Distributed Intelligent Fault Monitoring System for Transmission Line

System technical indicators 4.1 Technical indicators of the monitoring device l Power supply mode: Inductive coupling power supply mode, line load current range: 16A~1500A; Working hours of backup battery: ≥24h; l Sampling frequency and clock a) Travelling wave sampling frequency: 10 MHz;

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System technical indicators

4.1 Technical indicators of the monitoring device

l Power supply mode: Inductive coupling power supply mode, line load current range: 16A~1500A;

Working hours of backup battery: ≥24h;

l Sampling frequency and clock

a) Travelling wave sampling frequency: 10 MHz;

b) Power frequency sampling frequency: 3 KHz;

c) System time accuracy: 0.1μs;

l Measuring range, accuracy and recording time

a) Traveling wave current measurement range: 5A~5kA (peak value), measurement accuracy: ≤10%

b) Continuous recording time of traveling wave current: ≥3000us;

c) Power frequency current measurement range: 10A~10kA (effective value), measurement accuracy: ≤10%

d) Continuous recording time of power frequency current: ≥500ms

l Protection level: IP66.

4.2 Technical indicators of the background software system

1) Reliability of fault location location: >99%

2) Positioning error of fault location: <300m

3) Accuracy of identification of lightning strikes and non-lightning strikes: >95%

4) Recognition accuracy rate of shielding failure and counterattack failure: >95%

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