Photo-voltaic (PV) and conventional power (CP) stations of 500MW power are compared. An evaluation between CP
and PV stations is carried out according to physical properties, economic indicators and electrical characteristics. It is
shown, that for many parameters PV plant efficiencies exceed those of CP ones. An impact of introducing large PV
stations is also discussed.
Three photo-voltaic commercial panels based on poly-crystal (two panels) and amorphous (one panel) solar cells are analyzed. The behavior of the panels under transients, arising due to instantaneous load changes, is investigated. Two types of transients are analyzed: an instantaneous short-circuiting and an instantaneous open circuiting. It is observed that the solar cell panels behave differently under transients arising due to their short-circuiting and open-circuiting. The transients arising due to instantaneous short-circuiting from an open circuit condition have a character of damped oscillations for all analyzed solar cell panels. The transients arising due to instantaneous open-circuiting from a short circuit condition have a character of exponential growth for all analyzed solar cell panels. The processes developed under above transients are determined by the solar cell panel parameters only, therefore the results obtained cannot be explained by the currently used equivalent diagrams.