Wireless Protective Relaying Scheme for Smart Grid Protection

Integration of Distributed Energy Sources (DESs) with traditional grid besides having many technical advantages, poses technical challenges to power engineers. Bidirectional power flow, dynamic fault currents are the few challenges. The relay settings need to be made adaptive to dynamic fault current levels of power system with DESs. Intelligent Electronic Devices (IEDs) can effectively be deployed to ensure the adaptive operation of relays. The state of operation of distributed energy sources are essential information to be communicated to IEDs to make relaying adaptive. The information and communication technology (ICT) plays a major role in acquiring and communicating the data pertaining to the operating conditions of DES s.This paper proposes a ZigBee based method to transmit the current or voltage values measured at various sections of power system wirelessly.The processor deployed in the control centrereceives and process the received data. Thesuitable command for tripping of circuit breaker in case of any abnormal conditions may be triggered by the processor.