Analysis of a Switched Impedance Transformer-Type Nonsuperconducting Fault Current Limiter

Abstract

This paper proposes a nonsuperconducting fault current limiter (NSFCL) topology and control strategy. The switched impedance transformer-type NSFCL topology is optimized to protect against short transients and to work in conjunction with other fuses or circuit breakers, hence has the merits of being simple, low cost, and compact. A prototype has been designed and built for a three-phase 600-V R M S ,L −L system. It has been tested in a ULcertified high-power test lab with 5-A normal current and 100-kA potential fault current.Index Terms-Bridge rectifier, fault current limiters (FCLs), high-power faults.

Controllable DC‐link fault current limiter augmentation with DC chopper to improve fault ride‐through of DFIG

“…However, the external DC source to obtain V c can be provided from the power lines, using an isolation transformer and three‐phase diode bridge rectifier [25]. Alternatively, a DC–DC converter can be employed to control the output DC voltage level during all load conditions [36, 37].…”

Studies on switching transients and calculations of physical fields in power capacitors

“…In Hadi et al and Zhang,6 methods to restrain capacitor switching transients by using a series current limiting reactors were presented. In Chen et al and Tseng, synchronous closing schemes were presented, and the breaker controls were used in those schemes to synchronize the actual closing of contacts with the corresponding voltage zeros of the power‐frequency waves. In Bhargava et al and Das, preinsertion resistor/inductor was adopted to restrain switching transients of capacitor.…”

Thyristor based bridge‐type fault current limiter for fault current limiting capability enhancement

“…In recent decades, utilisation of Fault Current Limiters (FCLs) has been one of the most popular techniques for limitation of fault current in power systems [6]. Many different types of FCL have been proposed in literature and some new structures are also being presented every year [7–19]. Although some FCL types such as superconductor are commercialised [7], the FCLs need more investigations in order to find their real position in power systems.…”

“…The proposed QBT‐FCL does not have any remarkable impact on the system in steady state condition and has suitable recovery time interval. A thyristor based bridge‐type fault current limiter (TBFCL) that utilises a three‐phase coupling transformer combined with a DC reactor is proposed in [19]. One of the most common defects of the non‐superconductive BFCLs refers to the DC reactor internal resistance, which results in significant losses [20].…”