenon, the formation of conductive channels, resulting in line short-circuit failure.

In the face of long transmission lines, inspectors need to invest a lot of time and manpower to check each tower one by one. For this reason, Shenzhen Dingxin Intelligent Technology Co. brings the transmission line fault monitoring system - transmission line abnormal state Integrated Monitoring and Diagnostic Device (Distributed Fault Diagnostic Device) DX-WPS100-GZ01 realizes the real-time detection and diagnosis of fault type, fault time and fault location in an efficient, intelligent way.

Transmission line abnormal state integration monitoring and diagnostic device monitoring terminal to take distributed installation, conductor direct measurement, based on the principle of traveling wave positioning technology, real-time monitoring and collection of all types of traveling wave current in the line, real-time positioning and accurate location of lightning fault points and other non-lightning faults, and to carry out specific analysis, through the WEB and the next diagnostic results.

Principles of Traveling Wave Positioning Technology

Traveling wave positioning technology is rooted in traveling wave theory. When the transmission line fault, the fault point is like a signal source, instantaneous excitation to the line on both sides of the rapid propagation of traveling wave signals, and when the traveling wave in the propagation of the impedance discontinuity encountered on the way, like the end of the line, the branch point or the fault point itself, there will be a wonderful physical phenomenon  - reflection and transmission. Transmission line abnormal state integrated monitoring and diagnostic device is the use of this feature, through the measurement of the traveling wave arrives at the measurement point of the time difference, combined with the known line speed and other parameters, the use of complex and subtle mathematical operations, and ultimately to be able to accurately calculate the fault in the transmission line in the specific location of the line.

In addition, the device is equipped with a powerful system of intelligent identification capabilities, can automatically and identify such as lightning, wind bias discharge, fire, tree barriers and other complex fault types. What's more, it is also able to clearly identify lightning strike bypass faults and counter strike faults, with an accuracy rate of up to  95% above, which provides an extremely powerful support for the subsequent fault handling work and enables the operation and maintenance personnel to take targeted measures in a targeted manner.