A Novel Online Monitoring Scheme for Underground Power Cable Insulation Based on Common-Mode Leakage Current Measurement

Wu, Yang; Zhang, Pinjia

doi:10.1109/tie.2022.3142434

Cited by 17 publications

(5 citation statements)

References 30 publications

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“…By comparison, traditional coaxial cables lack these filtering capabilities, making the filter cable with DCTS a viable choice for addressing electromagnetic compatibility (EMC) concerns. lectrical cables 1 , as current-carrying conductors, act as the coupling path of undesirable electromagnetic interference (EMI) 2 , which can potentially impact the proper operation of electronic devices. According to the basic framework of any electromagnetic compatibility (EMC) design 3 , electrical cables not only conduct electromagnetic interference (EMI), leading to symptoms of conducted emissions (CE) and conducted susceptibility (CS) 4,5 , but also radiate electromagnetic energy 6 , causing issues with radiated emissions (RE) and radiated susceptibility (RS) 7,8 .…”

Section: Filter Cable Design With Defected Conductor Transmission Str...mentioning

confidence: 99%

Filter cable design with defected conductor transmission structures

Yunan,

Jiang,

Xiong

et al. 2024

Preprint

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This article introduces a filter cable design featuring an insulated cylinder that has been coated using a defected conductor transmission structure (DCTS). This unique feature enables the cable to possess distributed filter advantages throughout its length. The DCTS, featuring a well-designed etched pattern, serves as a boundary condition for transmitting specific frequency electromagnetic waves and effectively performs the same filtering function as a lumped filter circuit. To validate this concept, a lowpass filter cable is proposed, which incorporates six-slot-ring defected structures. The cable utilizes polytetrafluoroethylene (PTFE) as the inner dielectric, encased within a flexible printed circuit board (FPCB)-manufactured DCTS. With precise dimensions of a 2.4 mm diameter and a 340 mm length, the proposed filter cable demonstrates performance, indicated by a minimal insertion loss of under 0.38 dB below 6 GHz in the passband, and a rejection surpassing 43 dB at 7.7-25 GHz in the stopband. By comparison, traditional coaxial cables lack these filtering capabilities, making the filter cable with DCTS a viable choice for addressing electromagnetic compatibility (EMC) concerns.

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Section: Filter Cable Design With Defected Conductor Transmission Str...mentioning

confidence: 99%

Filter cable design with defected conductor transmission structures

Yunan,

Jiang,

Xiong

et al. 2024

Preprint

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“…But the point is in the estimation method of insulation resistance. Some methods for testing and estimating insulation resistance have been reviewed in the literature [39,48].…”

Section: Leakage Currentmentioning

confidence: 99%

Grounding and Isolation Requirements in DC Microgrids: Overview and Critical Analysis

Azizi,

Husev,

Veligorskyi

et al. 2023

Energies

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DC microgrids, along with existing AC grids, are a future trend in energy distribution systems. At the same time, many related issues are still undefined and unsolved. In particular, uncertainty prevails in isolation requirements between AC grids and novel microgrids as well as in the grounding approaches. This paper presents a critical technical analysis and an overview of possible grounding approaches in DC systems and the feasibility of avoiding isolation between AC and DC grids.

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“…Traditionally, off-line methods such as the study of dielectric response and impedance phase detection were used, but currently various on-line methods have been developed. One of the methods used in [121] uses magnetic sensors to measure the common mode leakage current since the aging of cables is accompanied by an increase in relative permittivity that in turn increases the insulation capacitance and conductance of the cable, thereby increasing the flow of leakage current. Ref.…”

Section: Underground Cablesmentioning

confidence: 99%

Sensor Technologies for Transmission and Distribution Systems: A Review of the Latest Developments

et al. 2022

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The transmission and distribution systems are essential in facilitating power flow from the source multiple loads over large distances with high magnitudes of voltages and currents. Hence, the monitoring and control of various components of these structures are crucial. Traditionally, this was implemented by sensing only the grid current and grid voltage parameters through coils, clamps, or instrument transformers. However, these have bulky structures that restrict them to the substation and have installation and maintenance issues due to their direct contact with high voltage conductors. Currently, the power grid is undergoing various developments e.g., penetration of renewable energy sources, remote control, and automation, bidirectional power flow, etc. These developments call for compact and energy-efficient sensors to sense multiple grid parameters such as the magnetic field data, temperature, humidity, acoustics, etc., to enable real time, wide area monitoring and the predictive maintenance of the power grid. The goal of this paper is to summarize the advancements in sensing technologies on transmission and distribution systems over a decade and to explain their role in the forthcoming expansion of the power grids. This paper aims to outline the current state-of-affairs of sensor technology as well as to fill research gaps by exploring their limitations.

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A Novel Online Monitoring Scheme for Underground Power Cable Insulation Based on Common-Mode Leakage Current Measurement

Cited by 17 publications

References 30 publications

Filter cable design with defected conductor transmission structures

Filter cable design with defected conductor transmission structures

Grounding and Isolation Requirements in DC Microgrids: Overview and Critical Analysis

Sensor Technologies for Transmission and Distribution Systems: A Review of the Latest Developments

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