Harnessing Flexible Spatial and Temporal Data Center Workloads for Grid Regulation Services
This work addresses the challenge of making data centers reliable flexible loads for grid regulation, which is important for grid operators and data center managers, though it appears incremental as it builds on existing methods by integrating them more tightly.
The paper tackles the problem of data centers failing to sustain real-time grid frequency regulation due to separate optimization of workload scheduling and regulation capacity bidding, by proposing a unified day-ahead co-optimization framework that jointly decides workload distribution and regulation commitments, resulting in lower system operating costs, more viable regulation capacity, and better revenue-risk trade-offs in case studies.
Data centers (DCs) are increasingly recognized as flexible loads that can support grid frequency regulation. Yet, most existing methods treat workload scheduling and regulation capacity bidding separately, overlooking how queueing dynamics and spatial-temporal dispatch decisions affect the ability to sustain real-time regulation. As a result, the committed regulation may become infeasible or short-lived. To address this issue, we propose a unified day-ahead co-optimization framework that jointly decides workload distribution across geographically distributed DCs and regulation capacity commitments. We construct a space-time network model to capture workload migration costs, latency requirements, and heterogeneous resource limits. To ensure that the committed regulation remains deliverable, we introduce chance constraints on instantaneous power flexibility based on interactive load forecasts, and apply Value-at-Risk queue-state constraints to maintain sustainable response under cumulative regulation signals. Case studies on a modified IEEE 68-bus system using real data center traces show that the proposed framework lowers system operating costs, enables more viable regulation capacity, and achieves better revenue-risk trade-offs compared to strategies that optimize scheduling and regulation independently.