THE APPLICATION OF SATELLITE TIME REFERENCES TO HVDC FAULT LOCATION

An HVdc fault location scheme is described which relies on very precis e detection of the time of arrival of fault created surges at both end s of the line. Such detection is achieved by a very accurate data acqu isition and processing system combined with the time reference signals provided by a global positioning system receiver. Extensive digital s imulation is carried out to determine the voltage and current waveform s, to identify the main sources of error and suggest possible compensa tion techniques.