International Journal of Electrical Engineering and Technology (IJEET), vol.5, no.9, pp.1-16, 2014 (Refereed Journals of Other Institutions)
In this study, a smart low voltage distribution system is proposed for buildings with distributed generation and electrical vehicles. The proposed smart low voltage distribution system includes both AC distribution system and direct DC distribution system for the energy requirement of the loads. With the installation of DC distribution system, the restriction for distributed generation and consumer devices to be compatible with AC low voltage distribution system is eliminated. DC and AC distribution systems are interconnected through a rectifier for the supply of DC load increases from AC mains and for unidirectional power flow. Smart low voltage distribution system (SLVDS)is installed along with the smart distribution management systemthat utilizes smart grid technologies for the demand side management by also considering the electricity prices in deregulated market for increasing the power quality and energy efficiency of AC/DC low voltage distribution system. Smart demand side management, power quality monitoring system, smart control of distributed generation, smart charging of electrical vehicle, and similar subsystems are used in conjunction with smart distribution management system. By using the daily load duration curves for summer and winter seasons of the low voltage feeder supplying buildings, a smart demand side management that also takes into account the effects and energy unit prices of electrical vehicles charging systems and photovoltaic systems is introduced in this study.