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Dynamic preventive control strategies for power systems considering transient and midterm stabilities
Author(s) -
Kita Hiroyuki,
Hasegawa Jun,
Sato Naohiro,
Nishiya KenIchi
Publication year - 1995
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/eej.4391150402
Subject(s) - synchronism , transient (computer programming) , control theory (sociology) , electric power system , contingency , stability (learning theory) , fault (geology) , instability , engineering , time domain , computer science , control (management) , power (physics) , voltage , linguistics , physics , philosophy , quantum mechanics , artificial intelligence , machine learning , seismology , geology , mechanics , electrical engineering , computer vision , operating system
This paper proposes a new dynamic preventive control strategy to maintain power system security, in terms of both transient and midterm stabilities. While the authors have already presented preventive control strategies for transient stability, a new problem has arisen in midterm instability in which some generators lose synchronism after 10 seconds or more from a fault clearance. It is clear that the cause of the instability is mainly post‐contingency dynamic steady‐state instability. This paper first shows a preventive control strategy for improving midterm stability using a dominant eigenvalue of post‐contingency equilibrium point. This paper also presents a unified dynamic preventive control algorithm that can maintain both stabilities together. In this algorithm, the time domain for each stability problem is considered appropriately and the difference between the classical model and the detailed model is analyzed in detail. The effectiveness of the proposed method is examined with numerical examples for a model system.