In the world of electricity, every hidden danger is like a latent time bomb, once the failure occurs, it may trigger a series of chain reaction, leading to large-scale power outages, which will bring great impact on social production and residents' life. In this critical situation, time is money, time is efficiency. Therefore, fast and accurate location of the fault point, as in the maze of the power system to find the key to safety, has a vital significance. Shenzhen Dingxin Wisdom Technology will discuss in depth the functional role of four Transmission and Distribution Network Fault Locating Devices.
Dingshin Wisdom Distributed Fault Location Device for Transmission Lines
By installing the line fault monitoring device on the three-phase conductors of overhead transmission lines, it collects and analyzes the traveling wave signals at the moment of fault, and realizes the rapid positioning of transmission line faults. Functional characteristics are as follows:
1, online positioning: 7 × 24 hours online monitoring, real-time acquisition of fault traveling wave current signal, fault frequency current signal, storage of waveforms, clock data, positioning error of not more than 150 meters, can be through the text message and the Web client to give warning information;
2, positioning time: no more than 5 minutes, using artificial intelligence deep learning algorithm fault identification program, the fault interval positioning accuracy of more than 95%;
3, clock synchronization: with Beidou high-precision synchronization clock function, synchronization clock calibration error is not greater than 0.1μs;
4, fault identification: according to the fault waveform can automatically identify lightning/non-lightning strike fault, lightning strike fault can be identified around the strike/counterstrike fault.
Dingxin Wisdom Non-contact Fault Location Device for Power Transmission Lines
The use of non-contact magnetic field measurement fault location and identification methods can better meet the requirements of long-distance transmission line fault location.
1, fault location, diagnosis of the nature of the fault, automatic analysis of waveform data, to determine the disturbance or fault; according to proprietary algorithms, to determine the category of fault waveforms, such as lightning strikes, grounding and so on;
2, strong anti-interference ability: the use of faulty traveling wave and high-frequency clutter separation processing technology, through the compensation algorithm to accurately capture the traveling wave head, has a strong anti-clutter interference ability.
Third, high-voltage cable fault location device
Can simultaneously collect 7 high-frequency signals (3 high-frequency current travelling wave, 3 hidden current travelling wave, 1 voltage travelling wave), 8 low-frequency signals (3 industrial frequency current, 4 grounding loop current, 1 voltage), the system analyzes and calculates to realize the positioning of fault section and fault point, and warns of insulation defects in advance of the line discharging hidden danger.
1, fault location: double-ended traveling wave ranging technology to achieve fault location, and in the background interface of the system to indicate the location of the fault point, the fault point is marked, positioning accuracy ≦ L * 0.5% +5m (L is the length of the cable);
2, fault early warning: can realize the defects of the cable joints, the body of the hidden danger warning, early detection of potential fault points, improve the efficiency of fault detection.
Four, distribution network traveling wave fault location device
Based on the traveling wave positioning principle, it determines whether there is a fault risk on the line through high-precision sensors and advanced signal processing algorithms, and provides accurate fault information for operation and maintenance personnel, including fault time, fault distance, fault type and tower number, to improve the efficiency of fault handling.
1, fault recording: fault occurs, can record not less than 4 weeks before the start, start 8 weeks after the wave, and support the response to the current time 0.5h within any moment waveform call for fault judgment;
2, fault location, routing: can accurately locate the fault zone and fault point, the error does not exceed 150 meters, while small current grounding fault routing can be realized, including metallic grounding, arcing grounding, low-resistance grounding, high-resistance grounding (3kΩ) and so on;
3, hidden danger early warning: according to the collection of high-frequency discharge traveling wave waveform data can be realized insulation defects discharge early warning, to prevent the occurrence of faults;
Failure Alert: When a failure is detected, the system will notify the operation and maintenance personnel in time through SMS, WEB posting and other means.
