Vokony, István (2026) System Rigidity: A Comprehensive Approach to Enhancing Power System Stability. RENEWABLE ENERGY ENVIRONMENT AND POWER QUALITY JOURNAL, 26. pp. 521-526. ISSN 3020-531X
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Abstract
The shift toward renewable-dominated power systems has significantly reduced inertia, challenging traditional stability metrics. This paper introduces system rigidity as a unified measure capturing frequency, voltage, and angle stability in lowinertia grids. A Rigidity Response Threshold (RRT) is defined as the maximum disturbance a system can endure without instability, derived using a Lyapunov-based framework. Validation through field tests on the Fót microgrid – including pump motor switching and PV disconnection – confirms that system rigidity aligns with known stability boundaries and outperforms inertia- or RoCoFbased indicators in sensitivity. The proposed rigidity metric and RRT offer operators a holistic tool to assess and enhance stability, supporting the deployment of synthetic inertia, fast frequency response, and advanced control strategies for future resilient power systems.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | frequency stability, low-inertia systems, renewable energy integration, synthetic inertia, system rigidity |
| Subjects: | T Technology / alkalmazott, műszaki tudományok > TK Electrical engineering. Electronics Nuclear engineering / elektrotechnika, elektronika, atomtechnika |
| Depositing User: | dr István Vokony |
| Date Deposited: | 17 Sep 2026 08:29 |
| Last Modified: | 17 Sep 2026 08:29 |
| URI: | https://real.mtak.hu/id/eprint/246491 |
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