Razvoj računalniškega modula za merilno napravo uMPPT

BEVC, URBAN (author), Jankovec, Marko (mentor)

V pričujočem delu razvijemo in izdelamo računalniški modul za krmiljenje merilne naprave za testiranje laboratorijskih sončnih celic uMPPT. Na začetku opišemo pomen preizkušanja sončnih celic v širokem razponu okoljskih pogojev in njihov vpliv na staranje celic. Predstavimo obstoječ sistem večkanalnih sledilnikov točke največje moči ter razlog za njegovo dopolnitev z lastnim računalniškim modulom. Računalniški modul je zgrajen na štiri-plastnem tiskanem vezju dimenzij 10 x 10 cm in deluje z modulom Raspberry Pi. Zaradi hitrih signalov v vezju potrebujemo linije z nadzorovano diferencialno impedanco. Modul vsebuje potrebne priključke za uporabo računalnika in priklop na merilni sistem. Za komuniciranje z merilnim delom uporabljamo vodilo RS-485, za kar smo dodali pomožni mikrokrmilnik s pripadajočo programsko opremo. Rezultat je računalniški modul in aplikacija z grafičnim uporabniškim vmesnikom, kar predstavlja osnovo za nadaljnji razvoj programske opreme.

• Language: Slovenian
• Keywords: tiskano vezje, diferencialni par, merilni instrument, sončna celica, fotovoltaika
• Work type: Master's thesis/paper
• Organization: FE - Faculty of Electrical Engineering
• Year: 2019
• PID: 20.500.12556/RUL-107373
• Publication date in RUL: 05.04.2019

Secondary language

• Language: English
• Title: Development of a computer module for the uMPPT measurement instrument

Abstract

The thesis addresses design and development of a computer module for controlling the measuring instrument for testing laboratory solar cells uMPPT. We will describe the importance of testing the solar cells in wide variety of environmental conditions and its impact on solar cells aging. We will introduce the current system of multichannel maximum power point trackers and a reason for supplementing it with its own computer module. Computer module is constructed on a four-layer printed circuit board with dimensions of 10 x 10 cm and is designed to work with Raspberry Pi Compute Module. Because of the high-speed circuitry, we need differential transmission lines that have controlled impedance. Module consists of several connectors that are necessary for connecting a personal computer and the measuring system. A dedicated microcontroller with associated firmware was used for the RS-485 communication interface between measuring unit and the computer module. Result of the thesis is a computer module and application with graphical user interface, which is the base for the future software development.

• Keywords: printed circuit board, differential pair, measuring instrument, solar cell, photovoltaics