Parallel Power Conversion Modules Droop Control Efficiency
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Solution Overview
Problem
In power conversion systems with multiple modules connected in parallel, equally distributing processing power leads to inefficient operation and uneven lifespan management due to differences in module characteristics, resulting in suboptimal system efficiency and lifespan.
Innovation Solution
Implementing a power conversion system where each module adjusts its current supply based on output voltage using droop logic, allowing for dynamic setting of module currents to maximize efficiency and extend lifespan, with a device monitoring and controlling these adjustments to optimize overall system performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the same processing power amount is applied to all power conversion modules, then the lifespan management of modules is simplified, but the overall system efficiency becomes low
Solution Approach 1:
The patent applies local quality by assigning different processing power amounts to different power conversion modules based on their individual efficiency characteristics. High efficiency modules receive higher processing power amounts while low efficiency modules receive lower processing power amounts, optimizing overall system efficiency while maintaining balanced lifespan management across all modules.
2Duration of action of moving object
If equal processing power amounts are distributed to all modules, then lifespan equality is maintained, but modules with low efficiency characteristics rapidly reduce their lifespan
Solution Approach 1:
The patent changes the parameter of processing power amount from a uniform value to variable values based on efficiency characteristics. By adjusting the processing power amount parameter according to each module's efficiency level, the system maintains similar lifespan durations across modules while preventing rapid lifespan reduction in low efficiency modules.
3Productivity
If processing power amounts are adjusted according to efficiency characteristics, then system efficiency improves, but control complexity increases
Solution Approach 1:
The patent implements feedback control where the controller monitors the efficiency characteristics of each power conversion module and automatically adjusts the processing power amounts accordingly. This feedback mechanism optimizes system efficiency while managing control complexity through automated adjustment based on real-time module performance data.
Data Source
AI summary
A power conversion system including: a first power conversion module configured to change a current (first module current) supplied to an output node, to monitor efficiency of the power conversion system according to the change in the first module current, and to determine a setting value of the first module current to increase the efficiency; and a second power conversion module configured to control a current (second module current) supplied to the output node according to a voltage (output voltage) formed at the output node.