Heuristic Optimization Approaches for Capacitor Sizing and Placement: A Case Study in Kazakhstan

Olzhas Baimakhanov, Hande Şenyüz, Almaz Saukhimov and Oğuzhan Ceylan
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Olzhas Baimakhanov: Electrical Power Systems Department, Almaty University of Power Engineering & Telecommunications Named after G. Daukeyev, Almaty 480013, Kazakhstan
Hande Şenyüz: Management Information Systems Department, Kadir Has University, Istanbul 34083, Turkey
Almaz Saukhimov: Electrical Power Systems Department, Almaty University of Power Engineering & Telecommunications Named after G. Daukeyev, Almaty 480013, Kazakhstan
Oğuzhan Ceylan: Electrical and Electronics Engineering Department, Marmara University, Istanbul 34854, Turkey

Energies, 2022, vol. 15, issue 9, 1-16

Abstract: Two methods for estimating the near-optimal positions and sizes of capacitors in radial distribution networks are presented. The first model assumes fixed-size capacitors, while the second model assumes controllable variable-size capacitors by changing the tap positions. In the second model, we limit the number of changes in capacitor size. In both approaches, the models consider many load scenarios and aim to obtain better voltage profiles by minimizing voltage deviations and active power losses. We use two recently developed heuristic algorithms called Salp Swarm Optimization algorithm (SSA) and Dragonfly algorithm (DA) to solve the proposed optimization models. We performed numerical simulations using data by modifying an actual distribution network in Almaty, Kazakhstan. To mimic various load scenarios, we start with the baseline load values and produce random variations. For the first model, the optimization algorithms identify the near-optimal positioning and sizes of fixed-size capacitors. Since the second model assumes variable-size capacitors, the algorithms also decide the tap positions for this case. Comparative analysis of the heuristic algorithms shows that the DA and SSA algorithms give similar results in solving the two optimization models: the former gives a slightly better voltage profile and lower active power losses.

Keywords: smart grid; optimization; capacitor allocation and sizing problem; heuristic methods (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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