{"id":{"repo_id":"utc","oai_identifier":"oai:scholar.utc.edu:theses-1904"},"canonical_url":"https://search.dev.ndltd.org/etd/utc/oai:scholar.utc.edu:theses-1904","repository":{"repo_id":"utc","name":"University of Tennessee - Chattanooga","base_url":"https://scholar.utc.edu/do/oai/"},"display":{"title":"Qualitative insights into the voltage stability problem","abstract":"This work investigates some of the bus indicators for the problem of voltage stability. The purpose is to learn more about the behavior and to observe the factors that cause mis-ranking in estimating the stability margin. Three indicators are examined, the L-index, the coupled-port method, and the P-index. it found that the L-index does not have a reliable alarm level, and when flagged with an alarm used for the P-index, it shows a large variation of the estimation accuracy across systems. Also, the coupled single-port method is a reformulated L-index method with no novelty on estimation, the novelty is only in the presentation. Finally, the P-index is examined and found to be more reliable if it coincides with a maximum P-index and greater participation in the collapse mode. This is tested on benchmark systems; the results indicate that this approach leads to a better estimation in many cases.","abstract_html":"This work investigates some of the bus indicators for the problem of voltage stability. The purpose is to learn more about the behavior and to observe the factors that cause mis-ranking in estimating the stability margin. Three indicators are examined, the L-index, the coupled-port method, and the P-index. it found that the L-index does not have a reliable alarm level, and when flagged with an alarm used for the P-index, it shows a large variation of the estimation accuracy across systems. Also, the coupled single-port method is a reformulated L-index method with no novelty on estimation, the novelty is only in the presentation. Finally, the P-index is examined and found to be more reliable if it coincides with a maximum P-index and greater participation in the collapse mode. This is tested on benchmark systems; the results indicate that this approach leads to a better estimation in many cases.","abstract_has_math":false,"creators":["Mohamed, Mohamed Salah Ahmed"],"institution":"University of Tennessee at Chattanooga","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Karrar, Abdelrahman A.","Eltom, Ahmed H.; Kobet, Gary L.","College of Engineering and Computer Science"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":null,"date_issued":"","date_published":null,"updated_at":"2026-07-24T05:47:06Z","subjects":["Electric power distribution","Electric power system stability","Electric power systems--Control"],"languages":["English","eng"],"rights":[],"rights_urls":["http://rightsstatements.org/vocab/InC/1.0/"],"identifier_entries":[]},"links":{"outbound_url":"https://scholar.utc.edu/theses/736","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Karrar, Abdelrahman A.","Eltom, Ahmed H.; Kobet, Gary L.","College of Engineering and Computer Science"]},{"key":"dc:creator","label":"Author","values":["Mohamed, Mohamed Salah Ahmed"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2021-12-01T08:00:00Z"]},{"key":"dc:publisher","label":"Institution","values":["University of Tennessee at Chattanooga","Chattanooga (Tenn.)"]},{"key":"dc:relation","label":"Dc Relation","values":["Masters Theses and Doctoral Dissertations"]},{"key":"dc:type","label":"Dc Type","values":["Masters theses","Text"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Electric power distribution","Electric power system stability","Electric power systems--Control"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English","eng"]},{"key":"dc:rights","label":"Dc Rights","values":["http://rightsstatements.org/vocab/InC/1.0/"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholar.utc.edu/theses/736"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Dept. of Electrical Engineering","M. S.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science."]},{"key":"dc:description.abstract","label":"Abstract","values":["This work investigates some of the bus indicators for the problem of voltage stability. The purpose is to learn more about the behavior and to observe the factors that cause mis-ranking in estimating the stability margin. Three indicators are examined, the L-index, the coupled-port method, and the P-index. it found that the L-index does not have a reliable alarm level, and when flagged with an alarm used for the P-index, it shows a large variation of the estimation accuracy across systems. Also, the coupled single-port method is a reformulated L-index method with no novelty on estimation, the novelty is only in the presentation. Finally, the P-index is examined and found to be more reliable if it coincides with a maximum P-index and greater participation in the collapse mode. This is tested on benchmark systems; the results indicate that this approach leads to a better estimation in many cases."]},{"key":"dc:title","label":"Title","values":["Qualitative insights into the voltage stability problem"]}]}],"canonical_facts":{"dc:contributor":["Karrar, Abdelrahman A.","Eltom, Ahmed H.; Kobet, Gary L.","College of Engineering and Computer Science"],"dc:creator":["Mohamed, Mohamed Salah Ahmed"],"dc:date":["2021-12-01T08:00:00Z"],"dc:description":["Dept. of Electrical Engineering","M. S.; A thesis submitted to the faculty of the University of Tennessee at Chattanooga in partial fulfillment of the requirements of the degree of Master of Science."],"dc:description.abstract":["This work investigates some of the bus indicators for the problem of voltage stability. The purpose is to learn more about the behavior and to observe the factors that cause mis-ranking in estimating the stability margin. Three indicators are examined, the L-index, the coupled-port method, and the P-index. it found that the L-index does not have a reliable alarm level, and when flagged with an alarm used for the P-index, it shows a large variation of the estimation accuracy across systems. Also, the coupled single-port method is a reformulated L-index method with no novelty on estimation, the novelty is only in the presentation. Finally, the P-index is examined and found to be more reliable if it coincides with a maximum P-index and greater participation in the collapse mode. This is tested on benchmark systems; the results indicate that this approach leads to a better estimation in many cases."],"dc:identifier":["https://scholar.utc.edu/theses/736"],"dc:language":["English","eng"],"dc:publisher":["University of Tennessee at Chattanooga","Chattanooga (Tenn.)"],"dc:relation":["Masters Theses and Doctoral Dissertations"],"dc:rights":["http://rightsstatements.org/vocab/InC/1.0/"],"dc:subject":["Electric power distribution","Electric power system stability","Electric power systems--Control"],"dc:title":["Qualitative insights into the voltage stability problem"],"dc:type":["Masters theses","Text"]},"updated_at":"2026-07-24T05:47:06Z"}