Two approaches for directional overcurrent relays coordination in interconnected power systems with distributed generation | ||||
| The International Conference on Electrical Engineering | ||||
| Article 97, Volume 8, 8th International Conference on Electrical Engineering ICEENG 2012, May 2012, Page 1-17 PDF (676.86 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/iceeng.2012.32761 | ||||
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| Authors | ||||
| Saadoun Abd ElAziz Mostafa1; Doaa khalil Ibrahim2; Essam El-Din Abo El-Zahab2 | ||||
| 1Arab Contractor Company, Egypt. | ||||
| 2Faculty of Engineering, Cairo University, Egypt. | ||||
| Abstract | ||||
| Abstract: Connection of distributed generation (DGs) powered by renewable energy resources in power systems has numerous benefits. However the presence of these (DGs) increase the fault current levels in different points, and disturb the protection coordination of the existing relays. Two approaches are proposed for coordination of directional overcurrent relays (DOCRs) in power systems with (DGs), depending on the types of system relays either adaptive or non adaptive. For adaptive protection system, the first proposed approach is based on linear programming technique which used to calculate the relay settings in case of DGs existing or not. For non-adaptive protection system, the second proposed approach is introduced, in which minimum impedance of fault current limiter is calculated to restore the coordination of relays without altering the original relay settings. The two proposed approaches are implemented and tested on IEEE-39 bus test system. | ||||
| Keywords | ||||
| Distributed generation; Fault Current Limiter; Relay Setting; Relays Coordination | ||||
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