Dynamic Branch Circuit Power Capping for Data Center Utilization
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Solution Overview
Problem
Current data center power management systems oversize branch circuits based on peak power ratings, leading to underutilization of power capacity and unnecessary capital investments, as IT equipment typically consumes less power than rated.
Innovation Solution
A dynamic power capping system that measures real-time current consumption on branch circuits and adjusts power caps for each powered element to ensure average usage is at most 80% of the branch circuit capacity, using a Power and Current Measurement System (PCMS) to update power caps through operating system management or power line communications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manufacturers rate equipment for worst case conditions and maximum configuration, then reliability is improved, but capital investment increases due to oversized power infrastructure
Solution Approach 1:
The patent implements dynamic power capping that adjusts power limits in real-time based on actual workload and thermal conditions. Instead of static worst-case power caps, the system continuously monitors processor temperature, workload intensity, and power consumption, then dynamically adjusts power caps to match actual needs while maintaining reliability thresholds. This resolves the contradiction by making power infrastructure capacity utilization dynamic rather than statically oversized.
Solution Approach 2:
The system changes power cap parameters dynamically based on operating conditions. Power caps are adjusted as parameters such as temperature, workload type, and duration change. This allows the system to maintain reliability under worst-case conditions when needed while reducing power consumption during normal operation, thereby avoiding the need for permanently oversized power infrastructure.
2Reliability
If power caps are set based on manufacturer ratings, then safety is improved, but resource utilization deteriorates due to underutilization of power capacity
Solution Approach 1:
The patent implements a feedback mechanism that continuously monitors actual power consumption, temperature, and workload conditions. Based on this feedback, the system adjusts power caps in real-time. When conditions are safe and within thermal margins, power caps are increased to improve utilization. When approaching safety thresholds, caps are reduced to maintain reliability. This closed-loop feedback system resolves the contradiction by making power safety adaptive rather than statically conservative.
Solution Approach 2:
The system transitions from static power caps to dynamic power caps that adapt to real-time conditions. Power caps are not fixed but change continuously based on monitored parameters, allowing the system to safely utilize more power capacity when conditions permit while maintaining safety boundaries. This dynamic approach simultaneously improves both safety and resource utilization.
3Reliability
If branch circuits are sized for peak power ratings, then reliability is improved, but capital investment increases due to oversized electrical wiring and infrastructure
Solution Approach 1:
The patent applies dynamic power capping at the branch circuit level, allowing the system to safely utilize higher power capacity when actual demand and thermal conditions warrant it, rather than requiring infrastructure sized for absolute peak ratings. This dynamic utilization reduces the need for oversized electrical infrastructure while maintaining reliability through active power management.
Solution Approach 2:
The system enables a single branch circuit to serve multiple functions and power levels dynamically. Instead of requiring dedicated infrastructure for peak power, the same branch circuit adapts its effective capacity based on real-time conditions, allowing one infrastructure to universally handle varying power demands safely, thereby reducing total material requirements.
Data Source
AI summary
A mechanism is provided for dynamically changing power caps for a set of powered elements. Current being consumed by the set of powered elements P on a branch circuit is measured and available current on the branch circuit is determined. A new total power cap for a current time period t is identified based on a current total power cap and the measured current. A difference in total power caps (ΔTPC) is determined and, for each powered element p in the set of powered elements P at the current time period, a new power cap PC (p,t) is determined based on the previous power cap PC(p,t−1) and the difference of the total power caps to the set of powered elements P. A power cap of each powered element p is then dynamically set to the new power cap PC (p,t).