Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks
This paper proposes a novel protection method for low- and medium-voltage DC networks. It is an easy-to-implement, low-cost, and communication-free protection scheme, applicable in ring configurations. The relays in this method calculate the difference between the post-fault and pre-fault currents,...
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| Format: | Article |
| Language: | English |
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IEEE
2025-01-01
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| Series: | IEEE Access |
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| Online Access: | https://ieeexplore.ieee.org/document/11048538/ |
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| author | Evangelos E. Pompodakis Georgios I. Orfanoudakis Theofilos A. Papadopoulos |
| author_facet | Evangelos E. Pompodakis Georgios I. Orfanoudakis Theofilos A. Papadopoulos |
| author_sort | Evangelos E. Pompodakis |
| collection | DOAJ |
| description | This paper proposes a novel protection method for low- and medium-voltage DC networks. It is an easy-to-implement, low-cost, and communication-free protection scheme, applicable in ring configurations. The relays in this method calculate the difference between the post-fault and pre-fault currents, and the tripping time is determined using a time-current curve based on this difference. The core principle of the proposed scheme leverages the reduction in post-fault load current, caused by the significant voltage drop, and the controllable increase in inverter-based distributed generation current relative to their pre-fault values. As a result, relays located closer to the fault detect a more significant current variation, making them trip first. Specifically, in the simulations, relays located near the fault detect a current variation from 100 A to 300 A due to the fault, which can be effectively leveraged for fault detection. This behavior enhances selectivity and ensures reliable backup operation. Simulations conducted in MATLAB/Simulink validate the method speed, selectivity, and reliability. Moreover, the method demonstrates strong noise immunity, as confirmed by simulations, even for signal-to-noise ratios (SNR) as high as 10 dB. A brief comparison with state-of-the-art protection schemes underscores the advantages of the proposed method. |
| format | Article |
| id | doaj-art-e8519d6e641c4b01a07a986e37fbd4b2 |
| institution | Matheson Library |
| issn | 2169-3536 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj-art-e8519d6e641c4b01a07a986e37fbd4b22025-06-30T23:00:47ZengIEEEIEEE Access2169-35362025-01-011310957910959210.1109/ACCESS.2025.358249811048538Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC NetworksEvangelos E. Pompodakis0https://orcid.org/0000-0001-6702-2149Georgios I. Orfanoudakis1https://orcid.org/0000-0001-5003-6624Theofilos A. Papadopoulos2https://orcid.org/0000-0001-6384-1964Electrical and Computer Engineering Department, Hellenic Mediterranean University, Heraklion, GreeceElectrical and Computer Engineering Department, Hellenic Mediterranean University, Heraklion, GreeceSchool of Electrical and Computer Engineering, Aristotle University of Thessaloniki, Thessaloniki, GreeceThis paper proposes a novel protection method for low- and medium-voltage DC networks. It is an easy-to-implement, low-cost, and communication-free protection scheme, applicable in ring configurations. The relays in this method calculate the difference between the post-fault and pre-fault currents, and the tripping time is determined using a time-current curve based on this difference. The core principle of the proposed scheme leverages the reduction in post-fault load current, caused by the significant voltage drop, and the controllable increase in inverter-based distributed generation current relative to their pre-fault values. As a result, relays located closer to the fault detect a more significant current variation, making them trip first. Specifically, in the simulations, relays located near the fault detect a current variation from 100 A to 300 A due to the fault, which can be effectively leveraged for fault detection. This behavior enhances selectivity and ensures reliable backup operation. Simulations conducted in MATLAB/Simulink validate the method speed, selectivity, and reliability. Moreover, the method demonstrates strong noise immunity, as confirmed by simulations, even for signal-to-noise ratios (SNR) as high as 10 dB. A brief comparison with state-of-the-art protection schemes underscores the advantages of the proposed method.https://ieeexplore.ieee.org/document/11048538/DC networksfaultsprotection systemselectivitybackup protectionring networks |
| spellingShingle | Evangelos E. Pompodakis Georgios I. Orfanoudakis Theofilos A. Papadopoulos Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks IEEE Access DC networks faults protection system selectivity backup protection ring networks |
| title | Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks |
| title_full | Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks |
| title_fullStr | Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks |
| title_full_unstemmed | Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks |
| title_short | Communication-Free Protection Scheme With Improved Selectivity and Backup Reliability for Ring DC Networks |
| title_sort | communication free protection scheme with improved selectivity and backup reliability for ring dc networks |
| topic | DC networks faults protection system selectivity backup protection ring networks |
| url | https://ieeexplore.ieee.org/document/11048538/ |
| work_keys_str_mv | AT evangelosepompodakis communicationfreeprotectionschemewithimprovedselectivityandbackupreliabilityforringdcnetworks AT georgiosiorfanoudakis communicationfreeprotectionschemewithimprovedselectivityandbackupreliabilityforringdcnetworks AT theofilosapapadopoulos communicationfreeprotectionschemewithimprovedselectivityandbackupreliabilityforringdcnetworks |