Design of fault current limiter using core with low initial permeability

Guney, Onur; Cansız, Ahmet

doi:10.1049/iet-gtd.2016.2147

Cited by 3 publications

(2 citation statements)

References 13 publications

(7 reference statements)

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“…There are two ways to deal with this challenge. The first scheme is to install fault current limiters in the power system to limit the amplitude of short-circuit current, and interrupt the shortcircuit current by the existing circuit breaker [2][3][4][5]. Another way is to develop novel transmission voltage level CBs with high current breaking capacity.…”

Section: Introductionmentioning

confidence: 99%

Design and short‐circuit current breaking test verification of a 72.5 kV single‐break fast vacuum circuit breaker

Guan

Yao

Chen

et al. 2022

IET Generation Trans & Dist

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Fast clearing of a short‐circuit fault is vital to increase the transmission capacity of power grid transmission lines and improve the transient stability of a power system. A fast vacuum circuit breaker (FVCB) is a good candidate to realize quick elimination of a short‐circuit fault. The original contribution of this paper is to present the design of a 72.5 kV single‐break FVCB and its verification of short‐circuit breaking performance. A specially designed 72.5 kV vacuum interrupter, with floating shields and reduced mass of moving components, was developed. An electromagnetic repulsion actuator was used to provide a high initial opening speed, V1, of 5 m/s over half of the full‐contact gap and a relatively low average opening speed, V2, of 1.59 m/s in the full contact gap of 30 mm. The high‐designed V1 and low‐designed V2 were achieved with the aid of a deliberately designed oil buffer. The opening and closing time of the designed 72.5 kV FVCB was 1.2 ± 0.04 ms and 18 ± 0.20 ms respectively. The terminal fault test duty of T100s(b), carried out on the 72.5 kV FVCB, demonstrated both the 40 kArms and 80 kArms short‐circuit current breaking performance. The short‐circuit current breaking arcing time windows of FVCB, including the minimum arcing time, the maximum arcing time, and the middle arcing time, was verified to fulfill the requirement of the international standard, IEC 62271‐100 2017, and the Chinese standard, GB/T 1984–2014, both for the 40 kArms and 80 kArms switching cases, respectively. Further development of the 72.5 kV single‐break FVCB would benefit the development of ultra‐ or extra‐high voltage FVCBs by reducing essential numbers of series‐connected breaking units.

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Section: Introductionmentioning

confidence: 99%

Design and short‐circuit current breaking test verification of a 72.5 kV single‐break fast vacuum circuit breaker

Guan

Yao

Chen

et al. 2022

IET Generation Trans & Dist

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“…Generally, FCLs can be classified based on the involved constructive technology into solid-sate [8,9] quench-type superconducting [10] and presaturated core FCLs (PCFCLs) [11]. Solid-sate FCLs rely on the application of power semiconductor switches in accordance with an external control circuit for fault detection and clearing.…”

Section: Introductionmentioning

confidence: 99%

Compact designs of permanent‐magnet biased fault current limiters

Eladawy

Metwally

2020

IET Electric Power Applications

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This study proposes two novel compact designs of three-phase permanent-magnet biased fault current limiters (PMFCLs), namely, delta-shaped and compact cross delta PMFCLs. The actual representation of neodymium permanent magnet (PM) is based on the Jiles-Atherton modelling for the demagnetisation behaviour in the second quadrant of its actual non-linear B-H hysteresis loop. This PM is a preliminary representation validated through experimental measurements to ensure the trends and behaviour of PMFCL during its entire pre-fault, fault and post-fault recovery durations. Comprehensive time-domain, electromagnetic finite-element simulations, through COMSOL multiphysics package, have been conducted to study the relative effect of the constructive controlling parameters on the general performance of these proposed PMFCLs. However, the general performance of PMFCL can be characterised through the voltage drop and power losses of normal operation, and the fault current clipping ratio during the fault condition. Results reveal that the compact cross delta design has superior performance and enhanced capability of limiting any type of fault current, either symmetrical or unsymmetrical, with leading advantages of significant reduction of the voltage drop across PMFCL and power losses during the normal operation of the grid.

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