With the rapid development of DC power grids, protection grids is particularly important. Therefore, this paper proposes a kind fault current-limiter with instantaneous by-pass current-limiting reactance, analyses its working principle and theoretical calculations, verifies correctness through simulation experiments. At same time, experimental results show that proposed in can not only instanta...

DC fault clearance is one of the critical issues for modular-multilevel-converter-based high voltage direct current (MMC-HVDC) systems. Employing a hybrid circuit breaker (H-DCCB) to isolate faulty line typical method achieve fast clearance. However, H-DCCB has interrupt and absorb energy up tens megawatts in several milliseconds. Through theoretical analysis interruption process using H-DCCB, ...

The authors deal with design and analysis of an air-core electromagnetic fault current limiter (FCL) rotary motion. proposed device is characterised by a simple structure, fast operating speed reversible operation. It consists two movable concentric air core spherical reactor rings (i.e. inner outer rings) variable mutual angular displacement. At normal condition, reactors are approximately ali...