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Geo-Spatial Correlation of Power Output Variability in Randomly Spaced Dutch Urban Rooftop Solar Photovoltaic Systems
B. Elsinga, W.G.J.H.M. van Sark
Subtopic: PV System Reliability and Availability
Event: 28th European Photovoltaic Solar Energy Conference and Exhibition
Session: 5BV.4.47
ISBN: 3-936338-33-7
0,00 EUR
Document(s): poster


In contrast to several studies done on variability within or between (virtual) MW-scale photovoltaic (PV) plants [e.g. T.E. Hoff and R. Perez (2010)] we investigated the aggregated behavior of randomly spaced residential PV-systems in a densely populated urban area in and around Utrecht, the Netherlands. The behavior of such a realistic distributed PV-network is assumed to be substantially different than equivalent and regularly spaced PV panels in a compact array. Nevertheless, qualifiers and instruments like inter-system Ramp Rate (RR) correlation and Mean Output Variability (MOV) can be used to generate statistically important information about a generic PV-network. The characteristic length scale over which variations between PV-systems reached a distance-independent plateau (with a significance of 1=e3 95%), was found to range from 0 to approx. 4 km, with a mean value of 1:6(9) km. This length scale is important for reduction of variability in aggregated output variability. The distance-independent variability plateau was found to be linearly dependent on daily MOV values.