Development of software for PV plant optimization. II. Dependence of sizing parameters on the tilt angle of PV modules

Keywords: stand-alone PV plants, sizing procedure, power supply reliability, installation PV plant capacity, power energy production, battery capacity, solar panel tilt angle, solar radiation, irradiance, anisotropic radiation models


Under designing of a stand-alone photovoltaic system
(PVS), the problem of determining the size of main system components,
primarily the area of PV modules and the total battery
capacity is solved usually. It is known many approaches for
such calculations which based on various optimization criteria,
for example, a maximum power generation, a given level of
electricity supply reliability, a minimum initial and operating
costs etc. In this work, the objective function is the energy harvest
for a certain operation period in the year. In developed calculation
the scheme we use the daily energy balance equations with
taking into account the reliability factor of a power supply, and
carry out the joint optimization of the component PVS composition
and the inclination angle of PV modules. This scheme describes
the situations when in summer months the energy production
is excessive and in winter months is weak. The using of
proposed algorithm reduces the required PV module's area and
the respective installed power of PVS compared with conventional
optimization approaches for given load levels and power
supply reliability. The gain in the module's area can reach 14%
with the usual values of the battery capacity. As initial data for
our optimization calculation, the parameters of the PVS equipment
and the average hourly irradiance components are used.
Since the experimental irradiance data refer to the horizontal
plane usually, their transposition on the inclined surface is performed
by one of the known anisotropic diffuse radiation models
(Hay-Davies model in this work). The developed algorithm and
program for optimization of PVS parameters are applicable for
any operation period and for any region for which sufficiently
accurate experimental radiation data are available.


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Gaevskaya, A., & Gaevskii, A. (2017). Development of software for PV plant optimization. II. Dependence of sizing parameters on the tilt angle of PV modules. Vidnovluvana Energetika, (3 (50), 22-34. Retrieved from