Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage
The wide application of microgrid concept leads to challenges for the traditional protection of distribution networks because of the changes in short circuit level and network topology during the two modes of microgrid operation. This paper proposes a promising solution for these problems by offerin...
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2021
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oai:doaj.org-article:86b1549a3d9b47fba9e918f99c7e5ef12021-12-01T00:00:34ZRobust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage2169-353610.1109/ACCESS.2021.3128999https://doaj.org/article/86b1549a3d9b47fba9e918f99c7e5ef12021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9618920/https://doaj.org/toc/2169-3536The wide application of microgrid concept leads to challenges for the traditional protection of distribution networks because of the changes in short circuit level and network topology during the two modes of microgrid operation. This paper proposes a promising solution for these problems by offering a new protection coordination scheme not affected by the variation of short circuit level or the changes in network topology. The proposed protection scheme is based on local measurements at relay location with low sampling frequency by computing the rate of change of fundamental voltage (<italic>ROCOV</italic>) to detect different fault types, identify the faulty zone accurately and guarantee robust coordination between primary and backup relays. The proposed coordination scheme can be achieved by optimizing either two settings for relay characteristic (time dial setting and pickup value) or four settings (time dial setting, pickup and the parameters that control the characteristic shape A & <inline-formula> <tex-math notation="LaTeX">$B$ </tex-math></inline-formula>)). The proposed scheme is extensively tested using MATLAB simulations on the modified IEEE 14 bus meshed network embedded with synchronous/inverter-based distributed generation units under wide variations in operating conditions and short circuit levels for both grid-connected and islanded modes of operation. The achieved results confirm that the proposed coordination scheme can maintain the coordination between primary and backup relays for different fault locations, types and different topologies. It provides selective, reliable, and secured microgrid operation compared with conventional schemes, using fault current limiters and some other techniques discussed in the literature.Mohamed Ahmed DawoudDoaa Khalil IbrahimMahmoud Ibrahim GilanyAboul'Fotouh El'GharablyIEEEarticleCoordination schemedistributed generationlocal measurementsmicrogrid and rate of change of voltage (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ROCOV</italic>)Electrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 156283-156296 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Coordination scheme distributed generation local measurements microgrid and rate of change of voltage (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ROCOV</italic>) Electrical engineering. Electronics. Nuclear engineering TK1-9971 |
| spellingShingle |
Coordination scheme distributed generation local measurements microgrid and rate of change of voltage (<italic xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">ROCOV</italic>) Electrical engineering. Electronics. Nuclear engineering TK1-9971 Mohamed Ahmed Dawoud Doaa Khalil Ibrahim Mahmoud Ibrahim Gilany Aboul'Fotouh El'Gharably Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| description |
The wide application of microgrid concept leads to challenges for the traditional protection of distribution networks because of the changes in short circuit level and network topology during the two modes of microgrid operation. This paper proposes a promising solution for these problems by offering a new protection coordination scheme not affected by the variation of short circuit level or the changes in network topology. The proposed protection scheme is based on local measurements at relay location with low sampling frequency by computing the rate of change of fundamental voltage (<italic>ROCOV</italic>) to detect different fault types, identify the faulty zone accurately and guarantee robust coordination between primary and backup relays. The proposed coordination scheme can be achieved by optimizing either two settings for relay characteristic (time dial setting and pickup value) or four settings (time dial setting, pickup and the parameters that control the characteristic shape A & <inline-formula> <tex-math notation="LaTeX">$B$ </tex-math></inline-formula>)). The proposed scheme is extensively tested using MATLAB simulations on the modified IEEE 14 bus meshed network embedded with synchronous/inverter-based distributed generation units under wide variations in operating conditions and short circuit levels for both grid-connected and islanded modes of operation. The achieved results confirm that the proposed coordination scheme can maintain the coordination between primary and backup relays for different fault locations, types and different topologies. It provides selective, reliable, and secured microgrid operation compared with conventional schemes, using fault current limiters and some other techniques discussed in the literature. |
| format |
article |
| author |
Mohamed Ahmed Dawoud Doaa Khalil Ibrahim Mahmoud Ibrahim Gilany Aboul'Fotouh El'Gharably |
| author_facet |
Mohamed Ahmed Dawoud Doaa Khalil Ibrahim Mahmoud Ibrahim Gilany Aboul'Fotouh El'Gharably |
| author_sort |
Mohamed Ahmed Dawoud |
| title |
Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| title_short |
Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| title_full |
Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| title_fullStr |
Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| title_full_unstemmed |
Robust Coordination Scheme for Microgrids Protection Based on the Rate of Change of Voltage |
| title_sort |
robust coordination scheme for microgrids protection based on the rate of change of voltage |
| publisher |
IEEE |
| publishDate |
2021 |
| url |
https://doaj.org/article/86b1549a3d9b47fba9e918f99c7e5ef1 |
| work_keys_str_mv |
AT mohamedahmeddawoud robustcoordinationschemeformicrogridsprotectionbasedontherateofchangeofvoltage AT doaakhalilibrahim robustcoordinationschemeformicrogridsprotectionbasedontherateofchangeofvoltage AT mahmoudibrahimgilany robustcoordinationschemeformicrogridsprotectionbasedontherateofchangeofvoltage AT aboulfotouhelgharably robustcoordinationschemeformicrogridsprotectionbasedontherateofchangeofvoltage |
| _version_ |
1718406151317487616 |