Abstract

High penetration of renewable energy sources has intensified voltage fluctuations and violations in modern distribution networks. Although distributed control offers a scalable solution, existing methodologies frequently require the exchange of sensitive operational data. This critical limitation, which is intrinsic to distributed algorithms, raises significant privacy concerns. This paper proposes a novel privacy-preserving distributed voltage regulation scheme based on the framework of state-based potential games. Specifically, we first formulate a potential function that aligns the local objectives of individual buses with the voltage profile improvement goal. To reduce the risk of sensitive-data disclosure, we introduce a decoupling mechanism where buses only exchange information regarding coupling constraint violations rather than bus voltage or power injection data. Furthermore, a parallel update law is established, allowing buses to optimize their strategies independently. A key strength of the proposed scheme is its resilience to stochastic communication outages (SCOs). Numerical tests demonstrate that, in comparison to existing distributed voltage control methods, the proposed scheme not only reduces the risk of sensitive-data disclosure but also maintains highly consistent performance across diverse SCO scenarios. Finally, the effectiveness and convergence performance of the proposed voltage regulation scheme are validated by the case studies.

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