DC power system for Radio Base Station by renewables energy sources

Abstract

The remarkable growing of the energy consumption from fossil fuels and the gases given off by them to the atmosphere promoting the greenhouse effect, has risen exponentially. In the last two years it has experienced an insignificant fall due to the financial crisis in several economic sectors. Moreover, it there had been a launching in the production of electric power from renewable energy sources, most of all wind energy and photovoltaic energy. Pressures from the public community as well as campaigns from respective governments and national and international institutions such as: Kyoto commitment promoting energy efficiency as a result of a decrease in the stores of primary energy and the perception of the climate change requires to set the target 20 20 20 up, in other words for next year 2020 to reduce by 20% the emission of CO2 and to generate by 20% of the produced electric power in renewable energy sources. Otherwise, in the telecommunication industry, the third economy in the world which is not free to these facts, the subscription's demands into mobile phone services and broadband connections are increasing exponentially. The main important energy source consumed by telecommunication operators is electric. Nevertheless, it has been proved that the energy consumption from a usual network of a mobile network operator varies between 1,5 TWh and 9TWh [7] per year, and nowadays it is estimated that the telecommunication's industry consumes about 1% of the global energy consume of the planet.