Design, implementation and experimental testing of a hybrid power supply of remote measuring station in the Surveillance, Alert & Warning System (SAWS)

The paper presents the design, implementation and experimental testing of a hybrid power supply of telecommunication and measuring equipment incorporated in remote measuring stations, which are an integral part of the global Surveillance, Alert & Warning System (SAWS) in the Republic of Serbia. In these systems, it is very important to provide autonomy of permanent, reliable and quality power supply. In this case, the power supply system is in effect based on the use of solar energy i.e., photovoltaic (PV), in combination with the mains power supply 230V, 50Hz. Solar power is the primary source of power during the day, while in night conditions the secondary power supply is a distribution power grid (more precisely, the distribution power which is used for supplying the night street lighting). This hybrid power system is realized with two controlled chargers (MPPT solar and mains with input power factor correction), battery bank 12V/110Ah with the corresponding system for its monitoring and secondary DC/DC power converters for supplying telecommunication and measuring electronic modules. The key implementation and experimental results obtained during the realization of a SAWS remote measuring station on the river Ub (municipality of Ub), will be presented in the paper.