MARC details
| 000 -LEADER |
|---|
| fixed length control field |
02630cam a2200325 a 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
EG-GiCUC |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
201210s2020 ua d f m 000 0 eng d |
| 040 ## - CATALOGING SOURCE |
|---|
| Original cataloging agency |
EG-GiCUC |
| Language of cataloging |
eng |
| Transcribing agency |
EG-GiCUC |
| 041 0# - LANGUAGE CODE |
|---|
| Language code of text/sound track or separate title |
eng |
| 049 ## - LOCAL HOLDINGS (OCLC) |
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| Holding library |
Deposite |
| 097 ## - Thesis Degree |
|---|
| Thesis Level |
M.Sc |
| 099 ## - LOCAL FREE-TEXT CALL NUMBER (OCLC) |
|---|
| Classification number |
Cai01.13.07.M.Sc.2020.Mo.A |
| 100 0# - MAIN ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mohamed Kamal Eldin Essawy Afifi |
| 245 10 - TITLE STATEMENT |
|---|
| Title |
Applying multi-objective optimization for enhancing directional overcurrent relays coordination / |
| Statement of responsibility, etc. |
Mohamed Kamal Eldin Essawy Afifi ; Supervised Doaa Khalil Ibrahim , Mahmoud Sayed , Hebatallah Mohamed Sharaf |
| 246 15 - VARYING FORM OF TITLE |
|---|
| Title proper/short title |
تطبيق الأمثلة متعددة الأهداف لتحسين التنسيق بين مرحلات الوقاية الاتجاهية ضد زيادة التيار |
| 260 ## - PUBLICATION, DISTRIBUTION, ETC. |
|---|
| Place of publication, distribution, etc. |
Cairo : |
| Name of publisher, distributor, etc. |
Mohamed Kamal Eldin Essawy Afifi , |
| Date of publication, distribution, etc. |
2020 |
| 300 ## - PHYSICAL DESCRIPTION |
|---|
| Extent |
100 P . : |
| Other physical details |
charts ; |
| Dimensions |
30cm |
| 502 ## - DISSERTATION NOTE |
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| Dissertation note |
Thesis (M.Sc.) - Cairo University - Faculty of Engineering - Department of Electrical Power and Machines Engineering |
| 520 ## - SUMMARY, ETC. |
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| Summary, etc. |
One of the most important requirements of protection system is to isolate and disconnect faulted parts of the system selectively and quickly. Overcurrent relays are used as primary protection for distribution systems or combined with distance relays for protecting subtransmission systems. Coordination of directional overcurrent relays (DOCRs) is a main challenge in power system protection. This thesis studies DOCRs coordination by achieving two main goals. The first goal is introducing a DOCRs coordination comparative study using single-objective and multi-objective optimization approaches. Different fault locations are considered for each method then the results are compared based on the mean fault clearing time of the system, maximum primary and backup relays operating time and maximum coordination time interval. The second goal is introducing an enhanced two-fault point coordination scheme. The scheme employs severity weighting factors for each relay with respect to fault location. The proposed severity weights are calculated based on the ratio of fault currents that pass through the relay so relays with higher and more severe fault current should operate faster than relays with less severe faults |
| 530 ## - ADDITIONAL PHYSICAL FORM AVAILABLE NOTE |
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| Additional physical form available note |
Issued also as CD |
| 653 #4 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Directional overcurrent relays (DOCRs) |
| 653 #4 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Fault current severity |
| 653 #4 - INDEX TERM--UNCONTROLLED |
|---|
| Uncontrolled term |
Multi-objective optimization |
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Doaa Khalil Ibrahim , |
| Relator term |
|
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Hebatallah Mohamed Sharaf , |
| Relator term |
|
| 700 0# - ADDED ENTRY--PERSONAL NAME |
|---|
| Personal name |
Mahmoud Sayed , |
| Relator term |
|
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) |
|---|
| Cataloger |
Amira |
| Reviser |
Cataloger |
| 905 ## - LOCAL DATA ELEMENT E, LDE (RLIN) |
|---|
| Cataloger |
Nazla |
| Reviser |
Revisor |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
|---|
| Source of classification or shelving scheme |
Dewey Decimal Classification |
| Koha item type |
Thesis |
