AutoB2G: A Large Language Model-Driven Agentic Framework For Automated Building-Grid Co-Simulation

TL;DR

AutoB2G is an innovative framework that uses large language models to automate building-grid co-simulation workflows from natural language, enhancing simulation efficiency and grid performance evaluation.

Contribution

It introduces a novel LLM-driven approach for fully automating building-grid co-simulation workflows based on natural language instructions.

Findings

AutoB2G successfully automates simulator implementation.

The framework improves grid-side performance metrics.

It extends CityLearn V2 to support B2G interactions.

Abstract

The growing availability of building operational data motivates the use of reinforcement learning (RL), which can learn control policies directly from data and cope with the complexity and uncertainty of large-scale building clusters. However, most existing simulation environments prioritize building-side performance metrics and lack systematic evaluation of grid-level impacts, while their experimental workflows still rely heavily on manual configuration and substantial programming expertise. Therefore, this paper proposes AutoB2G, an automated building-grid co-simulation framework that completes the entire simulation workflow solely based on natural-language task descriptions. The framework extends CityLearn V2 to support Building-to-Grid (B2G) interaction and adopts the large language model (LLM)-based SOCIA (Simulation Orchestration for Computational Intelligence with Agents) framework to automatically generate, execute, and iteratively refine the simulator. As LLMs lack prior knowledge of the implementation context of simulation functions, a codebase covering simulation configurations and functional modules is constructed and organized as a directed acyclic graph (DAG) to explicitly represent module dependencies and execution order, guiding the LLM to retrieve a complete executable path. Experimental results demonstrate that AutoB2G can effectively enable automated simulator implementations, coordinating B2G interactions to improve grid-side performance metrics.