Development of a Hybrid Power Supply Control Prototype for Solar-Powered Water Tank Pumping System

摘要

Urban water tank pumping systems generally runs on grid electricity. However, in an event of power failure, such systems will be unable to function. This research developed a hybrid solar power water tank pumping system prototype, which can utilize electricity provided both by electricity grid and solar photovoltaic. The novelty of this prototype is that it automatically switches from grid electricity to the solar system during a power failure. Accordingly it is able to automatically fills when the water tank is empty and stops when the water tank is full using the mechanic sensors being able to detect the water level. Its component used includes a photovoltaic, an upper and a bottom limit switch, a 660 Watts inverter, a control panel, a battery and a solar charge controller. The testing of the prototype showed that the switching from grid electricity to solar power took 30 seconds.