Fault Current Limiter Used In Mine Power System

With the increasingly demanding on the yield and efficiency of coal, mine power supply voltage level and capacity are increasing.Then short current levels of mine power system is more and more higher. It is important to limitate short current level of mine power system.The traditional way of limitating short current is to install splited reactor.But due to there would be voltage loss on the reactor, its limitations have become apparent, and therefore the study of new fault current limiter in mine power supply system is important. Compared with splited reactor, new fault circuit current limiter has advantages such as no voltage loss on itself.This paper analyzes the principle of bridge fault current limiter.Then combines the features of mine power system,this paper gives a new wiring way of bridge fault current limiter which overcome the three-phase bridge fault current limiter must be connected to the transformer secondary side and makes the installation of the position limiting flexibility and makes the fault current limiter suitable for the mine power system. And simulation results show its feasibility. Then analyzed the reasonable install position of the new wiring way fault current limiter in mine power supply system, and to explore the influence on the original relay of mine power system. On this basis, this paper design a fault current limiter control strategy. This strategy is easy and quick. Finally, though calculations, the main components of the project prototype was simply selected and simulation results.