Abstract
A power distribution system operates most efficiently with voltage
deviations along a feeder kept to a minimum and must ensure all voltages
remain within specified limits. Recently with the increased integration of pho-
tovoltaics, the variable power output has led to increased voltage fluctuations
and violation of operating limits. This paper proposes an optimization model
based on a recently developed heuristic search method, grey wolf optimization,
to coordinate the various distribution controllers. Several different case stud-
ies on IEEE 33 and 69 bus test systems modified by including tap changing
transformers, capacitors and photovoltaic solar panels are performed. Simula-
tion results are compared to two other heuristic based optimization methods:
harmony search and differential evolution. The simulation results show the
effectiveness of the method and indicate the usage of reactive power outputs
of PVs facilitates better voltage magnitude profile.
