Analysis of Cable Screen Currents for Diagnostics Purposes

Łowczowski, Krzysztof; Nadolny, Zbigniew; Olejnik, Bartosz

doi:10.3390/en12071348

Cited by 8 publications

(14 citation statements)

References 24 publications

(26 reference statements)

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“…3 The estimated location in case of an earth fault in distribution network is 1/3 of the protected feeder. 4 Detailed description in the following sections of the paper. 5 From technical point of view earth fault current indicators can be adopted to any complex feeder.…”

Section: Methods Of Fault Localizationmentioning

confidence: 99%

“…It is possible to assess earthing system resistance using weather station data or humidity sensors installed in the distribution system network. [4,5]. Sources marked with red-blue and light blue are presented in the next paragraphs.…”

Section: Simulation Testsmentioning

confidence: 99%

“…Figure 5 presents earthing current sources. The current sources marked with yellow, grey, red and green are presented in the previous author's publications [4,5]. Sources marked with red-blue and light blue are presented in the next paragraphs.…”

Section: Simulation Testsmentioning

confidence: 99%

“…The paper focuses on the utilization of cable screen currents of MV power cables. In previous papers, a few functionalities were proposed-utilization of cable screen currents for identification of cable screen erroneous connection and for identification of earth faults in cable lines [4,5]. Moreover, proof of concept regarding the identification of line affected by phase to ground fault was presented.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Łowczowski

Lorenc

Zawodniak³

et al. 2020

Energies

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The paper analyzes the utilization of cable screen currents for earth fault identification and location. Attention is paid on cable and mixed feeders—cable and overhead lines. The principle of operation is based on utilization of 3 criterion values: Ratio of cable screen earthing current and zero sequence cable core current—RF110/15, phase shift between cable screen earthing current and zero sequence cable core current—α and cable screen admittance defined as a ratio of cable screen earthing current and zero sequence voltage—Y0cs. Earth fault location is possible thanks to discovered relation between RF110/15 and α, whereas Y0cs allows for reliable detection of earth faults. Detection and identification are very important because it allows to increase the reliability of supply—reduce downtime and number of consumers affected by the fault. The article presents a phase to ground fault current flow for different power system configurations. At the end solution, which improves location capabilities is proposed. The solution is analyzed in PSCAD software and verified by network experiment.

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Section: Methods Of Fault Localizationmentioning

confidence: 99%

Section: Simulation Testsmentioning

confidence: 99%

Section: Simulation Testsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Łowczowski

Lorenc

Zawodniak³

et al. 2020

Energies

Self Cite

View full text Add to dashboard Cite

show abstract

“…Methods mostly used to reduce transmission losses in HV cable screens transferred to the ground of the MV network may be connected with the occurrence of an electric shock, overvoltage hazard or obstructing the operation of such networks as difficulties in detecting cable line damage [14]. The primary reason for this is the differences in the construction of HV and MV networks, among other differences in neutral point grounding.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen

Schött-Szymczak

Walczak

2020

Energies

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Changing the connection type of a medium voltage (MV) cable screen is linked to a decrease in power loss, although it may also lead to the generation of overvoltage in a metallic cable screen, which is hazardous for proper cable line work. In this paper, results of simulation and field researches are presented, showing the range of voltages that occurs in cable screens during single-phase ground fault. There are considered to be three scenarios according to the applied type of cable screen connection. Conducted researches allow the comparison of chosen methods of simulation with an actual outcome. Results obtained during simulation and field studies lead to the conclusion that the range of overvoltage occurred in a cable screen could in fact be dangerous for the cable line's sheath insulation without proper overvoltage protection.

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Assembly Automation Technology of the Stand Type Transformer Using Power System Gripper Cable

Pan

Yang

et al. 2021

IOP Conf. Ser.: Earth Environ. Sci.

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The cold crimping process of the lead wire of the vertical transformer of the clamp cable is a commonly used manufacturing method in the current transformer manufacturing process. Its advantages are: clean, simple, reliable, and convenient, which satisfies the manufacturing needs of high-voltage electrical products. However, due to the diversity of the lead cross-sectional area, in actual operation, it is often necessary to fill between the lead and the terminal, and there are many optional specifications for the filling line, which may easily lead to inconsistent filling methods and unclear filling standards. Aiming at a kind of vertical transformer primary winding structure and primary cable lead assembly automation research. The improved cold crimping of the lead includes two parts: the tightening and rounding of the lead and the filling of the lead copper tube as the preparatory process before the cold crimping. The post-assembly paper uses machine learning algorithms to simulate and model the wiring reliability of the connected vertical transformer, and evaluate its assembly automation level. The research results found that the wiring method proposed in the paper can improve the reliability of the wiring and the assembly efficiency is higher.

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Analysis of Cable Screen Currents for Diagnostics Purposes

Cited by 8 publications

References 24 publications

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Detection and Location of Earth Fault in MV Feeders Using Screen Earthing Current Measurements

Analysis of Overvoltages Appearing in One-Sidedly Ungrounded MV Power Cable Screen

Assembly Automation Technology of the Stand Type Transformer Using Power System Gripper Cable

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