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Decentralized control based on equilibrium point control for a three‐machine electric power model system
Author(s) -
Kawamoto Shunji,
Kanetaka Iwao,
Nojiri Kosuke
Publication year - 1998
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/(sici)1520-6416(199802)122:3<28::aid-eej4>3.0.co;2-w
Subject(s) - electric power system , equilibrium point , decentralised system , control theory (sociology) , limiter , control system , power (physics) , electric power , point (geometry) , computer science , control engineering , reliability (semiconductor) , control (management) , generator (circuit theory) , engineering , mathematics , electrical engineering , telecommunications , mathematical analysis , physics , geometry , artificial intelligence , differential equation , quantum mechanics
Electric power systems have become larger and more complex year by year, and the number of decentralized power sources is rapidly increasing, Tberefore, to guarantee high reliability and security, decentralized control based on the decentralization of power systems needs to be developed. In this paper, a decentralized system is constructed by viewing the whole system from the perspective of the generator‐bus with the largest power. Since the decentralized system is identified as a one‐machine infinite‐bus power model system with AVR and GOV, the equilibrium point control, proposed by the authors for a one‐machine system, can be applied to it. Control inputs u a · u g for AVR · GOV are determined, and the equilibrium points of the decentralized system can be moved by changing the feedback gains. In particular, the unstable equilibrium point is set near the outside of the limiters for AVR · GOV, and stability in the limiters is guaranteed. Thus, it is shown that, by repeating the same steps for other generators, decentralized control for the three‐machine model system can be attained. © 1998 Scripta Technica. Electr Eng Jpn, 122(3): 28–36, 1998