Active Transfer Switch Control for Datacenter Power Redundancy
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Solution Overview
Problem
Datacenters face high costs due to the infrastructure required for multiple independent power feeds, and existing backup systems can become overloaded during power failures, leading to service disruptions.
Innovation Solution
Implementing a shared secondary power feed and controlling active transfer switches to manage power distribution, allowing discrete hardware to switch back to primary power feeds even if they are non-operational, and setting power thresholds to prevent overload, while optionally changing default operations to avoid automatic transitions to the secondary power feed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single shared secondary power feed is used to reduce cost, then cost is reduced, but the secondary power feed may become overloaded during primary power feed failures
Solution Approach 1:
The system dynamically adjusts the operational state of discrete hardware by controlling active transfer switches. When the secondary power feed approaches its power threshold, the system automatically switches selected hardware back to primary power feeds or deactivates them, preventing overload while maintaining cost efficiency through shared backup infrastructure.
Solution Approach 2:
The control computing device continuously monitors the power threshold of the secondary power feed and uses this feedback to make real-time decisions about transfer switch operations. This closed-loop control ensures the secondary feed operates within safe limits while maximizing cost savings from shared backup power.
2Reliability
If active transfer switches automatically transition to shared secondary power feed during primary power feed failure, then service continuity is maintained, but the secondary power feed may be overloaded
Solution Approach 1:
The system transitions from static automatic failover to dynamic conditional failover. Transfer switches are controlled to transition to secondary power feed only when capacity is available, and to switch back or deactivate when the power threshold is approached, creating a flexible power management system that adapts to real-time conditions.
Solution Approach 2:
The system takes preliminary action by proactively switching hardware back to primary power feeds or deactivating them before the secondary power feed becomes overloaded. This preventive approach avoids the harmful effect of overload while maintaining service continuity where possible.
3Power
If discrete hardware is switched back to non-operational primary power feeds, then secondary power feed overload is prevented, but service disruption occurs
Solution Approach 1:
The system applies different actions to different discrete hardware based on local conditions. Not all hardware is switched back or deactivated - only selected hardware is subjected to these actions, while other hardware continues to receive power from the secondary feed, maintaining partial service availability while preventing overload.
Solution Approach 2:
Rather than switching all hardware back to primary feeds or deactivating all hardware, the system applies partial action by selecting only certain discrete hardware for switching or deactivation. This minimizes service disruption while still preventing secondary power feed overload.
4Reliability
If multiple independent primary power feeds are provided, then reliability is improved, but infrastructure cost increases
Solution Approach 1:
The secondary power feed is designed to serve multiple functions: it provides backup power to multiple distinct groups of devices from different primary feeds, and can dynamically accommodate failures from any single primary feed. This multi-functional shared backup system replaces the need for dedicated secondary feeds for each primary feed, reducing infrastructure cost while maintaining reliability.
Data Source
AI summary
To prevent overloading of a shared secondary power feed, active transfer switches are controlled to switch discrete hardware from the shared secondary to a corresponding primary power feed, even if such a primary is currently nonoperational thereby resulting in deactivation of such hardware. A threshold amount of power draw from the shared secondary is established, such as to ensure that failure of a single primary can be accommodated, and active transfer switches are controlled so as to prevent such a threshold from being exceeded. Alternatively, or in addition, active transfer switches are controlled such that they, in the event of an interruption in the power being provided by the primary power feed, either switch to the shared secondary or, in accordance with the aforementioned control, do not switch despite the interruption in power.