Sustav za mjerenje strujno-naponskih odnosa u gradskoj mreži

master's thesis

• Title (english): System Measurement of Voltage and Current in Power Distribution Networks
• Author: Anton Milošević
• Mentor: Hrvoje Džapo (mentor)
• Committee member: Hrvoje Džapo (predsjednik povjerenstva)
• Committee member: Mario Cifrek (član povjerenstva)
• Committee member: Željka Lučev Vasić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Electrical Engineering and Computing; Zagreb
• Defense date and country: 2020-09-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Computing
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Electrical Engineering

Abstract

U radu je razvijeno sklopovlje i programska potpora mjernog sustava za kontinuirano praćenje strujno-naponskih odnosa u gradskoj mreži. Sustav omogućuje mjerenje efektivne vrijednosti struje i napona te mjerenje faznog odnosa između tih dviju veličina. Mjerni sustav temeljen je na mikrokontroleru STM32H745 za upravljanje periferijskim sklopovljem i obradu signala, strujnom senzoru ACS725 i mjernom transformatoru ZMPT107-1. U sustav je uključen dodatni mikrokontroler ESP8266EX koji služi za povezivanje sustava s Wi-Fi mrežom i prikaz mjernih rezultata putem lokalnog web servera, a s glavnim mikrokontrolerom se povezuje putem UART komunikacijskog protokola. Provedena je eksperimentalna verifikacija mogućnosti mjernog sustava te je pokazano da su nesigurnosti mjerenja napona, struja i faznog kuta među njima unutar očekivanih granica.

Abstract (english)

In this thesis the hardware and software needed for a measurement system for continuous monitoring of current and voltage relationships in electrical power grid was developed. The system enables the measurement of current and voltage RMS values and the measurement of the phase relationship between these two values. The measuring system is based on the STM32H745 microcontroller for peripheral control and signal processing, ACS725 current sensor, and ZMPT107-1 measurement transformer. The system includes an additional microcontroller ESP8266EX, which is used to connect the system over a Wi-Fi network and to display measurement results via a local web server. The additional microcontroller is connected with the main microcontroller via a UART communication interface. An experimental verification of the measuring system capabilities was performed and it was shown that the measurement uncertainties of the voltage, current and phase angle measurements are within the expected limits.

• Keywords: mjerenje struje; mjerenja napona; mjerenja faznog kuta; Hallov senzor; transformatori; mjerni uređaji; ARM mikrokontroleri; ESP8266 mikrokontroler
• Keywords (english): current measurement; voltage measurement; phase angle measurement; Hall sensor; transformers; measurement devices; ARM microcontrollers; ESP8266 microcontroller
• Language: croatian
• URN:NBN: urn:nbn:hr:168:974139
• Study programme: Title: Electrical Engineering and Information Technology; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije (magistar/magistra inženjer/inženjerka elektrotehnike i informacijske tehnologije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Closed access
• Created on: 2023-01-13 13:14:00