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The LSBmax algorithm for boosting resilience of electric grids post (N‐2) contingencies
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The LSBmax algorithm for boosting resilience of electric grids post (N‐2) contingencies
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Journal Article
The LSBmax algorithm for boosting resilience of electric grids post (N‐2) contingencies
2021
Overview
A computationally improved algorithm is presented to find the best transmission switching (TS) candidate for boosting resilience of electricity grids subject to (N‐2) contingencies. Here, resilience is computed as the reduction in load shed after the above‐mentioned (N‐2) contingencies. TS is a planned line outage, and past research shows that changing the transmission system's topology changes the power flow and removes post contingency violations. Finding the best TS candidate in a computationally suitable time for effectively boosting resilience is a challenge. The best TS candidate is found using a novel heuristic method by decreasing the search space based on proximity to the bus with the maximum load shedding (LSBmax). The LSBmax algorithm is faster than existing algorithms in the literature; and, it is compatible with both the AC and DC optimal power flow formulations. To validate the authors' claims of speedup and accuracy, two metrics are used to analyze the results from the IEEE 39‐bus and 118‐bus systems. Finally, the inherent parallelism of the LSBmax algorithm is leveraged on a high‐performance computing platform and applied to the large‐scale Polish 2383‐bus test system to validate scalability in both size and speedup in computation time.
Publisher
John Wiley & Sons, Inc,Institution of Engineering and Technology (IET),Wiley
