Contribution of Microgrids to distribution network reliability

The current development of distribution networks into active and smarter systems has been facilitated by the integration of novel technologies such as Microgrids (MGs) and Distributed Energy Resources. These new concepts are expected to bring about significant economic benefits at the distribution level in the form of network reinforcement deferral and increased reliability levels, among others. In this context, this paper aims at shedding light on the impacts that the use of MGs for post-contingency distribution network management can have on reliability. For this purpose, a reliability assessment tool based on sequential Monte Carlo Simulations (MCS) is presented and used for the evaluation of a real distribution network, while a framework to implement the MG services is also proposed. The results show that reliability improvements for MG users can be remarkable, while external network users and the network operator also perceive benefits. The former experience higher reliability levels, and the latter experience lower network reinforcement needs when connecting additional customers due to the services provided by MGs.