Design of Magnetic Field Harvester with Energy Management Unit to Power Sensors in Smart grid

Abstract

Wireless sensors are used to implement monitoring of electrical devices in smart grid. Monitoring provides reliable power transfer and avoids cascading power failures. A dumbbell shaped magnetic core is developed and optimized to harvest electromagnetic field near bus bars and transformers in electrical substation. The energy thus harvested is used to power wireless sensors and make them self-sustainable. The experimental results show that the proposed core can harvest 1.25mWof output power with 2000 turns when placed in flux density of 9µTrms.The power density is 1.99µW/cm3.Volatge doubler and energy management unit is designed to supply constant power to wireless sensors.