Automatic tap changing in transformers for power quality enhancement in a smart grid distribution system

A smart grid is an evolved grid system that manages electricity demand in a sustainable, reliable and economic manner, built on advanced infrastructure and tuned to facilitate the integration of all involved. The smart grid is the future for electrical systems. Smart metering circuit consists of power transducers such as AC voltage, AC current, frequency etc. The transducers converts its respective inputs into DC voltage output and fed to analog to digital convertor which converts into digital signals and fed to smart grid system computer. Smart grid computer is fed with information of the individual consumer prepaid amount. The information of this prepaid amount is fed to the respective smart metering circuit and stored. The consumer is allowed to consume power till the recharged amount available and it is interrupted with an automatic isolation circuit until the consumer usage exceeds their prepaid amount.