Stability Degradation Induced by Angle–Voltage Coupling in Power Systems: Bode-Type Fundamental Performance Limitation Analysis
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This paper presents a novel perspective on understanding how the interaction between phase-angle and voltage dynamics affects the stability of inverter-dominated power systems. To explore this, we analyze Bode’s integral of frequency-domain sensitivity functions, which reveals the underlying law that limits the system’s ability to reject disturbances. Our finding indicates that, although the “total” sensitivity integrals remain conservative in angle-voltage coupled systems, the coupling reshapes their distribution between phase-angle and voltage dynamics, potentially worsening system stability. This finding is generalized into fundamental laws namedsensitivity conservation and its breakingin this paper. In addition to the mechanism, our work also suggests that the stability could be improved by appropriately redistributing sensitivity across different frequency bands, diverse devices, or between phase-angle and voltage dynamics. However, this redistribution must be conducted carefully, as the sensitivity breaking law indicates that improving the performance of one aspect may lead to instability of another. This law cannot be bypassed directly by any controllers with a generic feedback structure, underscoring the fundamental limit of angle-voltage coupling dynamics and fostering a broader understanding of its nature. The proposed mechanism provides a core principle for control design in angle-voltage coupled power systems.
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Le contrôle bibliographique ouvert
DOI retrouvé dans Crossref DOI retrouvé ; titre concordant.
- Titre Crossref
- Stability Degradation Induced by Angle–Voltage Coupling in Power Systems: Bode-Type Fundamental Performance Limitation Analysis
- Date Crossref
- 01/01/2026
- Éditeur
- Institute of Electrical and Electronics Engineers (IEEE)
- Type
- journal-article
Ce recoupement confirme des métadonnées liées au DOI. Il ne confirme ni la méthode ni les conclusions de l’étude, et il ne compte pas comme une seconde source scientifique indépendante.
Où se fait cette recherche
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Tsinghua University Department of Electrical Engineering pays non établi dans la noticeUniversité ou école supérieure
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Guangdong Power Grid Company (China) pays non établi dans la noticeEntreprise
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China Southern Power Grid (China) pays non établi dans la noticeEntreprise
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Xi'an Polytechnic University pays non établi dans la noticeUniversité ou école supérieure
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Shanghai Jiao Tong University Department of Automation pays non établi dans la noticeUniversité ou école supérieure
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Guangdong Power Grid Company Ltd. Power Dispatching Control Center pays non établi dans la noticeEntreprise
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School of Electronics and Information pays non établi dans la noticeUniversité ou école supérieure
Department of Electrical Engineering — Tsinghua University, Guangdong Power Grid Company (China) et China Southern Power Grid (China), avec 4 autres affiliations.
Une affiliation ne permet pas de déduire la nationalité d’un auteur.