Аннотация
In moderate climates short time fluctuations in solar irradiance
and their impact on the distribution grid will become an important
issue with regard to future large scale application of embedded photovoltaic
systems. Several related and important studies from the past are
recalled. The approach that is presented here uses the method of
time scale decomposition of the solar irradiance and derived quantities
in order to determine the power content of fluctuations depending
on their characteristic persistence. Pseudo random time series of
solar irradiance, based on measured values of instantaneous clearness
index are applied as input data. Power flow calculations are carried
out in order to assess the impact of fluctuating solar irradiance
on the grid voltage. The ?fluctuation power index? is defined as
a measure for the average frequency of occurrence of fluctuations
of a specific persistence. A typical scenario is simulated and the
results are interpreted.
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