Voltage-Free Distance Protection Method for Closed Loop Structures

Biller, Martin; Jaeger, Johann

doi:10.1109/isgteurope.2018.8571850

Cited by 6 publications

(2 citation statements)

References 5 publications

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“…Furthermore, in Pandakov and Hoidalen (2017), a compensation scheme to omit errors due to impedances of faults and infeed currents was suggested. Biller and Jaeger (2018) proposed a voltage-free scheme for distance protection compatible with inter-infeed and closed-loop feeders to protect lines in the microgrids. This scheme was based on negative sequence currents measured at the relay location and remained unaffected by negative sequence current suppressing converter-connected DGs and fault resistances.…”

Section: B Protective Strategy-based Schemesmentioning

confidence: 99%

A protection scheme based on impedance for LV and MV lines in microgrids with high-impedance fault detection capability

Nobakhti

Ketabi

2023

Front. Energy Res.

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Microgrid properties including bidirectional power flow in feeders, fault level decrease in the islanded mode, and intermittent nature of distributed generators (DGs) result in the malfunctioning of microgrid conventional protection schemes. In the present article, a protection scheme based on impedance is suggested for fault detection in LV and MV overhead and cable distribution lines in both grid-connected and islanded modes. To determine a fault detection index, new suggested equivalent circuits for doubly fed lines are applied. Relay location data and magnitude of positive sequence voltage of the other end of the line are used. It is simulated by PSCAD and MATLAB software in order to evaluate its performance and approve its validity. This scheme can detect even high-impedance faults in both grid connected and islanded modes in LV and MV overhead and cable distribution lines. In addition, it is robust against load and generation uncertainty and network reconfigurations. Low sampling rate and minimum data exchange are among the advantages of the proposed scheme.

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Section: B Protective Strategy-based Schemesmentioning

confidence: 99%

A protection scheme based on impedance for LV and MV lines in microgrids with high-impedance fault detection capability

Nobakhti

Ketabi

2023

Front. Energy Res.

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“…Moreover, reference [28] proposed a compensation scheme to eliminate errors caused by faults impedances and infeed currents. In [29], a voltage-free distance protection scheme compatible with closed-loop structures and inter infeed was suggested. It was based on measuring negative-sequence currents at relay location and unaffected by negative-sequence current suppressing converter-connected DGs and fault resistances.…”

Section: Protective Strategy-based Schemesmentioning

confidence: 99%

A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids

2021

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Microgrids active characteristics such as grid-connected or islanded operation mode, the distributed generators with an intermittent nature, and bidirectional power flow in active distribution lines lead to malfunction of traditional protection schemes. In this article, an impedance-based fault detection scheme is proposed as the main protection of microgrids by applying the proposed equivalent circuits for doubly-fed lines. In this scheme, relay location data and positive sequence voltage absolute value of the other end of the line are used. It can detect even high impedance faults in grid-connected and islanded modes. It is robust against load and generation uncertainties and network reconfigurations. Low sampling rate and minimum data exchange are among the advantages of the proposed scheme. Moreover, a backup protection scheme based on the conductance variations is suggested. No requirement for the communication link is a distinguished advantage of the proposed backup protection scheme. The proposed schemes have been simulated using PSCAD and MATLAB software and the results confirmed their validity.

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Secure and dependable protection relay behaviour in extremely high loaded transmission systems

Schindler¹,

Prommetta²,

Jaeger³

2020

15th International Conference on Developments in Power System Protection (DPSP 2020)

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Voltage-Free Distance Protection Method for Closed Loop Structures

Cited by 6 publications

References 5 publications

A protection scheme based on impedance for LV and MV lines in microgrids with high-impedance fault detection capability

A protection scheme based on impedance for LV and MV lines in microgrids with high-impedance fault detection capability

A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids

Secure and dependable protection relay behaviour in extremely high loaded transmission systems

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