THE DEVELOPMENT OF A COMPUTERIZED ANALYZER FOR LOW-VOLTAGE POWER NETWORK

Magistrsko delo predstavlja realizacijo merilnega instrumenta za analizo nizkonapetostnega energetskega omrežja. Izvedena je tudi raziskava trga, kaj potencialni kupci od takšnih merilnih instrumentov pričakujejo. Ugotovitve iz raziskave trga se delno implementirajo v sam produkt. Pridobljene informacije lahko uporabimo tudi za druge namene, kot je promocija izdelka, ali podlaga pri načrtovanju produkta nove generacije. V prvem delu magistrske naloge je izvedena raziskava trga, s katero pridemo do spoznanj potreb potencialnih kupcev takšnih merilnih instrumentov. Izveden je celovit marketinški raziskovalni proces, v katerem s pomočjo strukturiranega vprašalnika pridobimo informacije o ciljni skupini. Pridobljene informacije se nato analizirajo in predstavijo. V drugem delu magistrske naloge je realiziran tehnični projekt merilnega instrumenta. Predstavljena je teoretska podlaga za analizo nizkonapetostnega energetskega omrežja. Prav tako so opisani standardi, po katerih se morajo meritve izvesti. Opisana je programska in strojna oprema potrebna za realizacijo takšnega merilnika. V nadaljevanju je predstavljena programska koda in čelna plošča. Opravljena je meritev napetosti, frekvence in harmonske popačitve trifazne priključne napetosti. Predstavljen je tudi primer meritve moči trifaznega asinhronskega motorja, kot alternativni primer uporabe takšnega merilnika.Master\u27s degree represents a realization of measuring instrument for low voltage power network analysis. Performed is also a research of potential market of such instrument. Findings from market research can be implemented into the product. Gathered information from market research can also be used for promotion and developing of the next generation product. In the first part of master\u27s thesis a market research that give us information about potential buyers of such product is preformed. With marketing research process and with a structured questionnaire we got information about potential buyers. Gathered information was then analyzed and presented. The second part of the masters\u27s thesis present a technical realization of measuring instrument. In further theory necessary for low voltage network power analyzer is presented. Described are also the standards on which the measurement should be conducted. Necessary software and hardware equipment are proposed. Furthermore a software code is also presented. A measurement of three phase voltage signal and analysis of amplitude, frequency and harmonic distortion of that signal is preformed. Finally an example of power measurement of a three phase asynchronous motor as an alternative use of such measuring system is presented