Protection Scheme based on IoT in Loop Distribution System

Seo, Hun-Chul

doi:10.5370/kiee.2020.69.6.752

Cited by 1 publication

(18 citation statements)

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“…Therefore, because the fault current is injected from several directions, the conventional protection scheme designed for the radial distribution system cannot be applied. The considerations for protection in loop distribution systems with DG are as follows [1][2][3].…”

Section: Considerations For Protection In Loop Distribution System Wi...mentioning

confidence: 99%

“…In open-loop distribution systems, a protection relay can mal-operate due to the tie switch operation. Meanwhile, in closed-loop distribution systems, the protection relay can mal-operate due to bidirectional current flow [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…Various works have been studied on the issues concerning the protection of loop distribution systems. In a previous study [1], a method was proposed to classify fault circuits and open the tie switch to solve the protection problems in the closed-loop system. In another work [2], a method was proposed to classify the normal load current and the fault current after closing of the tie switch in an open-loop distribution system using wavelet transformation.…”

Section: Introductionmentioning

confidence: 99%

“…Herein, the issue concerning protection in a closed-loop distribution system with DG is addressed. The DG has not been considered in previous works [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In one study [1], the load after the fault point in the distribution line could experience outage because of the operation of the tie switch, without considering the fault section.…”

Section: Introductionmentioning

confidence: 99%

“…The DG has not been considered in previous works [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]. In one study [1], the load after the fault point in the distribution line could experience outage because of the operation of the tie switch, without considering the fault section. To solve this problem, a protection method in loop distribution systems with DG is proposed.…”

Section: Introductionmentioning

confidence: 99%

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New Protection Scheme in Loop Distribution System with Distributed Generation

Seo¹

2020

Energies

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Loop distribution systems are increasingly used for reasons such as increased distributed generation (DG) and increased demand for a reliable and high-quality power supply. Because the loop distribution system involves bidirectional power flow, the method for protection of the radial distribution system cannot be applied. Therefore, a protection method is proposed herein for loop distribution systems. In this study, the existence of DG is also considered. According to the proposed method, the fault point is estimated on the basis of the equivalent circuit of the distribution system. Then, the fault section is determined and separated from the distribution system. The separation of DG is determined depending on whether the frequency and voltage are maintained within the steady state ranges. The proposed method is modelled and verified using the Electromagnetic Transients Program. Simulations according to the fault location are performed and analyzed. The results show that the method accurately determines the fault section so that normal power can be supplied to the healthy sections in the distribution system.

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Section: Considerations For Protection In Loop Distribution System Wi...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%