Protection scheme based on IoT in loop distribution system

Loop distribution system is increasing by reasons such as requirements for reliability of power supply and increased renewable energy. In the loop distribution system, protection issues such as maloperation of protection relay may arise. This paper proposes the protection scheme based on Internet of Things (IoT) in loop distribution system. The proposed protection scheme uses currents from both distribution lines in the loop distribution system. The difference between both currents in the normal state and the difference between both currents in the fault state are calculated. By comparing these values, the faulted line is determined and the tie switch is controlled. To verify the proposed scheme, the simulations according to fault location and fault resistance are performed using Electromagnetic Transients Program (EMTP). The simulation results show that the faulted line can be accurately judged by proposed scheme and the outage section can be reduced by tie switch control. © The Korean Institute of Electrical Engineers