Selection of power supply system for telecom stations in remote areas

Remote area telecom solar system generally includes power generation equipment, energy storage equipment, energy conversion and manage equipment. Power generation equipment has diesel generator, photovoltaic array, wind power generator or hydro generator. Storage equipment generally is battery or storage pool. Energy conversion and management equipment have DC converter, inverter and other equipment.

Diesel generator is the energy source of the power supply system in many remote areas, in order to obtain the maximum fuel efficiency and reduce the maintenance, need to maintain the load rate at 60% ~ 70% of the rated load capacity of the generator. The output power of the wind power generator can reach 250W~500kW, but it needs to select the proper wind field, and has the stable wind speed. Although the power generation cost is relatively low, it is necessary to select the construction in the moderate and stable River, the generator’s cost is relatively low, but the cost of the generator is high.

The telecom network require telecom station equipment to provide 7 * 24 hours of stable operation, not only distribute in the urban areas, but also in the desert, mountain island, covering a broad area, generally unattended, has high requirements on power supply reliability and life. Solar hybrid system convert solar energy into electrical energy directly, provide -48V voltage to telecom station by series and parallel PV modules, realization of static energy transform, compared with mechanical rotating parts of the generator, less maintenance workload. It is suitable for remote area power supply system which telecom station load is less than 2kW, especially in the background of the development trend of global crude oil prices, the cost advantage of telcom station solar system is increasingly obvious.