A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids
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 dete...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-01-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/14/2/274 |
| _version_ | 1797415992754700288 |
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| author | Seyyed Mohammad Nobakhti Abbas Ketabi Miadreza Shafie-khah |
| author_facet | Seyyed Mohammad Nobakhti Abbas Ketabi Miadreza Shafie-khah |
| author_sort | Seyyed Mohammad Nobakhti |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-09T05:57:28Z |
| format | Article |
| id | doaj.art-a14543996c1449e9b7de97916ed16fe2 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-09T05:57:28Z |
| publishDate | 2021-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-a14543996c1449e9b7de97916ed16fe22023-12-03T12:12:38ZengMDPI AGEnergies1996-10732021-01-0114227410.3390/en14020274A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC MicrogridsSeyyed Mohammad Nobakhti0Abbas Ketabi1Miadreza Shafie-khah2Department of Electrical and Computer Engineering, University of Kashan, Kashan 8731753153, IranDepartment of Electrical and Computer Engineering, University of Kashan, Kashan 8731753153, IranSchool of Technology and Innovations, University of Vaasa, 65200 Vaasa, FinlandMicrogrids 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.https://www.mdpi.com/1996-1073/14/2/274backup protectiondistributed generationdistribution networkfault detectionimpedance-based protectionmain protection |
| spellingShingle | Seyyed Mohammad Nobakhti Abbas Ketabi Miadreza Shafie-khah A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids Energies backup protection distributed generation distribution network fault detection impedance-based protection main protection |
| title | A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids |
| title_full | A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids |
| title_fullStr | A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids |
| title_full_unstemmed | A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids |
| title_short | A New Impedance-Based Main and Backup Protection Scheme for Active Distribution Lines in AC Microgrids |
| title_sort | new impedance based main and backup protection scheme for active distribution lines in ac microgrids |
| topic | backup protection distributed generation distribution network fault detection impedance-based protection main protection |
| url | https://www.mdpi.com/1996-1073/14/2/274 |
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