Shielded Controller Units for RL with Operational Constraints Applied to Remote Microgrids

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Main Authors: Nekoei, Hadi, Massé, Alexandre Blondin, Hassani, Rachid, Chandar, Sarath, Mai, Vincent
Format: Preprint
Published: 2025
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author Nekoei, Hadi
Massé, Alexandre Blondin
Hassani, Rachid
Chandar, Sarath
Mai, Vincent
author_facet Nekoei, Hadi
Massé, Alexandre Blondin
Hassani, Rachid
Chandar, Sarath
Mai, Vincent
contents Reinforcement learning (RL) is a powerful framework for optimizing decision-making in complex systems under uncertainty, an essential challenge in real-world settings, particularly in the context of the energy transition. A representative example is remote microgrids that supply power to communities disconnected from the main grid. Enabling the energy transition in such systems requires coordinated control of renewable sources like wind turbines, alongside fuel generators and batteries, to meet demand while minimizing fuel consumption and battery degradation under exogenous and intermittent load and wind conditions. These systems must often conform to extensive regulations and complex operational constraints. To ensure that RL agents respect these constraints, it is crucial to provide interpretable guarantees. In this paper, we introduce Shielded Controller Units (SCUs), a systematic and interpretable approach that leverages prior knowledge of system dynamics to ensure constraint satisfaction. Our shield synthesis methodology, designed for real-world deployment, decomposes the environment into a hierarchical structure where each SCU explicitly manages a subset of constraints. We demonstrate the effectiveness of SCUs on a remote microgrid optimization task with strict operational requirements. The RL agent, equipped with SCUs, achieves a 24% reduction in fuel consumption without increasing battery degradation, outperforming other baselines while satisfying all constraints. We hope SCUs contribute to the safe application of RL to the many decision-making challenges linked to the energy transition.
format Preprint
id arxiv_https___arxiv_org_abs_2512_01046
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Shielded Controller Units for RL with Operational Constraints Applied to Remote Microgrids
Nekoei, Hadi
Massé, Alexandre Blondin
Hassani, Rachid
Chandar, Sarath
Mai, Vincent
Artificial Intelligence
Machine Learning
Reinforcement learning (RL) is a powerful framework for optimizing decision-making in complex systems under uncertainty, an essential challenge in real-world settings, particularly in the context of the energy transition. A representative example is remote microgrids that supply power to communities disconnected from the main grid. Enabling the energy transition in such systems requires coordinated control of renewable sources like wind turbines, alongside fuel generators and batteries, to meet demand while minimizing fuel consumption and battery degradation under exogenous and intermittent load and wind conditions. These systems must often conform to extensive regulations and complex operational constraints. To ensure that RL agents respect these constraints, it is crucial to provide interpretable guarantees. In this paper, we introduce Shielded Controller Units (SCUs), a systematic and interpretable approach that leverages prior knowledge of system dynamics to ensure constraint satisfaction. Our shield synthesis methodology, designed for real-world deployment, decomposes the environment into a hierarchical structure where each SCU explicitly manages a subset of constraints. We demonstrate the effectiveness of SCUs on a remote microgrid optimization task with strict operational requirements. The RL agent, equipped with SCUs, achieves a 24% reduction in fuel consumption without increasing battery degradation, outperforming other baselines while satisfying all constraints. We hope SCUs contribute to the safe application of RL to the many decision-making challenges linked to the energy transition.
title Shielded Controller Units for RL with Operational Constraints Applied to Remote Microgrids
topic Artificial Intelligence
Machine Learning
url https://arxiv.org/abs/2512.01046