Protection Scheme of a 154-kV SFCL Test Transmission Line at the KEPCO Power Testing Center

Lee, Seung Ryul; Lee, Jongjoo; Yoon, Jae-Young; Kang, Yoen-Woog; Hur, Jin

doi:10.1109/tasc.2017.2669159

Cited by 24 publications

(18 citation statements)

References 4 publications

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“…The setting changeover time for existing relays is in the range of 5–6 cycles [4, 18]. Generally, the GS changeovers are not allowed in fault conditions for safety reasons [19].…”

Section: Implementation Proposalmentioning

confidence: 99%

“…Owing to the meshed nature of the system, the network under study has situations, in which the SCFCL activates but the relay does not require setting changeover. Changing the settings for these cases solely based on the status of SCFCL, as discussed in [3, 4], may lead to malfunction of the relays. The solutions discussed in [8] will also lead to malfunction of relays.…”

Section: Introductionmentioning

confidence: 99%

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Line distance protection in the presence of SCFCL

Thute¹,

Bahirat²,

Khaparde³

et al. 2019

IET Generation Trans & Dist

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There is an increase in fault current levels seen by utilities due to grid expansion and the addition of new resources. Installation of superconducting fault current limiter (SCFCL) at transmission voltage levels is being explored to reduce the fault levels. The SCFCL limits the fault current by inserting an additional impedance in the network, which may impact the protection system. This paper discusses the impacts of SCFCL on the operation of line distance protection. It is observed that operation of SCFCL may not impact all the distance relays in the substation and near-by substation in the same way, thus a boundary definition method is proposed in this study to identify the affected relays. The definitions of boundary condition based on steadystate fault current values and critical current of the SCFCL are proposed in this study. The impact of SCFCL on the line distance relays which manifest as underreaching of the relays and may also lead to coordination issues and erroneous operation. An implementation method for mitigation which is compatible with existing substation relays is proposed and demonstrated to ensure proper operation of the relays. The proposed mitigation ensures that the system integrity is maintained during faults.

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“…The setting changeover time for existing relays is in the range of 5–6 cycles [4, 18]. Generally, the GS changeovers are not allowed in fault conditions for safety reasons [19].…”

Section: Implementation Proposalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Line distance protection in the presence of SCFCL

Thute¹,

Bahirat²,

Khaparde³

et al. 2019

IET Generation Trans & Dist

View full text Add to dashboard Cite

show abstract

“…In the attempts to address this topic, a few detailed studies have been conducted until now [13,19,20]. In [13], not only the authors have surveyed the impact of SISFCL on the conventional distance relay, but also a remedial action about mitigation of the adverse effect of SISFCL on distance relay performance has been proposed.…”

Section: Introductionmentioning

confidence: 99%

Studying a novel method for mitigation of the adverse impacts of SFCL on transmission line distance protection

Barzegar-Bafrooei

Foroud

2019

IET Generation, Transmission & Distribution

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“…HSFCL, which circuit breaker is applied to its structure, can be used for both transmission and distribution (T&D) systems, and successful demonstration prototypes have been technically verified at 22.9, 24, and 110 kV . Currently, studies to develop this type of SFCL at 154 kV are being performed . The working concept of HSFCL is as similar as other FCLs, but it brings the following benefits: HSFCL limits the fault current with little delay. No iron core and subsequently oil tank is applied to develop HSFCL, so, it is lightweight, compact, and portable. The recovery process of superconducting element is lower than RSFCL. HSFCL can be implemented either with a resistive or inductive element. Because HSFCL is able to limit fault current for long duration, it “buys” more time to interrupt fault current by circuit breaker. It is possible to apply this type of SFCL into the power system with bidirectional fault current, which is a very common case in the power system. …”

Section: Introductionmentioning

confidence: 99%

“…[11][12][13] Currently, studies to develop this type of SFCL at 154 kV are being performed. 14 The working concept of HSFCL is as similar as other FCLs, but it brings the following benefits:…”

Section: Introductionmentioning

confidence: 99%

Impact of fault resistance and fault distance on fault current reduction ratio of hybrid SFCL

Barzegar-Bafrooei

Foroud

2017

Int Trans Electr Energ Syst

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Summary Superconducting fault current limiters (SFCLs), as the novel power system devices, have attracted attentions in the last years. However, in order to achieve the maximum benefit from SFCLs, their interaction with power system should be comprehensively evaluated before equipping the power system with them. This paper investigates the effect of fault resistance and fault distance on the steady‐state fault current reduction ratio (FCRR) of hybrid SFCL. Based on the equivalent circuit model, analytical studies are presented to obtain the relation between 2 abovementioned factors and the FCRR of hybrid SFCL. Then, through the detailed simulation studies, the current limiting behavior of hybrid SFCL is evaluated when the value of fault resistance and the position of fault change in wide range. As a result, although the hybrid SFCL is able to reduce the fault current under different circumstances; however, FCRR significantly varies under outside the control changing circumstances. For far faults and faults with high fault resistance, the FCRR of hybrid SFCL is not as good as the other fault conditions. Hence, in the last section of the paper, the remedial actions to enhance the performance of hybrid SFCL during these conditions are proposed.

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Protection Scheme of a 154-kV SFCL Test Transmission Line at the KEPCO Power Testing Center

Cited by 24 publications

References 4 publications

Line distance protection in the presence of SCFCL

Line distance protection in the presence of SCFCL

Studying a novel method for mitigation of the adverse impacts of SFCL on transmission line distance protection

Impact of fault resistance and fault distance on fault current reduction ratio of hybrid SFCL

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