Magnetic flux constraint three-phase fault current limiter

The invention discloses a magnetic flux constraint three-phase fault current limiter, and belongs to the technical field of electrical engineering. The magnetic flux constraint three-phase fault current limiter comprises a fault current limiter body. The fault current limiter is a transformer core which is equipped with a three-phase coupled winding, the coupled windings of all phases are wound on the transformer core in the same direction, and the coupled winding of each phase is connected to one phase of a three-phase line. The magnetic flux constraint three-phase fault current limiter has no effect on the transmission power and line current of a system when the system is in a normal state, and can quickly and effectively inhibit the increase of current of a fault phase when a single-phase grounding fault occurs. The magnetic flux constraint three-phase fault current limiter is low in overall loss (mainly copper loss), and is high in response speed. Compared with a conventional fault current limiter, the fault current limiter of the invention can respond to fault current at the moment of fault in a timely manner based on the magnetic flux constraint mechanism, the response time is short, and the response to fault current is quick.