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arXiv · 2510.14834

Improved Voltage Regulation with Optimal Design of Decentralized Volt-VAr Control

Daniel Russell·Dakota Hamilton·Mads R. Almassalkhi·Hamid R. Ossareh
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Abstract

Integration of distributed energy resources has created a need for autonomous, dynamic voltage regulation. Decentralized Volt-VAr Control (VVC) of grid-connected inverters presents a unique opportunity for voltage management but, if designed poorly, can lead to unstable behavior when in feedback with the grid. We model the grid-VVC closed-loop dynamics with a linearized power flow approach, leveraging historical data, which shows improvement over the commonly used LinDistFlow model. This model is used to design VVC slopes by minimizing steady-state voltage deviation from the nominal value, subject to a non-convex spectral radius stability constraint, which has not been previously implemented within this context. We compare this constraint to existing convex restrictions and demonstrate, through simulations on a realistic feeder, that using the spectral radius results in more effective voltage regulation.

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Daniel Russell, Dakota Hamilton, Mads R. Almassalkhi, Hamid R. Ossareh. 2025-10-16. Improved Voltage Regulation with Optimal Design of Decentralized Volt-VAr Control. https://arxiv.org/abs/2510.14834

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