Photovoltaic Module Balancing With Real-Time Fault Isolation
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Solution Overview
Problem
Current photovoltaic power generation systems face challenges in identifying and addressing reduced power output from individual modules, leading to inefficient overall power production due to lack of real-time data collection and remote monitoring capabilities, making it difficult to distinguish between insolation issues and module abnormalities.
Innovation Solution
A photovoltaic power generation balancing control system that collects real-time voltage and electric power information from modules, uses node balancing controllers to switch off underperforming modules, and transmits control information to maintain uniform power output, incorporating a gateway unit, real-time control module, and integrated information server for data management and analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If only the output of an inverter of the overall system is measured, then the measurement system is simple, but it is impossible to identify which specific module is in trouble or abnormal
Solution Approach 1:
The patent divides the photovoltaic system into individual module-level monitoring units, where each module has its own measurement capability. This segmentation allows precise identification of which specific module is underperforming, transforming the system from measuring only overall inverter output to measuring each module's contribution separately.
2Measurement precision
If conventional power generation amount forecasting technology is used, then general power generation can be forecasted, but it is difficult to consider the difference in power generation amount of individual modules under the same conditions
Solution Approach 1:
The patent applies local quality by measuring and analyzing specific parameters (current, voltage, power) for each individual module rather than treating all modules uniformly. This allows the system to detect and respond to local variations in module performance, identifying which specific modules are underperforming based on their unique electrical characteristics.
3Reliability
If real-time monitoring of all photovoltaic modules is implemented, then individual module performance can be identified, but the system complexity and cost increase significantly
Solution Approach 1:
The patent employs a universal control unit that can manage multiple photovoltaic modules through a standardized communication interface. This multi-functional control unit reduces system complexity by providing a centralized management approach rather than requiring separate control systems for each module, while still enabling individual module identification and control.
4Productivity
If underperforming modules are not switched off, then all modules continue to operate, but the overall power generation efficiency is reduced due to uniform output requirements
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors the power generation output of each module and automatically switches off underperforming modules when their output falls below a predetermined threshold. This automated feedback loop eliminates the need for manual intervention while optimizing overall system productivity by preventing low-performing modules from dragging down the entire system's efficiency.
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 system ensures optimal power production by uniformly managing electric power output from photovoltaic modules, enabling efficient identification and management of module issues, and facilitating real-time control and data analysis for improved photovoltaic power generation efficiency.
Implementation Method 1
Photovoltaic power generation is a power generation method of converting sunlight into DC current to produce electricity
Data Source
AI summary
The present invention relates to a system and a method for controlling photovoltaic balancing, the system comprising: photovoltaic modules wherein the photovoltaic modules are connected in series with each other; node balancing control units for blocking and switching the connected photovoltaic modules when measured data fall below current, voltage, and power control data set to control; a gateway unit for storing the measured data; a real-time control module for classifying, comparing, and analyzing the measured data, storing same in a database, and transmitting a control command to the gateway unit; and an integrated information server for monitoring photovoltaic component devices and measured values, analyzing and processing profile information of the component devices, and providing same to the real-time control module.