Power Quality in Islanded Microgrids
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Sähkötekniikan korkeakoulu | Master's thesis
Sustainable Energy Systems and Markets
Master's Programme in Advanced Energy Solutions
AbstractThe interest in Microgrids (MGs) has been recently increasing due to their capability to incorporate increasing shares of Distributed Generators (DGs) into the power system. In addition, their islanding capability and the fact that all generators in a MG can be controlled are the main reasons for the popularity of microgrids. However, high shares of energy generation from Renewable Energy Sources (RESs) and the increasing utilization of power electronics can lead to Electric Power Quality (EPQ) issues in islanded MGs. The severity of these issues is linked to the penetration levels of renewable energy generators such as Photovoltaic (PV) systems. This study investigates the effect of PV systems on the voltage flicker severity in islanded MGs considering different converter control strategies. Results indicate potential long-term flicker issues even under constant load considerations.
Thesis advisorMillar, John
islanded microgrids, electrical power quality, voltage flicker, modified Newton-raphson, droop-control, PQ control