Uninterrupted power supply to BESS based microgrid system using adaptive reclosing approach

As more than 80% of faults on overhead lines are temporary (transient) in nature which is caused due to lightning strikes, momentary bird or tree limb contact, wind bringing conductors in contact, etc. These type of faults gets cleared by itself in a short duration. But the use of a conventional reclosing scheme results in an outage time which is much larger than the actual fault duration. This is due to the use of fixed dead times in conventional reclosing schemes. This unnecessary outage results in increased consumption of stored energy of energy storage system causing considerable losses. This paper proposes an empirical mode decomposition based adaptive reclosing technique which can sense the exact instant of fault clearance and modify the prefixed dead time to an adaptive value. Within half cycle time period after fault clearance reclosing command can be issued for the breaker. The performance of the proposed algorithm is verified in a modified IEEE 13 bus distribution network model considering a battery energy storage system and hybrid distributed generators. The simulation and modelling of the various fault cases in the microgrid structure are done using EMTDC/PSCAD software.