Recently, distributed generation using renewable energy sources has increased in power systems to solve environmental problems and resource exhaustion problems. However, conventional reliability evaluation methods of power systems cannot easily evaluate power systems with massive penetration of distributed generations because of the loop switching operation. This paper proposes the reliability evaluation method with reference to the concept of reliability controls. This method controls power system states by the loop switching operation and evaluates power system reliability of controlled state. Therefore, proposed method can evaluate power system while considering the effect of loop switching operation. Moreover, this system helps the decision of power system operators because it quantitatively selects the best operation from the reliability evaluation result.
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