Parallel Power Modules Autonomous ON-OFF Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Power distribution systems face challenges in dynamically matching power between multiple paralleled power modules and a load, particularly in avoiding oscillations during status switching due to load fluctuations, and ensuring efficient operation of each power module.
Innovation Solution
A power distribution system with a controller that assigns unique numbers to each power module, allowing them to independently determine their ON and OFF statuses based on total numbers and thresholds, ensuring efficient operation and minimizing oscillations by dynamically adjusting their status in response to load changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If multiple power modules are paralleled to increase power supply capacity, then the power supply capacity is improved, but the complexity of matching power between modules and load increases
Solution Approach 1:
Each power module independently determines its own ON/OFF status by comparing its unique number against a dynamically updated threshold value. The module autonomously decides whether to join or leave the active set based on local computation, eliminating the need for complex centralized coordination and reducing overall system complexity while maintaining power matching capability
Solution Approach 2:
The centralized control function is segmented and distributed to each power module. Instead of one controller managing all modules, each module receives the total module count and unique number, then independently computes its status decision. This segmentation simplifies the control architecture and reduces communication overhead
2Productivity
If power modules dynamically switch ON/OFF status to match load requirements, then power matching efficiency is improved, but oscillations occur during status switching
Solution Approach 1:
The hysteresis mechanism prevents oscillations by creating a buffer zone around the threshold value. When the threshold equals a module's unique number, that module is prevented from switching status, effectively blocking the oscillation pathway. This preliminary anti-action stabilizes the system composition during dynamic load changes while maintaining power matching efficiency
Solution Approach 2:
The threshold value is dynamically adjusted based on the count of active power modules. As modules join or leave the active set, the threshold changes accordingly, creating a moving target that prevents repeated switching. This parameter change strategy enables efficient power matching while maintaining system stability
3Productivity
If centralized control is used to coordinate power modules, then power matching is achieved, but the control complexity and communication overhead increase
Solution Approach 1:
Each power module independently determines its own ON/OFF status by comparing its unique number against a dynamically updated threshold value. The module autonomously decides whether to join or leave the active set based on local computation, eliminating the need for complex centralized coordination and reducing overall system complexity while maintaining power matching capability
Solution Approach 2:
Each power module is designed with universal functionality to perform both power conversion and autonomous status decision-making. The same hardware and control logic are used by all modules, allowing them to independently execute the threshold comparison algorithm. This universality simplifies the control architecture by eliminating specialized control hardware while maintaining power matching capability
Data Source
AI summary
An exemplary power distribution system includes multiple power modules and a controller. The multiple power modules are coupled in parallel to supply power to a load. The controller is configured to provide a total number of the power modules and unique numbers to each member of the power modules. At least a member of the multiple power modules is set up to independently determine its own ON status and OFF status based on the total number and the unique numbers when the power distribution system is in operation, wherein an ONthreshold in association with a corresponding unique number is determined to decide its own ON status. A method for operating the power distribution and an energy distribution system are also described.