Design of intelligent terminal unit for smart distribution grid

Along with the increasing development of power electronics, IT and communication technologies and the increasing trust in power supply for people, the construction of smart grid is becoming an important development direction of electric power industry throughout the world. As an important part of the smart grid, the smart distribution grid requires the terminal unit to realize information interaction and self-healing technique of the smart distributed grid. The traditional feeder terminal unit can not meet the requirements of the smart distribution grid and must be replaced by the intelligent terminal unit. Firstly, the model of the smart distribution grid is proposed. Secondly, the model of intelligent terminal unit is constructed and its structure and function are presented. Finally, the scheme of the intelligent terminal unit based fault detection, protection, location, isolation and restoration algorithms for smart distribution grid are presented. The simulation results show that the proposed method has high accuracy. It provides a strong support for smart grid to realize the information interaction and self-healing.