Nowadays, for a home based backup power supply, rooftop solar photovoltaic (SPV) based inverters are being widely used. The power flow from these inverters are unidirectional i.e. from PV source to domestic load. However, when the battery is fully charged and in the absence of sufficient load, the power from solar PV modules are underutilized. This has led to the usage of grid connected solar PV based configuration. Here the battery can be charged from UG too. However the energy drawn from the grid power is very much dependent on demand tariff which varies from high to low during peak to off peak hours of the day. The issue of battery charging technique and ideal use of solar energy is discussed in this proposed system. The proposed energy management system make critical loads powered without interruption from PV/Battery/UG and charge the storage element during off peak hours only. Hence reducing the consumption charges from UG during peak hours .An effectice energy management method which utilises energy from solar PV to its maximum, storage element and UG, minimising the cost of elecricity to the consumer is proposed.
Volume 11 | 12-Special Issue