Heuristic methods for postoutage voltage magnitude calculations

Abstract

Power systems play a significant role in every aspect of our daily lives. Hence, their continuation without any interruption (or with the least duration of interruption due to faults or scheduled maintenances) is one of the key aims of electrical energy providers. As a result, electrical energy providers need to check in great detail the integrity of their power systems by performing regular contingency studies of the equipment involved. Among others, line and transformer outage simulations constitute an integral part of an electrical management system. Both accuracy and calculation speed depend on the branch outage model and/or the solution algorithms applied. In this paper, the local constrained optimization problem of the single-branch outage problem is solved by intelligent methods: particle swarm optimization, differential evolution, and harmony search. Simulations of IEEE 14-, 30-, 118-, and 300-bus systems are computed both by intelligent methods and by AC load flow. The results of the intelligent method-based simulations and AC load flow-based simulations are compared in terms of accuracy and computation speed.

The impact of demand response programs on UPFC placement

“…The IEEE reliability test system [39] shown in Figure 3 techniques it is more effective in solving a wide variety of optimization problems in power system studies [40,41]. The HSA has fewer mathematical requirements and does not need initial value settings of the decision variables.…”

Armoni Araması Yöntemi ile Elektrik Dağıtım Sistemlerinin Yeniden Yapılandırılması: Elektrikli Araçların Etkisi

“…Sonraki yıllarda, doğadaki kuş sürülerinin yiyecek arama davranışlarını modelleyen parçacık sürüsü eniyilemesi [23], karıncaların yemek ararken salgıladıkları feromen salgısına göre yön bulmalarını temel alan karınca sürüsü eniyilemesi [24] gibi yöntemler de ortaya konulmuştur. Çalışmada 'nin seçilme sebebi, yöntemin hızlı bir şekilde en iyi çözüme yakın çözümleri elde edebilme yeteneğidir [25].…”

“…genelde 0.7-0.9 arasında bir değer olarak belirlenir. değerinin 0.05 ile 0.3 arasında belirlenmesi sıkça gözlemlenir [19,20,25].…”