A General Approach of Automated Environment Design for Learning the Optimal Power Flow
This addresses the challenge of optimizing environment design for reinforcement learning in power systems, offering a general method that could improve training efficiency, though it appears incremental as it builds on existing hyperparameter optimization frameworks.
The paper tackles the problem of designing reinforcement learning environments for optimal power flow by proposing an automated approach using multi-objective optimization, which consistently outperforms manual baselines on five benchmarks and provides novel insights into key design decisions.
Reinforcement learning (RL) algorithms are increasingly used to solve the optimal power flow (OPF) problem. Yet, the question of how to design RL environments to maximize training performance remains unanswered, both for the OPF and the general case. We propose a general approach for automated RL environment design by utilizing multi-objective optimization. For that, we use the hyperparameter optimization (HPO) framework, which allows the reuse of existing HPO algorithms and methods. On five OPF benchmark problems, we demonstrate that our automated design approach consistently outperforms a manually created baseline environment design. Further, we use statistical analyses to determine which environment design decisions are especially important for performance, resulting in multiple novel insights on how RL-OPF environments should be designed. Finally, we discuss the risk of overfitting the environment to the utilized RL algorithm. To the best of our knowledge, this is the first general approach for automated RL environment design.