Inflated Reflector Clusters for High-Concentration Photovoltaic Power Plants
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Solution Overview
Problem
Solar energy conversion in photovoltaic power plants faces challenges such as reduced efficiency away from peak power points, difficulty in managing large-scale discrete PV cells, and operation under non-ideal conditions like partial sunlight and grid outages.
Innovation Solution
A cost-optimized architecture using inflated reflectors to concentrate light onto high-concentration photovoltaic receivers, with balanced current control and centralized inverter systems to maintain maximum power point operation, and DC current transmission via high-inductance twisted pairs to enhance efficiency and reliability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If photovoltaic cells are deployed in large-scale utility configuration, then power generation capacity increases, but operation at peak efficiency becomes difficult to maintain
Solution Approach 1:
The patent divides the large-scale photovoltaic power plant into multiple independent clusters, each operating at its own maximum power point. This segmentation allows each cluster to maintain peak efficiency independently while collectively providing large power generation capacity. The clusters are electrically isolated and can be managed separately through individual inverters.
2Power
If thousands of discrete PV cells are deployed across square kilometers, then power generation capacity increases, but management complexity increases
Solution Approach 1:
The patent merges multiple PV cells into modular clusters that function as integrated units. Each cluster combines multiple cells with shared control circuitry and support structures, reducing the management burden of individual cell control while maintaining the ability to scale to utility-scale power generation.
3Adaptability or versatility
If photovoltaic cells operate away from maximum power point, then adaptability to varying conditions improves, but conversion efficiency drops
Solution Approach 1:
The patent employs dynamic maximum power point tracking (MPPT) control within each cluster, allowing clusters to independently adjust their operating points in response to varying illumination conditions. This dynamic control ensures each cluster operates at its optimal efficiency point while the overall system adapts to changing environmental conditions across different locations.
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 solution enables photovoltaic power plants to operate near maximum efficiency, maintain performance under adverse conditions, and reduce the levelized cost of energy by optimizing power system design and component utilization.
Implementation Method 1
A solar energy concentrator in the form of an inflated reflector, focuses light onto a high-concentration photovoltaic receiver
Implementation Method 2
high-concentration photovoltaic receiver
Data Source
AI summary
Various techniques are employed alone or in combination, to reduce the levelized cost of energy imposed by a power plant system. Solar energy concentrators in the form of inflated reflectors, focus light onto photovoltaic receivers. Multiple concentrators are grouped into a series-connected cluster that shares control circuitry and support structure. Individual concentrators are maintained at their maximum power point via balance controllers that control the flow of current that shunts this series connection. DC current from clusters is transmitted moderate distances to a centralized inverter. The inductance of transmission lines is maximized using an air-spaced twisted pair, enhancing the performance of boost-type three phase inverters. Cluster outputs are separate from individual inverters in massively interleaved arrays co-located at a central location. Step-up transformers convert inverter voltages to grid voltages, and small transformers provide isolation and voltage step-up only on receiver-to-receiver imbalance currents, typically <20% of the total current.