Three-Phase Power Supply Backup Control for Data Center Stability
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Solution Overview
Problem
Conventional power supply systems for data centers face instability and high costs due to single-phase or three-phase module failures, excessive input currents, and inefficient backup power utilization, leading to potential damage and increased manufacturing costs.
Innovation Solution
A control method and system that incorporates a three-phase voltage source, power supply modules, backup supply modules with switch elements, a logic control circuit, and a driving circuit to switch and enable backup transforming modules when power transforming modules fail, ensuring stable DC voltage output by balancing phases and utilizing backup power effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-phase module structure is used, then the device complexity is reduced, but the reliability deteriorates because the power cannot be supplied when PFC or DC/DC breaks
Solution Approach 1:
The power supply system is divided into multiple independent phase modules (three-phase structure), where each phase can operate independently. This segmentation allows the system to maintain partial functionality even when one phase fails, thereby improving reliability without significantly increasing overall system complexity.
Solution Approach 2:
A backup power module is pre-configured and kept in standby mode. When a main power module fails, the backup module is automatically activated to maintain power supply. This preliminary preparation ensures continuous operation and improves reliability while keeping the backup system dormant during normal operation to minimize complexity impact.
2Reliability
If a three-phase module structure is used, then the reliability is improved, but the device complexity increases due to requiring three sets of PFCs and DC/DC modules
Solution Approach 1:
Multiple phase modules are merged into a single integrated three-phase power supply system with shared control and protection circuits. This merging approach maintains the reliability benefits of multi-phase operation while reducing overall system complexity by eliminating redundant components and simplifying the control architecture.
Solution Approach 2:
The power supply modules are designed with universal functionality where each module can operate independently or in combination with others. The backup module is designed to be universally compatible with any main module failure scenario, allowing a single backup design to handle multiple failure modes, thereby reducing overall system complexity.
3Reliability
If backup power is equipped for three-phase balance, then the reliability is improved, but the utilization deteriorates because backup power is not used during normal operation
Solution Approach 1:
The system dynamically adjusts the operational state of power modules based on real-time conditions. During normal operation, main modules are active while backup modules remain in standby. When failures occur, the system dynamically switches to backup modules, ensuring continuous utilization adjustment and maintaining high productivity while preserving reliability.
Solution Approach 2:
The system changes operational parameters (active/standby states) of power modules based on system conditions. By dynamically altering which modules are active versus in standby, the system optimizes both reliability (through available backup) and productivity (through efficient resource utilization) without requiring continuous operation of all modules.
4Power
If massive copper lines are used for power deployment, then the power delivery capability is improved, but the manufacturing cost increases
Solution Approach 1:
The power distribution system is segmented into multiple phases and modules, allowing power delivery to be achieved through distributed connections rather than massive centralized copper lines. This segmentation reduces the total amount of copper required while maintaining adequate power delivery capability across the system.
Solution Approach 2:
Power delivery capability is optimized locally at each module level rather than requiring high-capacity copper lines throughout the entire system. Each phase module handles its own power distribution needs, reducing the overall copper requirement while maintaining sufficient local power delivery capability where it is actually needed.
Data Source
AI summary
A control method for a power supply system includes a driving circuit conducting a switch element of a first backup transforming module of a backup supplying module corresponding to a phase of one of a plurality of power transforming modules in an abnormal operation according to a working signal corresponding to the power transforming module in the abnormal operation, when one of the plurality of power transforming modules corresponding to a three-phase voltage source is in the abnormal operation; and the driving circuit latching unconducted switch elements of at least one of undriven second backup transforming module of the backup supplying module corresponding to the phase, after a logic control circuit detects working signals corresponding to all phases of each backup transforming module, and latching unconducted switch elements corresponding to phases different with the phase of the first backup transforming module.