Abstract:
Though load shedding is not expected in modern days, depending upon the
situation it may become unavoidable to prevent the power system from facing
total blackout or to combat the under frequency problem in contingency situation
or sustained generation deficit in the system. A good load shedding procedure
may decrease the inconvenience when generation is remarkably less than
demand.
In this work an algorithm has been developed to decide in advance or just prior to
the required period a schedule for manual load shedding for 11 kV feeders so
that occurrence of under frequency in thy system is reduced. In this algorithm
emergency power requirement of customers under different feeders, the
individual feeder priority and previous status have been considered. It has also
been considered that a feeder will not be shed for two consecutive time slots.
The algorithm finds the best combination from a set of candidate combinations
(equal to the number of slots) based on several key indices.
The outcome of this study will help the distribution agencies prepare an easy-toimplement
load shedding schedule especially if the number of 11 kV feeders in a
33/11 kV substation is too large to be switched on/off optimally applying only
thumb rules.
