Power Supply Shedding for Datacenter Efficiency
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Solution Overview
Problem
Datacenter power systems face efficiency losses due to the varying output loads on power supply units (PSUs), which operate efficiently only within specific load ranges and incur losses at high or low loads, necessitating active management to maintain high efficiency.
Innovation Solution
The system actively manages PSUs by shedding and reactivating units based on load conditions, using a power shelf controller to monitor and predict output loads, deactivating units when loads drop below thresholds and reactivating them when loads increase, to maintain PSUs within their high-efficiency range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple PSUs are operated in parallel to handle varying output loads, then the system can accommodate a range of power demands, but the PSUs operate inefficiently when loads are outside the high-efficiency band
Solution Approach 1:
The system dynamically adjusts the number of active PSUs based on real-time load conditions. When total output load decreases below a threshold indicating PSUs are operating outside their high-efficiency band, the controller deactivates one or more PSUs. When load increases above the threshold, PSUs are reactivated. This dynamic adjustment ensures PSUs operate within their optimal efficiency range while still accommodating varying power demands.
Solution Approach 2:
The system changes the operational parameters of the power supply system by adjusting the number of active PSUs based on load thresholds. The controller monitors total output load and compares it against predetermined thresholds to determine when to activate or deactivate PSUs, thereby optimizing the operational parameters of the power supply configuration to maintain high efficiency.
2Loss of energy
If PSUs are deactivated to improve efficiency, then energy wastage is reduced, but the system's ability to handle sudden load increases is compromised
Solution Approach 1:
The controller continuously monitors the total output load and uses this feedback to make real-time decisions about PSU activation and deactivation. When the monitored load falls below the efficiency threshold, the controller deactivates PSUs to reduce energy wastage. When load exceeds the threshold, the controller reactivates PSUs to ensure adequate power supply capacity. This closed-loop feedback mechanism balances efficiency optimization with system reliability.
Solution Approach 2:
The system preemptively deactivates PSUs when load conditions indicate they will operate inefficiently, rather than waiting for efficiency to degrade. By monitoring load thresholds and taking preliminary action to adjust PSU configuration, the system prevents energy wastage before it occurs while maintaining the capability to quickly reactivate PSUs if load conditions change.
Data Source
AI summary
Systems and methods for managing a collection of power supply units (PSUs), such as those used in a datacenter environment, can include detecting changes in an output load on the PSUs to less than a target output load that is based on a target efficiency of the PSUs. In response to the indication that the output load is decreasing, PSUs can be selectively deactivated so that that an average output load of remaining, active PSUs of the collection of PSUs remains above the target output load corresponding to the target efficiency of the PSUs.