Photovoltaic String Address Determination via Master Node Voltage Detection
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Solution Overview
Problem
Existing photovoltaic power generation systems lack a method to determine the physical address of photovoltaic strings, which is essential for precise monitoring and maintenance, especially when multiple strings are involved.
Innovation Solution
A method and apparatus that utilize a master node to control and detect the input voltage of slave nodes, grouping them into photovoltaic strings based on superposition phenomena during sequential startup, and determining physical addresses by comparing voltage increments, allowing for automatic identification of photovoltaic string locations without manual intervention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If voltage monitoring apparatuses are used to determine physical addresses of optimizers in photovoltaic strings, then the physical address of optimizers can be determined, but the physical address of photovoltaic strings themselves cannot be determined
Solution Approach 1:
The master node is designed to perform multiple functions: it monitors voltage to determine optimizer addresses within strings, and simultaneously determines the physical addresses of the photovoltaic strings themselves. This multi-functional approach resolves the limitation where only optimizer addresses could be determined previously.
Solution Approach 2:
The master node acts as an intermediary between the voltage monitoring apparatuses and the photovoltaic string identification system. It receives voltage data from monitoring apparatuses and uses this information to infer and determine the physical addresses of photovoltaic strings, thereby enabling string-level location identification.
2Measurement precision
If manual methods are used to identify photovoltaic string locations, then physical addresses can be assigned, but manual errors increase and system efficiency decreases
Solution Approach 1:
The system performs self-identification of photovoltaic string physical addresses by automatically analyzing voltage monitoring data. The master node autonomously determines string addresses based on voltage characteristics during sequential startup, eliminating the need for manual intervention and reducing human error while improving configuration efficiency.
Solution Approach 2:
The system uses voltage monitoring feedback to automatically determine physical addresses. During sequential startup of photovoltaic strings, the master node monitors voltage changes and uses this feedback information to identify and assign physical addresses to each string, creating an automated closed-loop identification process.
3Extent of automation
If sequential startup detection is performed to group slave nodes into photovoltaic strings, then automatic string identification is achieved, but the detection process becomes more complex
Solution Approach 1:
The system employs periodic sequential startup of photovoltaic strings to enable automatic identification. By controlling strings to start up in a predetermined sequence and monitoring voltage changes during each startup phase, the master node can automatically group slave nodes into strings and determine their physical addresses through this periodic detection process.
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
Enables accurate and automated determination of photovoltaic string addresses, improving system stability and efficiency by allowing for timely anomaly detection and elimination, reducing manual errors, and expanding system functionality.
Implementation Method 1
detecting a change status of an input voltage of the master node
Implementation Method 2
each photovoltaic power generation group includes one photovoltaic module and one slave node
Data Source
AI summary
A physical address determining method, apparatus, and device, and a storage medium, and belongs to the field of solar power generation, includes: controlling at least two slave nodes to sequentially start up, and detecting a change status of an input voltage of the master node; dividing a photovoltaic power generation system into a plurality of photovoltaic strings; and for each candidate photovoltaic string, controlling any slave node located in the candidate photovoltaic string to start up and other slave nodes to shut down, and using the physical address as a physical address of the candidate photovoltaic string. This disclosure provides a manner of automatically determining a physical address of a photovoltaic string, thereby implementing photovoltaic-string locating and expanding a system function range. When an anomaly occurs, the anomaly can be eliminated in a timely manner, thereby improving system stability.