| Abstract | This paper proposes a procedure to solve the
optimal reactive power management (ORPM) problem based
on a multi-objective function by using a modified differential
evolution algorithm (MDEA). The proposed MDEA is
investigated in order to enhance the voltage profile as well as
to reduce active power losses by solving the ORPM problem.
The objective function aims to minimize the transmission
power losses and voltage deviation considering the system
equality and inequality constraints. The MDEA aims to
enhance the convergence characteristic of the differential
evolution algorithm through updating scaling factor every
generation and to efficiently eliminate the trapping in local
optimal. In addition, a strategy is investigated to update the
penalty factor to alleviate the effects of constraints violation
and to ensure satisfying all inequality constraints. Numerical
applications for different case studies are carried out on
standard IEEE 30-bus test system. Thus, the transmission
power losses in the system will be minimized and the voltage
profile will be improved. The obtained results show the
effectiveness of proposed enhanced optimization algorithm as
an alternative optimization technique implemented with good
performance characteristic |