The Doubly Fed Induction Generator (DFIG) is getting wider popularity due to its ability to adapt with variable wind speed and to capture more wind energy. Though DFIG has a salient feature of the fault ride through capability, this is not sufficient to preserve the necessity of the grid code when the DFIG system is connected with the grid. To accomplish this goal, a DC resistive superconductin...

Different types of fault current limiters (FCLs) have been developed and designed based on non-superconducting DC reactors (NSDRs). This paper proposes a controllable dual-bridge FCL (CDBFCL) the NSDR for use in an AC-type micro-grid. It includes two series shunt bridge circuits. The is diode semiconductor switches coupled with line via transformer. thyristor parallel line. provides variable vo...

A sending-end AC fault may lead to commutation failure (CF) in a line-commutated converter high-voltage direct current (LCC-HVDC) system. In this paper, theoretical analysis of the impact mechanisms CF and its recovery speed on transient stability power system (TSSPS) is performed. Firstly, models DC are established; ramp function utilized characterize process. Secondly, swing direction relativ...

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