International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Call for Paper Volume 8, Issue 4 (July-August 2026) Submit your research before last 3 days of August to publish your research paper in the issue of July-August.
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Volume 8 Issue 4
July-August 2026

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Optimal Placement and Sizing of Distributed Generation in IEEE 33-Bus Distribution System Using Ant Colony Optimization

Author(s) Dr. Anantha Lakshmi Vuyyuru, Dr. Rama Mohan Y, Dr. Satheesh G
Country India
Abstract Integrating Distributed Generation (DG) units into radial distribution networks plays a pivotal role in reducing active powerlosses, improving bus voltage profiles, and enhancing overall grid reliability. However, inappropriate placement or sizing of DGunits can exacerbate power losses and cause severe voltage deviations. This paper presents a comprehensive methodology fordetermining the optimal locations and capacities of DG units operating at unity power factor within the standard IEEE 33-busradial distribution network. The optimization problem is formulated to minimize active power losses (Ploss) while strictly adheringto operational constraints, including bus voltage limits, line thermal capacities, and total allowable DG penetration. The nonlinear discrete-continuous search space is solved using an adapted Ant Colony Optimization (ACO) algorithm combined witha Backward/Forward Sweep (BFS) load flow solver. Comparative evaluation demonstrates that placing three optimal DG units
reduces active power losses by 64.67% (from 202.68 kW to 71.60 kW) and elevates the minimum system voltage from 0.9130 p.u.to 0.9684 p.u
Keywords Distributed Generation (DG), IEEE 33-Bus System, Ant Colony Optimization (ACO), Power Loss Minimization, Back ward/Forward Sweep Load Flow, Voltage Profile Improvement.
Field Engineering
Published In Volume 8, Issue 4, July-August 2026
Published On 2026-08-08
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E-ISSN 2582-2160
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CrossRef DOI prefix of IJFMR is 10.36948/ijfmr

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