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[Keywords] Distribution line fault monitoring fault location traveling wave positioning grounding line selection early warning load monitoring  

The operating environment of power lines is poor and the failure rate is high. Power outages often occur due to lightning strikes, external damage, insulation damage, etc.The process of diagnosing faults is both time-consuming and labor-intensive, significantly impacting users' experience of reliable power supply. This solution monitors the power frequency voltage, current, and high-frequency fault traveling waves of the power line, and adopts advanced traveling wave detection technology to achieve functions such as monitoring the discharge of insulation hazards in distribution lines, precise positioning of fault towers, and perfectly solve the problem of selecting and accurately locating common grounding faults.

The monitoring terminal conducts real-time online monitoring of traveling wave and power frequency signal data on the power line. The collected data is aggregated, preprocessed, and subjected to edge computing by the aggregation unit before being encrypted and transmitted to the distribution automation master station. This enables functions such as load monitoring, ground fault line selection, fault location, and insulation hazard early warning. Diagnostic results are accessible via web and SMS interfaces.

l Technical indicators

positioning accuracy：≤±200m

Fault interval localization accuracy：≥95%

positioning accuracy：≥90%

Lightning identification accuracy：≥90%

Grounding fault line selection accuracy：≥90%

Insulation hazard monitoring accuracy：≥90%

Power supply: Coupling + Solar power + Backup battery

l Application

Applicable to various scenarios of distribution network lines with voltage levels ranging from 6-20kV, this system is extensively employed in long transmission lines with high failure rates, frequent skipping lines, and lines with strong fault concealment, difficult troubleshooting, and complex operating environments. It enhances the distribution network's ability to provide early warnings and precise fault localization.