Research and Application of On-line Monitoring Device for Dry-type Air-core Reactor

Zhu, Youwen; Xue, Zhipeng; Zhou, Yang; Hu, Jie; Liu, Junjun; Li, Zhiwen

doi:10.1109/edssc.2019.8754459

Cited by 3 publications

(2 citation statements)

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“…Ref. [23] introduced an online device for monitoring reactor short-circuit faults based on the power angle. In the realm of techniques employing electrical parameters, many simulations and experiments focus on scenarios where one or a few turns of the reactor coil are entirely shorted.…”

Section: Introductionmentioning

confidence: 99%

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A Detection Method for Slight Inter-Turn Short-Circuit Fault in Dry-Type Air-Core Shunt Reactors

Wu,

Zhen,

Chang

et al. 2024

Energies

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Dry-type air-core shunt reactors are integral components in power transmission and distribution networks, designed to control reactive power and enhance system stability. However, inter-turn short-circuit faults (ISCFs) are common occurrences in shunt reactors, which are caused by various factors, including manufacturing defects, insulation degradation, or operational stresses. At the early stage of the ISCFs, the current does not reach a sufficient level to activate the protective equipment. These faults may lead to serious consequences, such as overheating, insulation breakdown, and even catastrophic failures, posing risks to the entire power system. Therefore, developing an effective and reliable detection method for ISCFs at the early stage is paramount. In this paper, a new method named the fault detection factor (FDF) based on equivalent resistance is presented to detect the slight ISCFs in dry-type air-core shunt reactors considering insulation resistance. In addition, the effect of noise signal existence in the monitoring process is taken into account. A moving average filter is adopted to guarantee both the sensitivity and the reliability of the proposed method. Ultimately, the simulation results of the FDF under different conditions are presented, which show the effectiveness and potential of the proposed method in observing and monitoring slight ISCFs.

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Section: Introductionmentioning

confidence: 99%

“…It can be seen that the sensitivity of the FDF to the local ISCF can be improved by increasing the value of a. Ref. [23] proposed a method to detect ISCFs using the power angle. When the insulation resistance 𝑅 𝑓 = 60 Ω , the power angle of the investigated reactor is 1.5687 rad, while the power angle is 1.5688 rad when the reactor works normally.…”

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confidence: 99%