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Solar-Wind Power Generation Project

05/24/2013 - 11:15 AM

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A total of 13 Base Stations (BS) of Telecom Italia’s mobile network which are powered using hybrid solar-wind power generation systems are being progressively put into service. Such BS’s are built in sites which exhibit favourable weather conditions in terms of exposure to solar radiation and wind presence and speed.
Such sites have been identified via a comprehensive measurement campaign which has been carried on a number of potentially suitable locations using weather stations specifically designed and built in Telecom Italia’s laboratories; such stations are equipped with both an anemometer and a solar radiation sensor, and carry on board a data logger for data storage and a GSM modem to transmit data to the control centre (Telecom Italia Lab, in Turin). 
One of such stations (see photograph below) has been built in a place called Località Monte Spada  (1,050 metres above sea level), in the province of Nuoro, Sardinia. At this site the average measured annual wind speed is 5.1 m/sec (at 10 metres above ground level) and the average measured annual solar irradiance is 4.63 kWh/square meter.
Such conditions make it possible to power the BS – whose annual power consumption is around 10,000 kWh - using a combination of a 3 kW wind turbine, that can generate up to 5,000 kWh/year, and a 7.1 kWp  photovoltaic cell array, made of 42 modules, that can generate up to 7,800 kWh per year, thus delivering a total of 12,800 kWh per year. The system is also equipped with a set of backup batteries which guarantee up to 2.4 days of uninterrupted operation in case of failure of the primary power source.

[1] According to IEC 904-3 the amount of energy a solar cell generates in full sunlight is measured in kWp, or kilowatt peak.

 

Radio Base Station - Monte Spada

Built in a place called Località Monte Spada (1,050 metres above sea level), in the province of Nuoro, Sardinia. At this site the average measured annual wind speed is 5.1 m/sec (at 10 metres above ground level) and the average measured annual solar irradiance is 4.63 kWh/square meter.

Radio Base Station - Monte Spada