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A method for analysis of back‐swing phenomena of synchronous machine in multimachine power systems
Author(s) -
Mitani Yasunori,
Tsuji Kiichiro
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.4391140602
Subject(s) - swing , control theory (sociology) , armature (electrical engineering) , electric power system , transient (computer programming) , torque , synchronous motor , electric power transmission , engineering , fault (geology) , computer science , power (physics) , physics , electromagnetic coil , electrical engineering , control (management) , quantum mechanics , seismology , geology , mechanical engineering , thermodynamics , artificial intelligence , operating system
This paper describes a new approach to the analysis of the back‐swing phenomena in multimachine power systems. When a short‐circuit fault occurs in a power system, some generators decelerate in a short period immediately after the fault in some cases. The phenomenon called back swing is caused by the transient responses in armature winding of synchronous machines and in transmission lines. To represent the back swing in detail by a mathematical model, these transient behaviors have to be described by sets of differential equations. Then not only does the order of differential equations increase, but the convenient expression of the transmission system by a set of node equations becomes useless. In this paper an equivalent power system model for the simple representation of the back swing has been proposed. First, an impedance for each machine that represents the transient of transmission system has been introduced. It is assembled into the differential equations associated with armature winding response. Then the transmission system is represented by a constant impedance matrix. This model makes it possible to calculate the transient behavior of armature flux in multimachine power systems. The transient torque brought to the rotor shaft by the flux is calculated directly and it represents the back‐swing phenomena effectively.