Analýza kvality elektrické energie v ostrovních sítích

Abstract

The goal of this thesis is to analyze power quality in Off-Grid system, which isn't connected to distribution network. The supply of electric power to this network comes from renewable resource using solar power source with the ability to accumulate the excess of electric power to use it in times when the actual total sunlight caught on photovoltaic panels isn't enough. The aim of this analysis is to find relations between exceeding qualitative parameters and meteorological quantities. The analyzed data comes from measuring conducted in 2015 which started after the wiring change of network topology of Off-Grid feeding system from AC to DC. The data measured in that year are to answer the key question from the quality of electric energy point of view and whether it is possible to operate autonomic Off-Grid systems which uses photovoltaic supply system, without exceeding the limits of qualitative parameters of electric power, in particular these assumed from European norm labeled ČSN EN 50160 about characteristics of electric power voltage which is supplied from public distribution network.