AC Distribution Grid Reconfiguration using Flexible DC Link Architecture for Increasing Power Delivery Capacity during (n-1) Contingency
Aditya Shekhar (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Epameinondas Kontos (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Laura Ramírez-Elizondo (TU Delft - Electrical Engineering, Mathematics and Computer Science)
Pavol Bauer (TU Delft - Electrical Engineering, Mathematics and Computer Science)
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Abstract
A practical issue faced by today's ac grid is the rapidly growing power demand on its aging infrastructure. One possibility to maximize the capacity of the existing infrastructure is to refurbish the ac links to operate under dc conditions using modular multilevel converters. In this paper, the idea is applied to restructure an actual medium voltage distribution system. Further, a systematic reconfiguration strategy is proposed to maintain high power delivery capacity even during (n-1) contingency. Contingency analysis is carried out for faults in different system components of the distribution grid. Towards this goal, novel concepts such as reconfigurable switch, dc link converter bypass and flexible dc to ac operational transition are proposed.