Power Supply System Converter Deactivation Voltage Stability
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Solution Overview
Problem
Existing power supply systems deactivate units during light-load conditions, leading to instability and voltage drops when load suddenly changes, particularly affecting information processing systems like servers.
Innovation Solution
A power supply system with a converter unit, power storage device, driving stop, and driving start sections, where the power storage device assists in maintaining stable voltage by activating inactive converters when the load factor reaches 50% of the rated load, reducing power conversion losses and ensuring stable voltage supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If one or more converters are deactivated during light-load conditions, then power conversion efficiency is improved, but voltage stability deteriorates when load suddenly changes
Solution Approach 1:
The power storage device is charged in advance during light-load conditions when converters are deactivated. When load suddenly increases, the pre-charged power storage device immediately discharges to supplement power, preventing voltage drops and ensuring smooth transition when converters are reactivated.
Solution Approach 2:
The power storage device acts as an intermediary between the converter unit and the load. It buffers power fluctuations by charging during low demand and discharging during high demand, mediating the transition when converters are deactivated or reactivated to maintain voltage stability.
2Loss of energy
If one or more converters are deactivated during light-load conditions, then power conversion efficiency is improved, but response speed to load changes deteriorates
Solution Approach 1:
The power storage device is charged in advance during light-load conditions. When load suddenly increases, it immediately discharges to provide power until converters are fully reactivated, bridging the response time gap and ensuring no power shortage occurs during the activation transition.
Solution Approach 2:
The power storage device automatically charges during light-load conditions and automatically discharges when load increases, providing self-service power regulation without requiring complex control systems to manage the transition between deactivated and activated states.
3Loss of energy
If the load factor of operating converters is increased during light-load conditions, then power conversion efficiency is improved, but the ability to handle sudden load increases deteriorates
Solution Approach 1:
The power storage device accumulates energy in advance during light-load conditions when converters operate at high load factors. When sudden load increases occur, the pre-charged power storage device immediately supplements power, enabling the system to handle peak demands even though converters were operating at high capacity.
Solution Approach 2:
The power storage device serves as a buffer between the high-load operating converters and the load. It absorbs power during low demand and releases it during high demand, mediating the mismatch between converter capacity utilization and actual load requirements.
Data Source
Figure 1
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AI summary
A power supply system (100) includes a converter unit (12), a battery module (14) connected in parallel to the converter unit (12) and configured to supply power to a load (13), and a monitoring and controlling device (15) configured to deactivate one or more of converter sections (12A, 12B, 12C) and to start driving the inactive converter section(s) (12A, 12B, 12C) in accordance with a light or heavy state of the load (13). When the output voltage of the battery module (14) becomes higher than the output voltage of the converter unit (12) when one or more of the converter sections (12A, 12B, 12C) are inactive, the output voltage of the battery module (14) is supplied to the load (13). The monitoring and controlling device (15) starts driving the inactive converter section(s) (12A, 12B, 12C) by the time the output voltage of the battery module (14) exceeds the output voltage of the converter unit (12).