  In smart grid, the demand side management (DSM) techniques need to be
designed to process a large number of controllable loads of several types. In
this paper, we proposed a framework to study the demand side management in
smart grid which contains a variety of loads in two service areas, one with
multiple residential households, and one bus with commercial customers.
Specifically, each household may have renewable generation as well as
interruptible and uninterruptible appliances to make individual scheduling to
optimize the electric energy cost by making the best time of the electricity
usage according to the day ahead forecast of electricity prices. A high load
bus represents a commercial area employed to demonstrate the impact of high
load at any bus on voltage profile, power loss, and load flow condition, and to
show the performance of the proposed DSM for large number of appliance. Using
the developed simulation model, we examine the performance of the proposed DSM
and study their impact on the distribution network operation and renewable
generation, overall voltage deviation, real power loss, and possible problems
such as reverse power flows, voltage rise have examined and compared, these
problems can easily be seen at the commercial load bus.
