Abstract
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The seamless integration of renewable distributed
generation (DG) units into distribution system has become one
of the most challenging research aspects in the recent years. The
systematic deployment of renewable DG units can improve
distribution system performance in terms of voltage support,
loss minimisation, emission reduction, and reliability
improvement. It is important to consider technical and economic
incentives with the integration of renewable DG units. In this
paper, a multi-objective distribution system expansion planning
model with integration of renewable DG units is presented. It
proposes comprehensive approach to address multiple
conflicting objectives without loosing generality. A problemspecific
particle swarm optimisation (PSO) based search method
is used to solve the formulated planning problem. Scenario
based studies are performed to examine the impacts of different
DG allocations on system reliability and the investment cost of
system reinforcement.