Research On Intelligent Reclosing Cooperated By Combined Fault Location Method

With the rapid development of UHV DC transmission, there is an increasing demand for the construction of AC/DC hybrid systems. Because the AC/DC hybrid system requires high system stability on the AC side, an intelligent reclosing strategy is needed to ensure that the line will not reclose after a permanent fault occurs. Based on the traditional voltage criterion, this paper has proposed a new discriminant that can stably distinguish the fault type to reduce the error judgment range, maintain the stability of the power system and ensure the safe and continuous operation. This paper also did a simulate with the RTDS (Real-time Simulation System) to verify the accuracy and reliability of the new discriminant.