Reconfigurable Solar Array Power Management
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Solution Overview
Problem
Existing solar arrays fail to provide a constant amount of power over extended periods and require frequent replacements, leading to potential overload conditions for downstream hardware.
Innovation Solution
A reconfigurable solar array system that deactivates and activates solar cell strings based on power thresholds, using shunting plugs or relay switches to manage power output and dissipate heat, allowing for pseudo-constant power delivery and extended lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If solar arrays operate at full capacity continuously, then power output is maximized, but downstream hardware may experience overload conditions and solar array lifespan is reduced
Solution Approach 1:
The solar array system dynamically adjusts its power output by selectively activating or deactivating individual strings based on real-time power measurements. The controller monitors total array output and switches between different string configurations to maintain power within safe thresholds, transforming a static full-capacity system into a dynamic adaptive system that protects downstream hardware while maximizing energy harvest.
Solution Approach 2:
The system changes operational parameters by switching between different combinations of solar cell strings based on power threshold measurements. When power exceeds the maximum threshold, the controller deactivates specific strings; when power drops below the minimum threshold, the controller activates strings. This parameter-based control approach maintains power output within safe operational ranges while extending array lifespan.
2Reliability
If solar arrays are replaced frequently to maintain constant power, then power supply reliability is maintained, but mission time and operational cost increase
Solution Approach 1:
The system performs preliminary actions by proactively managing power output distribution across multiple strings before degradation becomes critical. By continuously monitoring power levels and preemptively switching between string configurations, the system prevents conditions that would necessitate replacement, thereby extending operational lifespan and reducing maintenance frequency.
Solution Approach 2:
The system maintains constant power output by changing operational parameters - specifically, by switching between different string configurations based on real-time power measurements. This dynamic reconfiguration allows the array to compensate for degradation in individual strings, maintaining overall constant power output without requiring physical replacement.
3Power
If all solar cell strings are activated, then maximum power is generated, but heat generation and mass requirements increase
Solution Approach 1:
The system applies partial action by activating only the necessary number of solar cell strings required to meet power demand within safe thermal and structural limits. Rather than continuously operating all strings at full capacity, the controller selectively engages subsets of strings, generating sufficient power while reducing cumulative heat generation and structural mass requirements.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system effectively doubles the lifespan of solar arrays by adjusting power output to match downstream capacity, preventing overload and reducing the need for frequent replacements, while also acting as a heat radiator and eliminating the need for complex shading mechanisms.
Implementation Method 1
Solar arrays may be formed as deployable 'blankets' for these and other uses
Data Source
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AI summary
In one or more embodiments, the present disclosure teaches a method for reconfiguring a solar array (101). The method involves providing, for the solar array, at least one string of solar cells (310). The method further involves deactivating at least a portion of at least one of the strings of solar cells of the solar array when power produced by the solar array reaches a maximum power allowance threshold. In addition, the method involves activating at least a portion of at least one of the strings of the solar cells in the solar array when the power produced by the solar array reaches a minimum power allowance threshold.