Introduction
Deregulation in the power market
has encouraged the move towards
distributed generation, where many smaller
generating plants located close to major
loads, as opposed to a few large centrally
located power stations, are penetrating into
interconnected power systems. Nowadays,
generating electricity using decentralized
generators of relatively small scale is
attracting a great interest from electric
energy researchers. Such kind of
generation is known as Distributed
Generation Systems (DGS).
Main aim of using large amount of DGS in
the future is to increase system reliability
and lower the cost of power through the
use of on-site generation. Since the DGS
Penetration Level (PL) is still low (DG
power generated less than 20% of power
consumption in a sub-grid), the technical
problems related to DG are limited to
voltage profile support and control of
interfacing conversion devices. When PL
increases, several other problems will need
to be faced and solved. Stability and
quality of electrical energy problems may
arise, new planning tools will be needed,