LabVIEW monitors and plots the voltage, current and energy consumption trend of single crystal photovoltaic panels in real time

This paper introduces a virtual instrument based on low-cost embedded board , Used to monitor and plot the characteristics of photovoltaic panels under real operating conditions . The system design is based on low cost Arduino Acquisition board . The acquisition is carried out through low-cost current and voltage sensors , Data is passed through Arduino Of LIFA Interface in LabVIEW Transmission of . therefore , Can be in LabVIEW Directly obtained on the monitoring platform and plotted under actual conditions PV Panel I-V（ Current and voltage ） and P-V（ power - voltage ） characteristic .

As the world faces the challenge of reducing the use of fossil fuels that pollute the environment , The demand for energy is increasing , This has greatly increased people's interest in renewable energy . Photovoltaic solar power generation is one of the renewable energy sources for power generation , Due to the continuous development of photovoltaic technology and low price , It is the most popular in the world . Due to the popularity of photovoltaic solar energy , Many researchers around the world are working in this scientific field , To promote current knowledge about the technology and improve its cost-effectiveness . therefore , They must have scientific instruments to carry out the required experiments . Track the photovoltaic characteristics of photovoltaic devices （ Current and voltage （I-V） And power - voltage （P-V） curve ） It is the most important and basic experimental test , Any researcher or anyone interested in photovoltaic technology should carry out this test , To get information about their behavior and performance . Different traditional instruments are used to obtain the characteristics of photovoltaic panels , For example, a multimeter . However , By using this instrument , It is likely that the characteristics obtained and tracked manually cannot provide sufficient information about the status of photovoltaic equipment , Because it can't get directly in real time . Besides , The experimental test is very tiring , It takes a lot of time .

On the other hand , You can buy different commercial data recorders on the Internet , Virtual instrument for photovoltaic panel characteristics , for example DAQPro 5300 and CAMPBELL Scientific CR800. Usually , Most data recorders are too expensive and need to be combined with special software , This increases costs and requires additional specific skills . Besides , They also have many shortcomings , Make them customized for specific application needs , Limited in input voltage and input quantity, the photovoltaic system can be monitored with low-cost and flexible design . In this paper , We propose a real-time virtual instrument system based on low-cost hardware , It is used to monitor and track the performance of photovoltaic panels under actual operating conditions P-V and I-V characteristic . The system design of the proposed instrument is based on LabVIEW and Arduino. Current and voltage sensors sense the output current and voltage of the photovoltaic panel . electric current 、 The measured data of voltage and power are directly plotted in LabVIEW On the developed monitoring platform . The main advantages of this technology are its simplicity and the use of low-cost components , for example Arduino UNO plate 、 Low cost current and voltage sensors . Besides , Current of photovoltaic panel 、 voltage 、 Power and characteristics I-V and P-V Directly in LabVIEW Draw in . This is accomplished by building a simple block program .

Schematic diagram

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Communication configuration

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test result

Source code

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