Equilibrium Optimizer Algorithm for Optimal Reactive Power Dispatch

Abstract

Optimal Reactive Power Dispatch (ORPD) is a significant research area in terms of maintaining the reliability and safety of the power system and operating it more economically. ORPD problem can be formed from a variety of perspectives including the minimization of the active power losses and voltage deviation, and improving the voltage stability performance. The majority of methods so as to deal with ORPD problem is meta-heuristic techniques because of the complex, non-linear and non-convex nature of the problem. In this paper, a new physic-based meta-heuristic algorithm, Equilibrium Optimizer (EO), is proposed for ORPD problem to reach the optimal settings of control variables such as voltage magnitudes in PV buses, tap positions of transformers and reactive power support of shunt devices. The introduced algorithm is evaluated on IEEE 30-bus test system by using various objectives, and a comparison of the implemented method to other optimization techniques described in the literature is utilized to assess its efficacy. Simulation results and statistical indicators demonstrate that the EO algorithm validates its computational efficacy and robustness in handling the ORPD problem.

Keywords

• Optimal reactive power dispatch
• Meta-heuristics
• Optimization algorithms
• Equilibrium Optimizer

Optimal Reaktif Güç Dağıtımı için Equilibrium Optimizasyon Algoritması

Abstract

Optimal Reaktif Güç Dağıtımı (ORPD), şebekenin güvenilirliğini ve güvenliğini sağlamak ve güç sistemini daha ekonomik bir şekilde işletmek açısından önemli bir araştırma alanıdır. ORPD problemi, aktif güç kayıplarının ve gerilim sapmasının en aza indirilmesi ve gerilim kararlılık performansının iyileştirilmesi dahil olmak üzere çeşitli açılardan oluşturulabilir. ORPD problemiyle başa çıkmak için kullanılan yöntemlerin çoğu, problemin karmaşık, doğrusal olmayan ve dışbükey olmayan doğası nedeniyle meta-sezgisel tekniklerdir. Bu çalışmada, ORPD probleminin PV baralardaki gerilim büyüklükleri, transformatörlerin kademe pozisyonları ve şönt ekiomanların reaktif güç desteği gibi kontrol değişkenlerinin optimal ayarlarına ulaşması için fizik-tabanlı yeni bir meta-sezgisel algoritma olan Equilibrium Optimizer (EO) önerilmiştir. Tanıtılan algoritma, çeşitli hedefler kullanılarak IEEE 30-baralı test sistemi üzerinde değerlendirilmiştir ve etkinliğini tespit edebilmek için uygulanan yöntemin literatürde açıklanan diğer optimizasyon teknikleri ile karşılaştırılması yapılmıştır. Simülasyon sonuçları ve istatistiksel göstergeler, EO algoritmasının ORPD problemini çözme açısından etkinliğini ve sağlamlığını doğrulamaktadır.

Keywords

• Equilibrium optimizasyon algoritması
• meta-sezgisel
• optimal reaktif güç dağıtımı
• optimizasyon algoritmaları

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