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Optimal power management of shipboard power system for failure mode (OPMSF)is a significant and challenging problem considering the safety of system andperson. Many existing works focused on the transient-time recovery withoutconsideration of the operating cost and the voyage plan. In this paper, theOPMSF problem is formulated considering the mid-time scheduling and the faultsat bus and generator. Two- side adjustment methods including the load sheddingand the reconfiguration are coordinated for reducing the fault effects. Toaddress the formulated non-convex problem, the travel equality constraint andfractional energy efficiency operation indicator (EEOI) limitation aretransformed into the convex forms. Then, considering the infeasibility scenarioaffected by faults, a further relaxation is adopted to formulate a new problemwith feasibility guaranteed. Furthermore, a sufficient condition is derived toensure that the new problem has the same optimal solution as the original one.Because of the mixed-integer nonlinear feature, an optimal algorithm based onBenders decomposition (BD) is developed to solve the new one. Due to the slowconvergence caused by the time-coupled constraints, a low-complexitynear-optimal algorithm based on BD (LNBD) is proposed. The results verify theeffectivity of the proposed methods and algorithms.

Optimal Power Management for Failure Mode of MVDC Microgrids in All-Electric Ships