Photovoltaic solar energy to a form of obtaining of electrical energy
through photovoltaic panels is denominated.
The photovoltaic panels, modules or collectors are formed by semiconductor devices type diode that, when receiving solar radiation, is excited and caused electronic jumps, generating a small difference of potential in their ends.
The connection in series of several of these fotodiodos allows the obtaining of greater voltages in very simple and apt configurations to feed small electronicses.
On greater scale, the continuous current electrical that they provide the photovoltaic panels can be transformed into alternating current and be injected in the network, operation that is very profitable economically but that it still needs subventions for a greater viability.
In isolated surroundings, where little electrical power is required and the access to the network is difficult, like weather stations or retransmitters, the photovoltaic plates like economically viable alternative are used. The process, simplified, would be the following one: The energy to low tensions (800 V) and in DC is generated.
One becomes with an investor in alternating current. by means of a transformation center kV becomes to Average tension (15 or 25) and it is injected in the networks of transport of the company.
Production of photovoltaic solar energy Germany is at the present time the second world-wide producer of photovoltaic solar energy after Japan, with near 5 million square meters of installed photovoltaic modules, although it only represents 0.03% of his total power production.
The sale of photovoltaic panels has grown in the world to the annual rate of 20% in the Nineties. In the UE the annual average growth is of 30%, and Germany has 70% of the installed power.
The present growth of the photovoltaic solar facilities is determined by the different programs from support of the governments.
In Spain, the present government has made a support decisive of this type of energies and possibly in the horizon of year 2020 (objective of the Europe Union of the 20% of Renewable Energies), Spain will lead with foreseeable a 8% of the total of the Energy consumed in the country comes from this type of solar technologies (thermoelectrial photovoltaic +).
That is to say, in the power aspect, the Spanish society sentira that within the world-wide panorama as far as generation of clean energies, uses of quality, well-being and prosperity for its citizens has been guessed right.