Photovoltaic battery online monitoring and intelligent management system

Abstract

The invention mainly relates to a photovoltaic battery online monitoring and intelligent management system capable of performing real time online monitoring on necessary parameters including voltage,current, temperature and the like of each battery panel in a photovoltaic assembly array as well as necessary parameters including voltage, current and the like of a battery pack string formed by serial connection of a plurality of photovoltaic battery strings. A data collector transmits a part of data to a cloud server as light weight data and stores a part of data in the local as permanent data.The light weight data can be read in the cloud end and the permanent data can be read in the local of the data collector. Therefore, a basis is provided for knowing real operation state of the battery and solving problems in fault positioning of the battery.

Description

technical field [0001] The invention mainly relates to the field of photovoltaic power generation, to be precise, it provides an online monitoring and intelligent management system for photovoltaic cells, which can conduct real-time online real-time online monitoring of necessary parameters such as voltage, current and temperature of each battery panel in the photovoltaic module array. Monitoring, the necessary parameters such as the voltage and current of the battery string composed of multiple photovoltaic cells connected in series can also be monitored online in real time, providing a basis for monitoring the real operating status of the battery and solving the fault location of the battery. Background technique [0002] With the increasingly severe environmental and traditional energy problems, more and more countries and regions have paid attention to photovoltaic power generation technology and regarded it as a priority development object, and photovoltaic power generat...

AI Technical Summary

Problems solved by technology

Furthermore, it is a well-known problem that many factors will lead to a decrease in the power generation efficiency of photovoltaic modules, such as manufacturing differences between photovoltaic modules, installation differences, or shadow shading or maximum power tracking adaptation, etc.

Taking shadow shading as an example, if some photovoltaic modules are blocked by clouds, buildings, tree shadows or dirt, some of the modules will change from power sources to loads and no longer generate electricity. When some batteries cannot generate electricity due to poor performance or shadow occlusion, the efficiency loss of the entire string of battery strings is very serious, and when the inverter, especially the centralized inverter, is connected to a large number of battery panel arrays, It will cause the battery panels of each string to not be able to operate at their maximum power point, which is the cause of the loss of electric energy and power generation

Another problem is that the local temperature of photovoltaic modules may be high in places where the hot spot effect is severe, and some even exceed 150°C, which will cause local areas of modules to burn or form dark spots, solder joints to melt, packaging materials to age, glass to burst, Permanent damage such as ribbon corrosion has caused great hidden dangers to the safety and reliability of photovoltaic modules

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