{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,12]],"date-time":"2026-05-12T22:21:35Z","timestamp":1778624495274,"version":"3.51.4"},"reference-count":18,"publisher":"The Royal Society","issue":"2100","license":[{"start":{"date-parts":[[2017,7,10]],"date-time":"2017-07-10T00:00:00Z","timestamp":1499644800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/royalsociety.org\/journals\/ethics-policies\/data-sharing-mining\/"}],"funder":[{"name":"Department of Science and Technology, New Delhi, India","award":["DST\/RCUK\/SEGES\/2012\/02"],"award-info":[{"award-number":["DST\/RCUK\/SEGES\/2012\/02"]}]}],"content-domain":{"domain":["royalsocietypublishing.org"],"crossmark-restriction":true},"short-container-title":["Phil. Trans. R. Soc. A."],"published-print":{"date-parts":[[2017,8,13]]},"abstract":"<jats:p>Cascade tripping of power lines triggered by maloperation of zone-3 relays during stressed system conditions, such as load encroachment, power swing and voltage instability, has led to many catastrophic power failures worldwide, including Indian blackouts in 2012. With the introduction of wide-area measurement systems (WAMS) into the grids, real-time monitoring of transmission network condition is possible. A phasor measurement unit (PMU) sends time-synchronized data to a phasor data concentrator, which can provide a control signal to substation devices. The latency associated with the communication system makes WAMS suitable for a slower form of protection. In this work, a method to identify the faulted line using synchronized data from strategic PMU locations is proposed. Subsequently, a supervisory signal is generated for specific relays in the system for any disturbance or stressed condition. For a given system, an approach to decide the strategic locations for PMU placement is developed, which can be used for determining the minimum number of PMUs required for application of the method. The accuracy of the scheme is tested for faults during normal and stressed conditions in a New England 39-bus system simulated using EMTDC\/PSCAD software. With such a strategy, maloperation of relays can be averted in many situations and thereby blackouts\/large-scale disturbances can be prevented.<\/jats:p>\n                  <jats:p>This article is part of the themed issue \u2018Energy management: flexibility, risk and optimization\u2019.<\/jats:p>","DOI":"10.1098\/rsta.2016.0295","type":"journal-article","created":{"date-parts":[[2017,7,13]],"date-time":"2017-07-13T11:34:58Z","timestamp":1499945698000},"page":"20160295","update-policy":"https:\/\/doi.org\/10.1098\/crossmark-policy","source":"Crossref","is-referenced-by-count":4,"title":["Wide-area measurement system-based supervision of protection schemes with minimum number of phasor measurement units"],"prefix":"10.1098","volume":"375","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-1971-712X","authenticated-orcid":false,"given":"Swaroop","family":"Gajare","sequence":"first","affiliation":[{"name":"Control Research Area, ABB Corporate Research Center, Bangalore 560048, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8870-4963","authenticated-orcid":false,"given":"J. Ganeswara","family":"Rao","sequence":"additional","affiliation":[{"name":"Eastern Regional Power Committee, 14 Golf Club Road, Tollygunge, Kolkata 700033, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"O. D.","family":"Naidu","sequence":"additional","affiliation":[{"name":"Control Research Area, ABB Corporate Research Center, Bangalore 560048, India"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6652-2918","authenticated-orcid":false,"given":"Ashok Kumar","family":"Pradhan","sequence":"additional","affiliation":[{"name":"Department of Electrical Engineering, Indian Institute of Technology Kharagpur, Kharagpur 721302, India"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"175","published-online":{"date-parts":[[2017,7,10]]},"reference":[{"key":"e_1_3_6_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRD.2005.860244"},{"key":"e_1_3_6_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TPWRS.2004.825981"},{"key":"e_1_3_6_4_2","unstructured":"IEEE. 2000 IEEE Standard 1363-2000 . IEEE NERC standard specifications for public-key cryptography . 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