Behavior of vacuum interrupters during switching operations with a high rate of rise of recovery voltage (RRRV)

Taylor, E.; Venna, Karthik Reddy; Gentsch, D.; Lawall, A.; Wethekam, S.

doi:10.1109/isdeiv46977.2021.9587328

Cited by 2 publications

(1 citation statement)

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“…Generator circuit breakers (GCBs) quickly cut off a generator from the fault source in the event of a short-circuit fault [1][2][3] . Nevertheless, GCBs generate a high transient recovery overvoltage (TRV) after the arc is extinguished during the opening process [4][5][6][7] . To solve this problem, methods involving the parallel connection of capacitors at each GCB end have been extensively adopted to reduce the amplitude coefficient and the increase rate of the TRV [8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Neutral Point Equipment Selection on 26-kV Nuclear Power Plant

Sun

et al. 2023

Preprint

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Large-capacity nuclear power plants are generally equipped with generator circuit breakers (GCBs) and capacitors connected in parallel at each end of the GCB to limit transient recovery voltages. However, an increase in capacitance to ground caused by shunt capacitors can lead to arcing ground overvoltage during single-phase short-circuit faults. This study conducts theoretical calculations and simulations to analyze the effects of reducing the resistance of the secondary side of the neutral grounding transformer and reducing the ratio of the grounding transformer on transient overvoltage limitation during single-phase short-circuit faults. The study also investigates the relationship between the size of the shunt capacitor at each end of the GCB and the single-phase short-circuit voltage and current to provide a reference for the optimal configuration of generator neutral equipment in practical engineering scenarios.

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