Optimal Siting and Sizing of Multiple Distributed Generation Units in Radial Distribution System Using Ant Lion Optimiza
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ORIGINAL ARTICLE
Optimal Siting and Sizing of Multiple Distributed Generation Units in Radial Distribution System Using Ant Lion Optimization Algorithm Rajakumar Palanisamy1 · Senthil Kumar Muthusamy1 Received: 4 January 2019 / Revised: 14 February 2020 / Accepted: 30 September 2020 © The Korean Institute of Electrical Engineers 2020
Abstract The installation of distributed generation (DG) units with optimal capacities at optimal locations is becoming an essential issue in a distribution power network to reduce total power loss and to enhance voltage profile. In this paper, a recently included optimization technique called ant lion optimizer (ALO) has been presented for assessing the optimal size of multiple DG units in a balanced radial distribution system. An integrated methodology of loss sensitivity factor and voltage sensitivity factor is utilized for finding the optimal bus locations for the multiple DG unit installation. The optimal size of DG units at the identified bus locations are computed using ALO algorithm by minimizing the total real power loss of distribution network. The minimization of total real power loss will lead to considerable enhancement in voltage profile. The performance of the proposed algorithm has been evaluated against IEEE 33, 69 and 119 bus balanced radial distribution systems. Furthermore, to outline the superiority of proposed ALO algorithm, the attained results are related with the results of hybrid optimization techniques such as GA-PSO, ABC-CSO and ABC-BAT in terms of total real power reduction and voltage profile improvement. Keywords Radial distribution network · Distributed generation · Loss sensitivity factor · Voltage sensitivity factor · Ant lion optimization
1 Introduction Distributed generation or dispersed generation is a small scale power generation where power generation takes place at or near the load centre [1]. Typical DG units are generally rated from few kilowatts to few megawatts. Presently solar photovoltaic, wind turbine generator, small hydro, biomass, gas turbine, etc., are used as DG technologies. The role of DGs is to inject real and reactive power into the distribution power network. Inclusion of the DG unit offers numerous benefits to electric utilities and consumers [1]. Among the available DG technologies, renewable energy based DG units are capable of minimizing the greenhouse gases emission which is responsible for global warming. Moreover, DG units provide significant economic and technical benefits such as deferred transmission and distribution investment, line loss reduction and voltage profile
* Rajakumar Palanisamy [email protected] 1
Sona College of Technology, Salem, Tamil Nadu, India
enhancement [1]. Furthermore, DG units give saving on fuel investment and thus minimize the electricity prices. Also, DG units improve the voltage stability and voltage stability margin of the system [2]. The aforementioned benefits can be availed only by selecting the optimal site and size of DG units. On the other hand, inappropriate placement
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