Open AccessPower system small‐signal stability region calculation method based on the guardian map theory
Author(s) -
Ma Jing,
Wang Shangxing,
Wang Zengping,
Thorp James S.
Publication year - 2014
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2013.0684
Subject(s) - guardian , electric power system , signal (programming language) , stability (learning theory) , power (physics) , computer science , control theory (sociology) , artificial intelligence , physics , control (management) , quantum mechanics , machine learning , political science , law , programming language
In view of the potential problems in the system such as sustained oscillation and low damping ratio, which are not considered in traditional small‐signal stability region (SSSR), an improved SSSR (ISSSR) calculation method based on the guardian map is proposed. First, according to the map theory, the system is mapped from the ISSSR to the negative half‐plane. Then by direct sum operation the guardian map is constituted. Finally, the guardian map approach, which is able to solve the exact stability region of the Hurwitz matrix, is used for fast and accurate calculation of the boundary of ISSSR. Simulation tests on the IEEE 4‐machine 11‐node system and 16‐machine 68‐node system verify the correctness and effectiveness of the proposed method. Besides, the influence of the generator excitation system parameters on the ISSSR is also analysed, which is highly valuable in system dispatching instruction and small disturbance instability prevention.