Researchers have developed a system called TwinGridShield to prevent large language models from making unauthorized changes to power grids. The system uses a 'twin' model of the grid to check proposed actions for safety before they are implemented. In tests, the system successfully blocked all unauthorized changes when faced with a high probability of unsafe proposals. However, the system's performance degraded under certain conditions, such as measurement errors or mismatched branch ratings. --- Why it matters: This matters because large language models can be used to control critical infrastructure like power grids, and ensuring their safety is crucial. TwinGridShield provides a way to prevent unauthorized changes and improve grid security. Source: https://arxiv.org/abs/2608.15391