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A phase‐plane‐based dynamic coherency real‐time identification scheme for controlled islanding
Author(s) -
Yang Songhao,
Hojo Masahide,
Zhang Baohui
Publication year - 2019
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22839
Subject(s) - islanding , blackout , generator (circuit theory) , scheme (mathematics) , constraint (computer aided design) , computer science , topology (electrical circuits) , electric power system , phase (matter) , phasor , phase plane , three phase , identification (biology) , power (physics) , plane (geometry) , control theory (sociology) , engineering , electrical engineering , control (management) , voltage , physics , mathematics , mathematical analysis , botany , quantum mechanics , nonlinear system , artificial intelligence , biology , mechanical engineering , geometry
Controlled islanding often acts as the last resort against a severe blackout. Generator coherency is the primary constraint to determine an effective controlled islanding strategy. This article proposes a scheme to identify the dynamic coherency of generators for controlled islanding. The generator coherency is identified based on the phase‐plane trajectory vectors (PTVs) on the phase plane for generators (PPG). Then, a phase plane for buses (PPB) is proposed to assign the nongenerator buses to coherent generator groups following the minimum distance principle. The separated islands are formed by disconnecting certain transmission lines according to the identified coherent generators and areas. The case studies on the IEEE 39‐bus 10‐machine power system show that the proposed scheme cannot only adapt to different disturbances and changes of system conditions and network topology but also succeed in identifying the generator coherency at different times and developing proper islanding strategies according to current system states. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.