{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/34798"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/34798","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Incorporation of linearized sensitivities in the Ward method of equivalencing","abstract":"Linear reduction of large nonlinear power system networks reduces computation time significantly when studying large numbers of network outages for systems planning purposes. The Ward equivalencing procedure is one such reduction technique which has been used extensively in the industry for three decades. When incremental changes occur in a basecase network using the Ward equivalent, the real-power response from the equivalent is generally very good, but the reactive-power response does not model very well in general. A two-step linearization technique is proposed which updates the Ward equivalent as a function of the outage selected. The updated equivalent models the exact response better than the base case equivalent. Added computation associated with updating the equivalent is modest.","abstract_html":"Linear reduction of large nonlinear power system networks reduces computation time significantly when studying large numbers of network outages for systems planning purposes. The Ward equivalencing procedure is one such reduction technique which has been used extensively in the industry for three decades. When incremental changes occur in a basecase network using the Ward equivalent, the real-power response from the equivalent is generally very good, but the reactive-power response does not model very well in general. A two-step linearization technique is proposed which updates the Ward equivalent as a function of the outage selected. The updated equivalent models the exact response better than the base case equivalent. Added computation associated with updating the equivalent is modest.","abstract_has_math":false,"creators":["Stevens, Robert A."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"M.S.","degree_level":"Thesis","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Schultz, R.D.","Smith, R.A."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-10-23T21:42:32Z","date_published":"2012-10-23T21:42:32Z","updated_at":"2026-07-22T22:25:31Z","subjects":["Ward equivalencing procedure"],"languages":["en"],"rights":["Copyright 1981 Robert A. Stevens"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["80491","(OCoLC)ocm09319801"],"render_values":[{"text":"80491","href":null,"code":true},{"text":"(OCoLC)ocm09319801","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/34798","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Schultz, R.D.","Smith, R.A."]},{"key":"dc:creator","label":"Author","values":["Stevens, Robert A."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-10-23T21:42:32Z","10000-01-01","1982"]},{"key":"dc:relation","label":"Dc Relation","values":["PAP82-05"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M.S."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Ward equivalencing procedure"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1981 Robert A. Stevens"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["80491","(OCoLC)ocm09319801","http://hdl.handle.net/2142/34798"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Linear reduction of large nonlinear power system networks reduces computation time significantly when studying large numbers of network outages for systems planning purposes. The Ward equivalencing procedure is one such reduction technique which has been used extensively in the industry for three decades. When incremental changes occur in a basecase network using the Ward equivalent, the real-power response from the equivalent is generally very good, but the reactive-power response does not model very well in general. A two-step linearization technique is proposed which updates the Ward equivalent as a function of the outage selected. The updated equivalent models the exact response better than the base case equivalent. Added computation associated with updating the equivalent is modest.","Submitted by Sarah Shreeves (sshreeve@illinois.edu) on 2012-10-23T21:42:32Z No. of bitstreams: 1 80491_opt.pdf: 14823373 bytes, checksum: 0f7b29a449be3c2057851ef91681a18d (MD5)","Made available in DSpace on 2012-10-23T21:42:32Z (GMT). No. of bitstreams: 1 80491_opt.pdf: 14823373 bytes, checksum: 0f7b29a449be3c2057851ef91681a18d (MD5) Previous issue date: 1982","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Sarah Shreeves (sshreeve@illinois.edu) on 2012-10-23T21:42:32Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:11:13-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis/Dissertation","Thesis/Dissertation","U of I Only"]},{"key":"dc:title","label":"Title","values":["Incorporation of linearized sensitivities in the Ward method of equivalencing"]}]}],"canonical_facts":{"dc:contributor":["Schultz, R.D.","Smith, R.A."],"dc:creator":["Stevens, Robert A."],"dc:date":["2012-10-23T21:42:32Z","10000-01-01","1982"],"dc:description":["Linear reduction of large nonlinear power system networks reduces computation time significantly when studying large numbers of network outages for systems planning purposes. The Ward equivalencing procedure is one such reduction technique which has been used extensively in the industry for three decades. When incremental changes occur in a basecase network using the Ward equivalent, the real-power response from the equivalent is generally very good, but the reactive-power response does not model very well in general. A two-step linearization technique is proposed which updates the Ward equivalent as a function of the outage selected. The updated equivalent models the exact response better than the base case equivalent. Added computation associated with updating the equivalent is modest.","Submitted by Sarah Shreeves (sshreeve@illinois.edu) on 2012-10-23T21:42:32Z No. of bitstreams: 1 80491_opt.pdf: 14823373 bytes, checksum: 0f7b29a449be3c2057851ef91681a18d (MD5)","Made available in DSpace on 2012-10-23T21:42:32Z (GMT). No. of bitstreams: 1 80491_opt.pdf: 14823373 bytes, checksum: 0f7b29a449be3c2057851ef91681a18d (MD5) Previous issue date: 1982","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Sarah Shreeves (sshreeve@illinois.edu) on 2012-10-23T21:42:32Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:11:13-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: Thesis/Dissertation","Thesis/Dissertation","U of I Only"],"dc:identifier":["80491","(OCoLC)ocm09319801","http://hdl.handle.net/2142/34798"],"dc:language":["en"],"dc:relation":["PAP82-05"],"dc:rights":["Copyright 1981 Robert A. Stevens"],"dc:subject":["Ward equivalencing procedure"],"dc:title":["Incorporation of linearized sensitivities in the Ward method of equivalencing"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["M.S."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:31Z"}