A smart grid will require, to greater or lesser degrees, advanced tools for planning and operation, broadly accepted communications platforms, smart sensors and controls, and real-time pricing. The smart grid has been described as something of an ecosystem with constantly communication, proactive, and virtually self-aware. The use of smart grid has a lot of economical and environmental advantages; however it has a downside of instability and unpredictability introduced by distributed generation (DG) from renewable energy into the public electric systems. Variable energies such as solar and wind power have a lack of stability and to avoid short-term fluctuations in power supplied to the grid, a local storage subsystem could be used to provide higher quality and stability in the fed energy. Energy storage systems (ESSs) would be a facilitator of smart grid deployment and a "small amount" of storage would have a "great impact" on the future power grid. The smart grid, with its various superior communications and control features, would make it possible to integrate the potential application of widely dispersed battery storage systems as well other ESSs. This work deals with a detailed updated review on available ESSs applications in future smart power grids. It also highlights latest projects carried out on different ESSs throughout all around the world.
A prototype of wireless power transmission (WPT) system has been designed in small scale which can be used to drive portable electronic devices. For power transmitting purpose RF/microwave has been used. A detail discussion on transmitting and receiving antenna of WPT system has been presented. The step by step design method has been used in designing the entire system. Then, a simple practical approach has been demonstrated. The detail performance on the practical implementation of wireless power transmission system has been analyzed. The 4GHz designed system provides 2W receiving power when the transmitter sends 20W from a distance of 52m. The difficulties and limitations for implementing the designed model in the laboratory have been featured. Then, the ideas for overcoming the limitations also have been proposed.
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