Optimal Operational Scheduling of Reconfigurable Microgrids in Presence of Renewable Energy Sources

Abstract

Passive distribution networks are being converted into active ones by incorporating distributed means of energy generation, consumption, and storage, and the formation of so-called microgrids (MGs). As the next generation of MGs, reconfigurable microgrids (RMGs) are still in early phase studies, and require further research. RMGs facilitate the integration of distributed generators (DGs) into distribution systems and enable a reconfigurable network topology by the help of remote-controlled switches (RCSs). This paper proposes a day-ahead operational scheduling framework for RMGs by simultaneously making an optimal reconfiguration plan and dispatching controllable distributed generation units (DGUs) considering power loss minimization as an objective. A hybrid approach combining conventional particle swarm optimization (PSO) and selective PSO (SPSO) methods (PSO&SPSO) is suggested for solving this combinatorial, non-linear, and NP-hard complex optimization problem. PSO-based methods are primarily considered here for our optimization problem, since they are efficient for power system optimization problems, easy to code, have a faster convergence rate, and have a substructure that is suitable for parallel calculation rather than other optimization methods. In order to evaluate the suggested method’s performance, it is applied to an IEEE 33-bus radial distribution system that is considered as an RMG. One-hour resolution of the simultaneous network reconfiguration (NR) and the optimal dispatch (OD) of distributed DGs are carried out prior to this main study in order to validate the effectiveness and superiority of the proposed approach by comparing relevant recent studies in the literature.

A Novel Combined Evolutionary Algorithm for Optimal Planning of Distributed Generators in Radial Distribution Systems

“…1 Ackley, 2 Griewank, 3 Rastrigin, 4 Levy, 5 Perm 0, d, β, 6 sum squares, 7 rotated hyper-ellipsoid, 8 power sum, 9 Rosenbrock, 10 Dixon-Price.…”

“…Converting the nature of RDSs from passive to active by installing small distributed generators (DG) near to end consumers is one of the solutions to overcome those technical problems. DG units improve the voltages along the feeder; enhance the reliability, as well as the quality; increase the voltage stability; allow more power to be transmitted through the feeders which defers the investments on future expansion of transmission and distribution systems; and reduce the total system's losses along with their costs [2,3].…”

Utilization of Active Distribution Network Elements for Optimization of a Distribution Network Operation

“…When appropriately utilized, the time-variant network reconfiguration can facilitate higher cost-effectiveness, efficiency, reliability, and power quality. However, some challenges remain in terms of network protection and stability [50,51].…”

Yenilenebilir Enerji Kaynaklarına Dayalı Bir Sistemde Güç Kalitesi Analizi, Kontrolü ve İzlemesi

“…Akıllı şebekeler geleneksel güç sistemi ile karşılaştırıldığında, çeşitli enerji girişleri, çoklu yük özellikleri ve çeşitli enerji dönüşüm teknolojilerini birleştiren mikro şebeke veya dağıtılmış enerji santrali, kimyasal enerji, termodinamik ve elektrodinamiklerin birbirine bağlanması ile doğrusal olmayan ve karmaşık bir sistem olduğu bilinmektedir. Mikro şebekeler, dağıtılmış enerji üretim sistemleri entegrasyonu ve güç kalitesini güvence altına alma gibi kritik yüklere enerji güvencesi sağlama gereksinimi nedeniyle dikkat çekmektedir [21][22][23]. [18,24], aktif güç filtresi (AGF) [25,26] ve hibrid aktif güç filtresi (HAGF) [27,28] tekniklerini içermektedir.…”