The smart grid is a new generation of standard power distribution grid. The communication infrastructure\nis critical for the successful operation of the modern smart grids. The use of communication\ntechnologies ensures the reduction of energy consumption, optimal operation of the\nsmart grid and coordination between all smart grids� components from generation to the end users.\nThis paper presents an overview of existing communication technologies such as ZigBee,\nWLAN, cellular communication, WiMAX, Power Line Communication (PLC), their implementation\nin smart grids, advantages and disadvantages. Moreover, the paper shows comparison of communication\ninfrastructure between the legacy grid and the smart grid and smart grid communication\nstandards. The paper also presents research challenges and future trends in communication systems\nfor smart grid application.
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