N-k Verification of a High Voltage Grid

N-k Verification of a High Voltage Grid | Authorea try { document.documentElement.classList.add('js'); } catch (e) { } var _gaq = _gaq || []; _gaq.push(['_setAccount', 'G-8VDV14Y67G']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s); })(); Skip to main content Preprints Collections Wiley Open Research IET Open Research Ecological Society of Japan All Collections About About Authorea FAQs Contact Us Quick Search anywhere Search for preprint articles, keywords, etc. Search Search ADVANCED SEARCH SCROLL This is a preprint and has not been peer reviewed. Data may be preliminary. 7 January 2026 V1 Latest version Share on N-k Verification of a High Voltage Grid Authors : Pascal Bächler 0009-0002-3851-5213 [email protected] , Gustavo Valverde , Klaudia Madeira Bein , Britta Heimbach , and Andri Casura Authors Info & Affiliations https://doi.org/10.22541/au.176774769.94251960/v1 159 views 78 downloads Contents Abstract Supplementary Material Information & Authors Metrics & Citations View Options References Figures Tables Media Share Abstract Operational challenges arise in urban high-voltage grids when maintenance and construction require the disconnection of multiple lines while ensuring high grid reliability. For this purpose, ewz, the distribution system operator of the city of Zurich, developed an optimization tool to evaluate the operational reliability of their planned 150 kV target grid. The tool employs a security-constrained DC optimal power flow model to analyze numerous line disconnection scenarios efficiently, identifying critical cases where line capacities are exceeded under the n-1 criterion. It supports the evaluation of strategies to mitigate critical cases, including leveraging grid flexibilities to reduce load, redistributing loads between substations, and reinforcing the grid. Results show that critical cases occur in less than 1% of the scenarios, and the proposed mitigation strategies can significantly reduce this number. The tool enhances planning and grid operation by identifying critical lines, facilitating simultaneous line disconnection scheduling, and proposing measures to improve reliability. This approach ensures that Zurich’s target grid meets the highest operational requirements, providing a robust framework for maintaining flexibility and reliability in the face of urban grid challenges. The tool’s ability to solve power flow cases within reasonable timeframes makes it an asset for grid operators. Supplementary Material File (20251203_paper_reliability_verification_of_a_high_voltage_target_grid_for_urban_operation.docx) Download 250.87 KB Information & Authors Information Version history V1 Version 1 07 January 2026 Copyright This work is licensed under a Non Exclusive No Reuse License. Keywords distribution networks optimisation power distribution lines power distribution planning power distribution reliability power system reliability power system security Authors Affiliations Pascal Bächler 0009-0002-3851-5213 [email protected] Elektrizitätswerk der Stadt Zürich View all articles by this author Gustavo Valverde ETH Zürich View all articles by this author Klaudia Madeira Bein Elektrizitätswerk der Stadt Zürich View all articles by this author Britta Heimbach Elektrizitätswerk der Stadt Zürich View all articles by this author Andri Casura Elektrizitätswerk der Stadt Zürich View all articles by this author Metrics & Citations Metrics Article Usage 159 views 78 downloads .FvxKWukQNSOunydq8rnd { width: 100px; } Citations Download citation Pascal Bächler, Gustavo Valverde, Klaudia Madeira Bein, et al. N-k Verification of a High Voltage Grid. Authorea . 07 January 2026. 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