Reliability assessment of a multi-state distribution system with microgrids based on an accelerated Monte-Carlo method

Reliability assessment of a multi-state distribution system with microgrids based on an accelerated Monte-Carlo method

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For the reliability assessment of a distribution system with microgrids (MGs), considerable computation time has to be cost to ensure convergence of an applied Monte-Carlo method (MCM) to estimating indices of interest, in the context of adopting multi-state models of constituent components. Towards achieving an efficient and accurate reliability assessment as much as possible, multi-state models of distributed generation resources, especially the battery energy storage system, are proposed. Based on the proposed models, effect analysis of a given sampled MG state is conducted in a proposed analytical manner. Moreover, an accelerated MCM nesting the proposed effect analysis methodology is also presented, dedicated to reliability evaluation of a resulting multi-state distribution system from the multi-state constituent components. Case studies on a modified IEEE-RBTS Bus6 F4 system demonstrate the effectiveness of the proposed method, against the plain MCM. In addition, impact of an important parameter, termed total state number of state-of-charge, on the convergence and speed of the proposed method has been fully analysed.


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