Journal of Electrical Engineering : Volume 17 / 2017 - Edition : 2

A SIMPLE AND EFFICIENT COMBINED TECHNIQUE FOR OPTIMAL PLACING AND SIZING OF MULTIPLE DG UNITS IN RADIAL DISTRIBUTION SYSTEM

Authors:
M.JEGADEESAN
C.K.BABULAL
Domain:
industrial electrical power systems
Abstract:
As the use of Distributed Generation (DG) units increase in distribution networks, optimal placing and sizing of DGs have become important, to reduce the losses and improve the voltage profile. Moreover, higher loss reduction and better voltage profile are also obtained, when DGs supply reactive power along real power. This paper proposes a two phase combined method for optimal placement of single and multiple DG units capable of supplying either real (Type-I) or both real and reactive power (Type-III) and hence reducing real power losses and improve the voltage profile. To reduce the search space, potential candidate buses are selected for the placement of DGs, using a Fuzzy Logic system in the first phase of the combined method. In the second phase, optimal locations and sizes of DGs are obtained by the Differential Evolution algorithm. The proposed method is implemented in IEEE 33-bus and IEEE 69-bus radial distribution systems and the results are compared with F-BSOA, LSF-SA and CLS-MINLP methods using two phase combined method for optimal placing and sizing of DGs in Radial Distribution System (RDS). Test results show that the proposed method is very simple, more effective and has a higher capability in finding minimum real power losses and better voltage profile in RDS.
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