International Journal of Advanced Studies in Computer Science and Engineering

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Optimal Distributed Generation Site and Size Allocation for loss reduction and voltage stability enhancement in distribution systems


Affiliations
1 Faculty of Science and Technology, University of Djelfa 17000 DZ, Algeria
2 Faculty of Applied Sciences, University of Ouargla 30000 DZ, Algeria

This paper concentrates on the impacts of distributed generation (DG) placement on the radial distribution system. Distributed generation is a term that refers to the generation of energy close to the point of consumption, in order to improve the performance of the electricity grid. It is a well proven fact that if the DGs units are placed in the right place in the distribution system and operating at optimal size, it will help in reducing the line losses and improving the voltage profile and as a consequence the reliability, stability and efficiency of the electrical system are preserved. In this paper, three types of DG units are considered and both Moth-flame optimization (MFO) and Grasshopper optimization (GOA) are applied to find the optimal DG sizing for a typical radial distribution system (IEEE-85 bus radial distribution test systems). The required location of the DG unit bus is selected using the index vector method (IVM) and the voltage stability index (VSI). The obtained results show that the two algorithms produce very same values. The best result in loss reduction and minimum bus voltage is attained for the DG unit at a power factor of 0.93 when compared to other DG types. However, this requires a large DG versus the other types.
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  • Optimal Distributed Generation Site and Size Allocation for loss reduction and voltage stability enhancement in distribution systems

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Authors

Abderrahmane Amari
Faculty of Science and Technology, University of Djelfa 17000 DZ, Algeria
Sliman M'hamdi
Faculty of Science and Technology, University of Djelfa 17000 DZ, Algeria
Benalia M’hamdi
Faculty of Science and Technology, University of Djelfa 17000 DZ, Algeria
Samir Kherfane
Faculty of Science and Technology, University of Djelfa 17000 DZ, Algeria
Riad Lakhdar Kherfane
Faculty of Applied Sciences, University of Ouargla 30000 DZ, Algeria

Abstract


This paper concentrates on the impacts of distributed generation (DG) placement on the radial distribution system. Distributed generation is a term that refers to the generation of energy close to the point of consumption, in order to improve the performance of the electricity grid. It is a well proven fact that if the DGs units are placed in the right place in the distribution system and operating at optimal size, it will help in reducing the line losses and improving the voltage profile and as a consequence the reliability, stability and efficiency of the electrical system are preserved. In this paper, three types of DG units are considered and both Moth-flame optimization (MFO) and Grasshopper optimization (GOA) are applied to find the optimal DG sizing for a typical radial distribution system (IEEE-85 bus radial distribution test systems). The required location of the DG unit bus is selected using the index vector method (IVM) and the voltage stability index (VSI). The obtained results show that the two algorithms produce very same values. The best result in loss reduction and minimum bus voltage is attained for the DG unit at a power factor of 0.93 when compared to other DG types. However, this requires a large DG versus the other types.