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Power system dynamic equivalence based on a new model reduction technique
Author(s) -
Takimoto Akira
Publication year - 1994
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.4391140706
Subject(s) - electric power system , control theory (sociology) , reduction (mathematics) , equivalence (formal languages) , dynamic and formal equivalence , coordinate system , transient (computer programming) , stability (learning theory) , modal analysis , modal , generator (circuit theory) , power (physics) , computer science , engineering , mathematics , finite element method , control (management) , physics , chemistry , geometry , machine translation , structural engineering , discrete mathematics , quantum mechanics , artificial intelligence , machine learning , polymer chemistry , operating system
Power system dynamic equivalents play an important role in the effort to reduce the computational burden of the transient stability analysis of power systems. This paper proposes a new efficient practical algorithm for forming linear dynamic equivalents for power systems based on modal analysis. The main feature of the proposed method is that the accuracy of the equivalent model is greatly improved by converting a coordinate system representing the subsystem from the R‐J coordinate system of the main system to the reference generator D‐Q coordinate system of the subsystem. The order reduction is based on aggregation of similar modes and elimination of the inferior modes without significant effect on the frequency response of the subsystem. Thus the equivalent obtained by the proposed method can be used for both steady‐state and transient stability analysis studies. To verify the dynamic equivalent performance stability simulation results for a model power system composed of 16 generators also are shown.