Estimation Method of Disconnection Point Using Common Earthing Conductor for Distribution Line with Branch Line

Kodama, Yasuhiro; Hayashi, Yasuhiro; Nishida, Yusuke

doi:10.1541/ieejpes.142.34

Cited by 2 publications

(9 citation statements)

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“…If a ground fault and disconnection occurred on the distribution lines shown in Fig. 4, we proposed a method to estimate the disconnection point based on the time difference between the zero‐crossing point of the disconnection current flowing in the current measuring device installed at the beginning edge of the fault detection line of the distribution line and the beginning edge of the fault detection line of the adjacent distribution line [3,4]. In Fig.…”

Section: Short‐circuit Point Detectionmentioning

confidence: 99%

“…We are currently working on the identification of the failure points that cause power supply disruptions and have proposed a method for estimating the ground‐fault [2] and disconnection points [3,4] by installing an abnormal detection line under the high‐voltage line of the distribution line. The method of estimating the ground‐ fault point using the abnormal detection line is that a ground fault with a ground fault resistance value of 50 Ω or more occurs in a system in which the ends of the abnormal detection lines are connected in two adjacent distribution lines.…”

Section: Introductionmentioning

confidence: 99%

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Short‐Circuit Point Estimation Method Using Abnormal Detection Line of Distribution Line

Kodama

Hayashi

2022

IEEJ Transactions Elec Engng

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Short‐circuit accidents hinder the supply of electric power in distribution lines. If a short‐circuit occurs, the power supply is interrupted and can be resumed only after the short‐circuit point is repaired. Identifying the short‐circuit point is time consuming because it is necessary to confirm whether the overcurrent passage indicator is operating and visually confirm the short‐circuit point. Therefore, we propose a method of installing an abnormal detection line under the high‐voltage line and identifying the short‐circuit point based on the current ratio before and after the short‐circuit flowing to the current‐measuring devices installed at both ends of the abnormal detection line. Because the current flowing in a high‐voltage distribution line at the time of the short‐circuit depends on the short‐circuit resistance value, the range of application of the short‐circuit resistance value is also discussed. We show that the method using abnormal‐detection lines can be applied to estimate the high‐resistance ground faults and disconnection points, and the ability to estimate short‐circuit points leads to the efficient use of the method using abnormal detection lines. © 2022 Institute of Electrical Engineers of Japan. Published by Wiley Periodicals LLC.

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Section: Short‐circuit Point Detectionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short‐Circuit Point Estimation Method Using Abnormal Detection Line of Distribution Line

Kodama

Hayashi

2022

IEEJ Transactions Elec Engng

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“…Various DP estimation methods have been reported using smart meters [8], artificial intelligence (AI) [9], and common earthing conductors [10], [11]. Moreover, extensive studies have been conducted to determine the voltage characteristics of the measuring equipment installed on a distribution line [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

“…Current DP estimation methods focus on the trunk and branch lines of the distribution system [10], [11]. Ammeters are mounted at the starting point of a common earthing conductor installed on two adjacent distribution lines, and the DP is estimated by detecting the change in the phase of the current flowing through the ammeters at the time of disconnection.…”

Section: Introductionmentioning

confidence: 99%

“…In this method, two adjacent distribution lines are considered in residential and urban areas. Unlike the method described in [10], [11], the DP must be identified within a narrow region using information from ammeters installed at the starting and end points of the common earthing conductor in rural areas. Therefore, there is a need for further improvement and validation of this method to apply it to distribution lines in rural areas.…”

Section: Introductionmentioning

confidence: 99%

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Abnormal Detection Line Method to Estimate Disconnection Points in Power Distribution Lines

Kodama

Hayashi

2023

IEEE Trans. Power Delivery

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Natural phenomena such as gale, rain, and lightning cause disconnections, which can disrupt power distribution. Therefore, a method that can estimate the disconnection point (DP) in power distribution lines is needed to ensure public safety and a stable power supply. A simple DP detection method using a common earthing conductor is applied to both residential and industrial areas with only two distribution lines with interconnection points at the ends. However, this method cannot be used in rural areas that have distribution lines without interconnection points. Therefore, we propose a novel DP estimation method for use in distribution lines in rural areas. To this end, an abnormal detection line was installed along a long distribution line with branch lines and ammeters placed at its starting and end points. DP estimation was realized by calculating the time difference between the zero-crossing points of the current flowing in the two ammeters. The DP estimation effectiveness of the proposed method was validated by simulating long distribution lines. Thus, the proposed method can be used to improve the performance of the distribution lines in rural areas.

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Estimation Method of Disconnection Point Using Common Earthing Conductor for Distribution Line with Branch Line

Cited by 2 publications

References 1 publication

Short‐Circuit Point Estimation Method Using Abnormal Detection Line of Distribution Line

Short‐Circuit Point Estimation Method Using Abnormal Detection Line of Distribution Line

Abnormal Detection Line Method to Estimate Disconnection Points in Power Distribution Lines

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