The Unseen AI Disruptions for Power Grids: LLM-Induced Transients
It addresses a largely overlooked problem of AI-induced power grid disruptions, which is critical for ensuring reliable and sustainable AI infrastructure development, though it is incremental in highlighting an emerging interdisciplinary issue.
This paper examines the disruptive dynamic power consumption behavior of AI infrastructure, such as LLMs, which features fast transients and high peak-idle ratios, posing threats to power grid reliability and resilience. It analyzes AI transient behavior, develops mathematical models, and discusses challenges and opportunities for existing power grids.
Recent breakthroughs of large language models (LLMs) have exhibited superior capability across major industries and stimulated multi-hundred-billion-dollar investment in AI-centric data centers in the next 3-5 years. This, in turn, bring the increasing concerns on sustainability and AI-related energy usage. However, there is a largely overlooked issue as challenging and critical as AI model and infrastructure efficiency: the disruptive dynamic power consumption behaviour. With fast, transient dynamics, AI infrastructure features ultra-low inertia, sharp power surge and dip, and a significant peak-idle power ratio. The power scale covers from several hundred watts to megawatts, even to gigawatts. These never-seen-before characteristics make AI a very unique load and pose threats to the power grid reliability and resilience. To reveal this hidden problem, this paper examines the scale of AI power consumption, analyzes AI transient behaviour in various scenarios, develops high-level mathematical models to depict AI workload behaviour and discusses the multifaceted challenges and opportunities they potentially bring to existing power grids. Observing the rapidly evolving machine learning (ML) and AI technologies, this work emphasizes the critical need for interdisciplinary approaches to ensure reliable and sustainable AI infrastructure development, and provides a starting point for researchers and practitioners to tackle such challenges.