改进的双桥混合式桥路型高温超导故障限流器

针对现有断路器开断容量不能满足超高压系统故障短路电流要求的现状,介绍了两种单相桥型高温超导限流器的基本工作原理;针对整流桥中直流偏压的引入问题,提出了一种改进的双桥混合式桥路型高温超导故障限流器,深入讨论了新型限流器的工作原理,限流器的参数变化对其限流特性的影响,包括临界电流、动作电流和超导线圈电感.仿真与实验表明该类型限流器具有良好的限流作用,从工程的角度解决了直流偏压引入困难的问题.

An Improved Double-Bridge Mixed Rectifier Type High Temperature Superconducting Fault Current Limiter

The breaking capacity of existing breakers can not satisfy the requirements of fault short current in ultra-high voltage power transmission system. In this paper, the basic theory of two single phase rectifier type high temperature superconducting fault current limiters is introduced. An improved double-bridge rectifier type high temperature superconducting fault current limiter is presented aiming at DC bias power supply of rectifier bridge. The operating theory of improved fault current limiter is discussed deeply. The effect of parameter variety of improved fault current limiter is analyzed for limiting fault current characteristic of fault current limiter, including critical current, action current and superconducting coil inductance. The better effect of limiting fault current of improved fault current limiter is verified by simulation and experiment. The problem of DC bias power supply is solved in engineering.