PV Tracker Angle Control for Row-to-Row Shading Loss
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Solution Overview
Problem
Photovoltaic modules in a front row shade those in a rear row, reducing the power generation amount due to varying sun irradiation angles in the morning or evening, which affects the overall energy output of photovoltaic arrays.
Innovation Solution
A tracker tracking method that acquires irradiation data and initial tracking angles to adjust the angles of photovoltaic modules using different adjustment modes, establishing a micro-shading model to optimize power generation by reducing shading effects, including reducing or increasing tracking angles and adjusting the gear of photovoltaic modules based on the micro-shading model.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If photovoltaic modules are arranged in a fixed array configuration, then the structure is simple and easy to install, but the front row modules shade the rear row modules during morning and evening sun irradiation, reducing power generation amount
Solution Approach 1:
The patent applies the dynamics principle by transitioning from a fixed array configuration to a dynamic tracking system where photovoltaic modules can adjust their angles independently. Each module is equipped with a tracker that enables real-time angle adjustment based on sun position and shading conditions, allowing the system to adapt continuously and maximize power generation throughout the day while avoiding shading losses.
Solution Approach 2:
The patent implements parameter changes by adjusting the tracking angles of photovoltaic modules based on calculated optimal values. The system dynamically modifies the inclination and azimuth angles of each module according to irradiation data, sun position, and shading analysis, enabling the modules to maintain optimal orientation relative to the sun while preventing mutual shading.
2Productivity
If the tracking angle of photovoltaic modules is adjusted to avoid shading, then power generation loss due to shading is reduced, but the complexity of the tracking system increases
Solution Approach 1:
The patent applies segmentation by dividing the photovoltaic array into independent modular units, each with its own tracker and control capability. Instead of moving the entire array or using a centralized complex mechanism, each photovoltaic module operates independently with its own angle adjustment system, simplifying the overall control architecture while enabling precise individual optimization to avoid shading.
Solution Approach 2:
The system implements self-service through autonomous operation where each photovoltaic module's tracker independently calculates and executes optimal angle adjustments based on local irradiation conditions and shading analysis. The modules self-regulate their positions without requiring complex centralized coordination, reducing control system complexity while maintaining optimal power generation.
3Ease of operation
If uniform tracking angles are applied to all photovoltaic modules, then the control system is simple, but modules in different positions experience different shading effects that cannot be optimized
Solution Approach 1:
The patent implements local quality by enabling each photovoltaic module to have its own customized tracking angle based on its specific position in the array. The system calculates individual optimal angles for each module considering its unique shading environment, orientation, and irradiation conditions, allowing localized optimization rather than applying uniform control, thereby maximizing total power generation while maintaining manageable complexity through modular independent control.
Data Source
AI summary
A tracker tracking method and system, a photovoltaic device, and a medium are provided. The tracker tracking method comprises: acquiring irradiation data of respective target photovoltaic modules; acquiring initial tracking angles of the respective get photovoltaic modules, adjusting tracking angles of the target photovoltaic modules and calculating total power generation amounts of the target photovoltaic modules corresponding to different adjustment modes for the tracking angles according to the irradiation data and the initial tracking angles; and determining target adjustment modes for the tracking angles of the target photovoltaic modules based on the total power generation amounts of the target photovoltaic modules.