Abstract–

This study presents the results of research aimed at developing and creating a monitoring system for solar photovoltaic power plants; this system would allow measuring values of key output parameters (generated power, current and voltage, photovoltaic module, and ambient temperatures). The presented monitoring system consists of a measuring device, a computer, a shunt, and thermal sensors. The measuring device was made on the basis of an STM32F415RGT6 microcontroller. It is shown that an operational amplifier with a programmable gain can be used in which the gain can be changed via the SPI interface to 1, 2, 3, 4, 5, 8, 10, 12, 16, or 32. When high and low voltages are measured, this gain is programmatically switched to lower and, vice versa, higher levels. This makes it possible to measure the voltage smoothly in the entire range to high precision and without manual switching. The DS18B20 temperature sensors are used to measure the temperature from –55 to 125ºC. Several programs based on C++Builder are developed to display graphs and the MySQL database and save the measurement results on a computer. Every 15 min the software collects data from the measuring device, displays them in the form of tables, graphs, and also records and stores the data in a MySQL database for further processing and analysis.

中文翻译：

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小型光伏电站监控系统

摘要-

这项研究提出了旨在开发和创建太阳能光伏电站监控系统的研究结果。该系统将允许测量关键输出参数（发电功率，电流和电压，光伏模块和环境温度）的值。提出的监视系统由测量设备，计算机，分流器和热传感器组成。该测量设备是基于STM32F415RGT6微控制器制造的。结果表明，可以使用具有可编程增益的运算放大器，其中可以通过SPI接口将增益更改为1、2、3、4、5、8、10、12、16或32。在测量低电压时，该增益以编程方式切换为较低的水平，反之亦然，变为较高的水平。这使得可以在整个范围内平稳，高精度地测量电压，而无需手动切换。DS18B20温度传感器用于测量–55至125ºC的温度。开发了几个基于C ++ Builder的程序来显示图形和MySQL数据库，并将测量结果保存在计算机上。该软件每15分钟从测量设备收集一次数据，以表格，图表的形式显示它们，还将数据记录并存储在MySQL数据库中，以进行进一步的处理和分析。