Present power grids are getting replaced by smart grids, mainly for improving performance of existing power grid. Integration of electrical, electronics and computer science have led this technology more popular. Smart grid technology is characterized by full duplex communication, automatic metering infrastructure, renewable energy integration, distribution automation and complete monitoring and control of entire power grid. Wireless sensor networks (WSNs) are small micro electrical mechanical

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... ystems that are deployed to collect and communicate the data from surroundings. Security of wireless sensor based communication network is a major concern for researchers and developers. The address oriented design and development approach for usual communication network requires a paradigm shift to design data oriented WSN architecture. This paper is presents different communication protocols used in smart grid technology.