Automatic diagnosis system for monitoring short circuit malfunction of electric net in oilfield
Zhu Zhen · 1999
The algorithm for calculating ratio of port voltages in the sound signal source and side circuit is used to diagnosing short circuit malfunction of electric net in oilfield by using the analogue diagnosis theory. The connecting equipment of the system isolates the diagnosis system from the electric power lines with high voltage and couples the measured signal to the lines. The diagnosis is realized by measurement of port voltage and the phase values. The system can determine the location of malfunction and the distance online by measuring the amplitude and phase values of port voltage when malfunction happens.