DANSK DSF/IEC TR 61850-90-21 ED1 PDF

The travelling wave technique for locating faults in transmission, distribution and cable network system has been maturing in recent years due to the advancement in technology. The technique is potentially more accurate and has a much wider application scope when compared with the traditional impedance- based method. However, the technique and its associated information exchange have not yet been fully modelled in IEC 61850. There is a need to do this so that the equipment can be integrated with other IEC 61850 compliant equipment, both in the substation level and in the network level.