Development of hidden discharge current sensor for overhead transmission line based on composite integral Rogowski coil

Wei, Yi; Hu, Chunchao; Zhang, Yanxu; Zhaobin, Zhong; Tao, Chen; Yongqiang, Zhao

doi:10.1109/ceect55960.2022.10030721

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2023

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“…This work places particular emphasis on RC current sensors, one of the most prominent types of LPCTs. RCs have increasingly supplanted traditional current transformers in various applications, including power system current measurement for protective relaying [4,5], fault location detection [6,7], and capturing fast transients [8].…”

Section: Introductionmentioning

confidence: 99%

Testing Rogowski Coils with Merging Units for Smart Grids

Daboul,

Orságová,

Jurák

et al. 2023

Energies

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As smart grids incorporate renewable energy sources and advanced power electronics, ensuring accurate measurement systems becomes paramount due to the increased complexity and potential sources of disturbances. This article focuses on the laboratory calibration of Rogowski coils (RCs) and merging units (MUs), which are fundamental for measuring, controlling, and monitoring digital power systems. A comprehensive digital calibration system is introduced, utilizing precise, commercially available components such as a fluxgate current transducer and a National Instrument. The system assesses magnitude and phase displacement errors under various operating conditions, including abnormal scenarios. Additionally, the impact of uncertainty sources on the measurement chain analysis is discussed, with test results conforming to established standards. This research contributes to enhancing the accuracy and reliability of measurement systems in the context of evolving smart grids.

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