Adequacy Assessment of Grid-Connected Nanogrid

Microgrid, an autonomous power distribution system that utilizes distributed generation, offers advantages by means of increasing of reliability, efficiency, etc. Currently, the microgrid implementation extends to a smaller scale called nanogrid. Increasing number of microgrids and nanogrids raises the need for a measurement tool that can be used to assess the performance level of a microgrid system so that it can be used to compare one system with another, to measure the ups and downs of a system’s performance over a time period, and to use the evaluation result as the base of further improvement. This paper offers a method for evaluating the reliability of a nanogrid system using a Markov model. The reliability indicator selected in this study is the loss of energy expectation (LOLE), which is considered to be more suitable for this purpose. As the validation of this model, the reliability evaluation of a nanogrid in the energy management laboratory, Institut Teknologi Bandung (ITB) is reported.