Abstract
To facilitate the integration of variable renewable generation and improve the resilience of electricity sup-ply in a microgrid, this paper proposes an optimal scheduling strategy for microgrid operation consideringconstraints of islanding capability. A new concept, probability of successful islanding (PSI), indicatingthe probability that a microgrid maintains enough spinning reserve (both up and down) to meet localdemand and accommodate local renewable generation after instantaneously islanding from the maingrid, is developed. The PSI is formulated as mixed-integer linear program using multi-interval approx-imation taking into account the probability distributions of forecast errors of wind, PV and load. Withthe goal of minimizing the total operating cost while preserving user specified PSI, a chance-constrainedoptimization problem is formulated for the optimal scheduling of mirogrids and solved by mixed integerlinear programming (MILP). Numerical simulations on a microgrid consisting of a wind turbine, a PVpanel, a fuel cell, a micro-turbine, a diesel generator and a battery demonstrate the effectiveness of theproposed scheduling strategy. The relationship between PSI and various factors are verified.
