PV tracking data needed in the optimal design of the azimuthal tracker’s Control program

Abstract

The energetic efficiency of the PV panels can be sensibly increased using tracking systems. In their control program design the main parameters are the motions amplitude and the tracking steps number which are subject of optimization based on maximization of the received direct solar radiation on panel, on minimization of the driving energy for tracking, on PV type and on local meteorological conditions. In the paper, these parameters are analyzed for the azimuthal tracking, based on maximization of the received direct solar radiation on panel for a specific day and cloudless sky. An appropriate numerical simulation model, based on MatLab software, was implemented. The results and the correlations between the parameters, obtained for the daily orientation are in designing the seasonal and yearly tracking control program design.

Optimization of solar power by azimuthal angle and neural network control of a PV module

“…The local system and global system are the two angular systems which established the sun-ray angular position [8].Local system known as azimuthal system having coordinate X0Y0Z0 and global system known as equatorial system having coordinate XYZ .An observer Q on Earth in local system and point O on the center of earth in equatorial system (see in Fig. 1 and 2).…”

“…1 known as latitude angle and the position of the sun-ray in XYZ coordinate is defined by declination (δ) and hour angle (ω) in Fig. 1 [8,9].…”

“…Other parameter are selected as N = 91, δ =+4.41 and φ = 30.0N. A matrix expression has been developed using these angles for the unit vectors of the sun-ray and of the tracked panel normal [8,9].…”

“…The dot product of their unit vectors gives the expression of incidence angle [8] TR is the lost radiation factor. Lambert's cosine law defines the received radiation by panel which is a part of available direct radiation Rd.…”

PV orientation data needed in the design of the pseudo-equatorial tracker’s control program

“…Using the general geometrical correlations Earth-Sun [1; 4; 6; 7] and working methodology described in paper [7], in this paper there are presented the analytical modeling and numerical simulations regarding the minimum steps' number, which are needed in the optimization of the tracking control program for a pseudo-equatorial PV tracking system. First, the correlations afferent to the pseudo-equatorial tracked panel are modeled and by means of them there are simulated and analyzed comparatively the energetic contributions of the tracking cases with 0, 1, 2, 3 and 4 orientation steps; then, there are analyzed comparatively the energetic contributions of the pseudo-equatorial dual-axis tracking vs. the azimuthal dual-axis tracking, approached in the paper [7].…”