| Korea Electric Power Corporation (KEPCO) has developed an expert
system for load transfer analysis in power distribution systems
since 1988.
When faults occur in power lines due to stormy weather conditions,
traffic accidents, etc, automatic breakers between some sections
of the power line are installed for protection against overcurrent
and the reduce outage areas. Once faults occur, the system dispatcher
tries to find the place where faults occur and to minimize the outage
areas during the fault restoration by isolating the faulted portion
through load transfer from other neighbor feeders.
Load transfer is not only needed to energize areas not affected by
the work in progress during the outage, but also needed to investigate
the possibility of load transfer in advance through contingency analysis
before faults occur.
For optimal load transfer the system dispatcher has to look over the
system configuration, select the neighbor feeders by considering
distribution system constraints such as main transformer capacity
and decide the status (open, close) of breakers to be operated for
load transfer. This decision-making process is very involved.
The expert system integrated by Korea Infornet Co., Ltd. is inplemented
on workstations by Sun Microsystems using Korean OSF/Motif by Trigem
Computer, Inc. and IF/Prolog.
The system is now in field operation at KEPCO.
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