Title: Bidirectional flow of Green Power, using ZigBee in the last mile network of Smart Grid

Now-a-days Smart Grid is becoming a key element of energy strategies. Several definitions are coming in different literature but the overall meaning of these different definitions are same. Smart Grid is an intelligent monitoring, control and self healing of an electrical system with the help of information (data) communication in between the end user or generating station and control room. This Smart Grid (SG) Technology can be utilized to provide the diversified generation of electricity from different non-conventional Green energy sources and allows transporting the energy to the conventional Grid SubStation from the scattered macro generating points (Consumers’ area) in the system. The main and ultimate goal of the Smart Grid Technology is to reduce the generation of electrical energy from the conventional fossil fuel which is also going to be depleted within a short time, and to increase the scope of non conventional energy from solar panels, wind mill etc. The generation of non conventional green energy will reduce the Carbon di-oxide (CO2) from the environment. It also helps to reduce the production of Green house gasses. In this paper, we propose the network architecture of last mile network of Smart Grid consisting of ZigBee devices with the standard of IEEE 802.15.4. This network will help in the flow of electrical power bi-directionally, in between consumer’s area and conventional distribution grid substation. As a result green power can be transmitted to distribution grid station from consumer premises too. KeywordsChange Over Switch (C/O). Full Function Device (FFD), Power Line Communication(PLC), Reduced Function Device(RFD), Smart Grid (SG), ZigBee, ZigBee Coordinator Device(ZCD), ZigBee End Device(ZED), ZigBee Routing Device(ZRD).