Abstract
An AC-integrated capacitor bank unit (AC-CBU) rack architecture places a current transformer (CT) at an upstream location, such as a low-voltage switchgear, relative to both the AC-CBU racks and the payload racks. The upstream CT measures the aggregate load current for a group of racks. Multiple AC-CBU racks share this measurement data from the single CT and use feedback control to smooth power fluctuations on the power busway. This configuration results in a flexible layout compatible with standard data center designs, as the AC-CBU racks can be physically distributed among payload racks and connected in a daisy-chain to share the CT signal. Distributing multiple AC-CBU racks across a pod achieves superpod-level redundancy and improves system reliability without requiring module-level co-design or maintenance.
Keywords: alternating current capacitor bank unit (AC-CBU) rack, AC-CBU rack, current transformer (CT), feedback control, layout flexibility, superpod-level redundancy, data center operation, module-level maintenance
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
N/A, "Flexible Placement AC-CBU Rack with Upstream Current Transformer and Feedback Control", Technical Disclosure Commons, (September 02, 2026)
https://www.tdcommons.org/dpubs_series/11569