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Erschienen in:
24.05.2023 | Original Paper
Critical loads restoration of distribution networks after blackout by microgrids to improve network resiliency
Erschienen in: Electrical Engineering | Ausgabe 5/2023
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Abstract
After extreme natural disasters like storms, earthquakes, and floods, the connection of the distribution network with the main grid may lose. In this condition, the power of the main grid is unavailable, and the survived microgrids (MGs) are the only power sources. Since the outputs of MGs are limited, re-energizing of all out-of-service loads is impossible, and restoring critical loads (CLs) becomes the priority of the network operators. We propose a new multistage restoration strategy to improve the network’s resiliency by critical loads restoration after fault occurrence and blackout. The considered objective functions include weighted restored energy and switching operations. The presented strategy offers the best restoration plan for each hour of outage duration with the help of the VIKOR method. The presented method is tested on an IEEE 123-bus distribution network. The simulation results confirm that the proposed multistage restoration strategy reaches better restoration plans compared to conventional methods.
