文档介绍：Characterization of Distribution Systems
Overcurrents Using Expert Systems
umptions are made in the design and
overloads or cold load pick-up, and switching events). application of distribution of equipment. Theoretical
Pertinent parameters (frequency of occurrence, magnitude,
2 maximum fault current magnitudes can be calculated using
peak current, rms current, duration, I t and time constant) were the distribution system impedances. The impedance of the
measured or computed.
fault arc itself is seldom known and is accounted for by
Index Terms – Expert Systems, Distribution System, assumptions such as adding an assumed arc impedance.
Overcurrent, Fault, Inrush, Protection There is a need for comparing such calculations with actual
measured data. The statistical variations of current
I. INTRODUCTION magnitudes, durations, and dc offsets are generally unknown.
Very little is known about the harmonic components of most
Overcurrents on distribution systems include permanent overcurrents.
faults, temporary faults and other lower