{"paper_id":"19c702c5-a28e-4b49-9cb6-905e44ba1cd5","body_text":"Resilient Fixed-Order Damping Controller for Low-Frequency Inter-Area Oscillations in Power Systems under Communication Failures | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Article Resilient Fixed-Order Damping Controller for Low-Frequency Inter-Area Oscillations in Power Systems under Communication Failures Mithu Sarkar, Krishna Kumba, Anik Goswami, Saurav Gupta, Pritam Bhattacharjee, and 1 more This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-8600444/v1 This work is licensed under a CC BY 4.0 License Status: Under Review Version 1 posted 28 You are reading this latest preprint version Abstract Low-frequency oscillations (LFOs) pose a critical challenge to small-signal stability, affecting the reliable operation of interconnected power systems. These oscillations can reduce tie-line power transfer capability and compromise overall system stability. Inter-area modes can be effectively observed from multiple locations and controlled from a single point, motivating the use of a wide-area damping controller (WADC). This paper proposes a robust, fixed low-order Two Input Single Output (TISO) controller that enhances system resilience by utilizing the two most observable wide-area signals corresponding to critical inter-area modes. Communication failures and time delays are major threats to controller performance; the latter is modeled using the Pade approximation. The controller is designed by optimizing key parameters, including the H ∞ norm, spectral abscissa, and complex stability radius. Kundur’s 11-bus system and the IEEE-39 bus test system are employed to validate the approach. Simulation results demonstrate that the proposed controller significantly improves damping of inter-area oscillations under normal conditions and maintains robust performance under communication failures and feedback delays. Physical sciences/Engineering Physical sciences/Mathematics and computing Inter-area oscillation communication failure Time delay Fixed order control Full Text Additional Declarations No competing interests reported. Cite Share Download PDF Status: Under Review Version 1 posted Editorial decision: Revision requested 06 Apr, 2026 Reviews received at journal 10 Mar, 2026 Reviews received at journal 09 Mar, 2026 Reviews received at journal 07 Mar, 2026 Reviews received at journal 07 Mar, 2026 Reviews received at journal 05 Mar, 2026 Reviews received at journal 05 Mar, 2026 Reviews received at journal 04 Mar, 2026 Reviews received at journal 03 Mar, 2026 Reviews received at journal 02 Mar, 2026 Reviews received at journal 28 Feb, 2026 Reviewers agreed at journal 28 Feb, 2026 Reviewers agreed at journal 28 Feb, 2026 Reviewers agreed at journal 27 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviews received at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers agreed at journal 26 Feb, 2026 Reviewers invited by journal 26 Feb, 2026 Editor assigned by journal 30 Jan, 2026 Editor invited by journal 30 Jan, 2026 Submission checks completed at journal 27 Jan, 2026 First submitted to journal 27 Jan, 2026 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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