Photovoltaic Tracker Angle Adjustment to Reduce Rack Blocking
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Solution Overview
Problem
Photovoltaic tracking systems face reduced electric energy yield due to blocking issues between racks caused by uneven terrain or installation errors, leading to suboptimal sunlight utilization.
Innovation Solution
A photovoltaic system with a detection module and controller that adjusts rotation angles of racks to eliminate blocking by detecting blocking parameters, such as illumination and power parameters, and determining photovoltaic rack blocking relationships to optimize energy yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional anti-tracking control is used to rotate trackers based on calculated tracking angles, then the photovoltaic modules can track the sun's movement, but photovoltaic modules may be blocked due to different distances and heights of trackers, reducing electric energy yield
Solution Approach 1:
The system uses detection modules to detect blocking parameters (illumination intensity, power output) of photovoltaic strings in real-time, feeds this information back to the control system, and dynamically adjusts the rotation angles of photovoltaic racks to eliminate blocking. This closed-loop feedback mechanism resolves the contradiction by continuously adapting the tracking angles to actual blocking conditions rather than relying solely on pre-calculated angles.
Solution Approach 2:
The system transitions from static pre-calculated tracking angles to dynamic real-time angle adjustments. The control system dynamically modifies the rotation angles of photovoltaic racks based on detected blocking conditions, allowing the system to adapt to varying terrain and installation conditions. This dynamic adjustment eliminates blocking while maintaining optimal sunlight tracking.
2Productivity
If uniform tracking angles are applied to all trackers, then the system structure is simple, but terrain variations cause blocking and reduce energy yield
Solution Approach 1:
The system applies different rotation angles to different photovoltaic racks based on their local conditions. Each rack's angle is independently adjusted according to blocking detection results for that specific location. This local quality approach allows the system to adapt to terrain variations and installation differences at each position, eliminating blocking while maintaining overall system simplicity through centralized control.
3Productivity
If real-time detection and adjustment of rack angles is implemented, then blocking is eliminated and energy yield improves, but system complexity increases
Solution Approach 1:
The system uses the photovoltaic strings themselves as detection elements by monitoring their power output and illumination conditions. The existing photovoltaic modules serve dual purposes: generating electricity and detecting blocking conditions through their electrical characteristics. This self-service approach reduces the need for additional dedicated detection devices, thereby limiting the increase in system complexity while achieving real-time blocking detection and angle adjustment.
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 improves electric energy yield by eliminating blocking between racks, ensuring uniform sunlight exposure and reducing energy loss through precise angle adjustments based on real-time data and pre-established correspondence models.
Implementation Method 1
Each photovoltaic string in the plurality of photovoltaic strings is configured to convert light energy into electric energy
Data Source
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AI summary
This application provides a photovoltaic system, where the system includes a plurality of photovoltaic racks, a plurality of photovoltaic strings connected to each photovoltaic rack in the plurality of photovoltaic racks, a detection module, and a first controller. Each photovoltaic rack in the plurality of photovoltaic racks is configured to rotate by an angle under control of the first controller. Each photovoltaic string in the plurality of photovoltaic strings is configured to convert light energy into electric energy. The detection module is separately connected to the first controller and the plurality of photovoltaic strings, and is configured to detect blocking parameters of the plurality of photovoltaic strings. The controller is connected to the plurality of photovoltaic racks. The controller is configured to: control, based on illumination angles, the plurality of photovoltaic racks to rotate by an angle, determine a photovoltaic rack blocking relationship based on the blocking parameters of the plurality of photovoltaic strings, and adjust a rotation angle of a first photovoltaic rack or a second photovoltaic rack based on the photovoltaic rack blocking relationship. The photovoltaic rack blocking relationship is used to represent that the second photovoltaic rack is blocked by the first photovoltaic rack.