Module-Level Solar Power Conversion for Variable I-V Conditions
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Solution Overview
Problem
Solar energy generation systems face inefficiencies due to variations in current-voltage characteristics caused by environmental and aging factors, leading to suboptimal performance of solar modules despite the use of Maximum Power Point Tracking (MPPT) technology.
Innovation Solution
A solar energy optimization device comprising multiple conversion circuits and control circuits connected in series with MPPT circuits, where the control circuits adjust conversion parameters to increase output voltage, optimizing the output power of each solar module based on photovoltaic current.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If Maximum Power Point Tracking (MPPT) technology is applied to solar modules, then power extraction is optimized under ideal conditions, but performance deteriorates when environmental factors cause variations in current-voltage characteristics
Solution Approach 1:
The patent divides the solar array into multiple independently controllable modules, each with its own DC-DC converter and control circuit. This segmentation allows each module to operate independently at its optimal power point, compensating for environmental variations affecting individual modules while maintaining overall system productivity.
Solution Approach 2:
The patent implements dynamic control by continuously adjusting the operating parameters of each solar module through feedback control circuits. The system dynamically adapts to changing environmental conditions by real-time modification of duty cycles and conversion ratios, ensuring optimal performance despite variations in current-voltage characteristics.
2Productivity
If individual optimization of each solar module is implemented, then output power is maximized, but system complexity increases due to multiple conversion circuits and control circuits
Solution Approach 1:
The patent employs identical DC-DC converter modules and control circuits for each solar module, creating a universal building block that can be replicated across the system. This modular universal design achieves individual optimization for each module while standardizing the approach to minimize overall system complexity and facilitate easier maintenance and scaling.
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
This solution effectively enhances the working efficiency of solar energy generation systems by optimizing output power of each solar module, ensuring maximum power extraction even under varying environmental conditions.
Implementation Method 1
The solar board can convert solar energy into electricity
Implementation Method 2
Each of the conversion circuits is used for converting a photovoltaic voltage of one of the solar modules into an output voltage
Data Source
AI summary
A solar energy optimization device, a solar energy generation system and a power conversion system using the same are provided. The solar energy optimization device includes a plurality of conversion circuits and a plurality of control circuits. Each of conversion circuits is individually connected in series with a solar module. The conversion circuits and the solar modules are connected in series to a maximum power point tracking (MPPT) circuit. The MPPT circuit is configured to determine a photovoltaic current according to the solar modules. Each of the conversion circuits is used for converting a photovoltaic voltage of one of the solar modules into an output voltage. Each of the control circuits is used to adjust a conversion parameter of one of the conversion circuits to increase the output voltage thereof, so that an output power of each of the solar modules is optimized based on the photovoltaic current.