Global Power Quality Index application in Virtual Power Plant

One of the VPP aspects are technical requirements concerning power quality (PQ). This work presents an idea and implementation of global power quality index (GPQI) for the assessment of multipoint power quality measurements collected in the area of the VPP. Proposed in this article GPQI has a synthetic character and is based on selected classical 10-min aggregated PQ parameters and additionally extended by extremum 200ms values of voltage changes and total harmonic distortion in voltage. The assessment using proposed GPQI is performed on the basis of real measurements in medium voltage distribution network in the VPP area including: main substation, hydro power plant (HPP), energy storage system (ESS). It was shown that using a proposed index it is possible to indicate mutual relations between substation and HPP and ESS.

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