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Method of Stabiiizing Power Systems Using Variable Series Impedance
Author(s) -
Senjyu Tomonobu,
Uezato Katsumi
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.4391150206
Subject(s) - control theory (sociology) , electric power system , ac power , engineering , permanent magnet synchronous generator , robustness (evolution) , inductance , control engineering , control system , voltage , computer science , power (physics) , control (management) , physics , biochemistry , chemistry , quantum mechanics , artificial intelligence , electrical engineering , gene
The stabilizing facilities for power systems, i.e., series capacitor, system damping resistor, superconducting magnetic energy storage (SMES), phase shiftcr, etc., are used to improve the stability of synchronous generators. The control principle of these facilities to enhance the system damping is the same in the sense that these stabilizers control the active power so as to stabilize power systems. The generalized control method for these facilities has not been studied from the viewpoint of active power control. The generalized control method applying the variable structure control from the viewpoint of acceleration power for the synchronous generators is proposed in this paper. The variable structure control can be applied to both nonlinear and linear systems and has robustness against parameter variations. In this paper, the control law is derived first in general form from the viewpoint of active power in the synchronous generator. This control law can take into account the automatic voltage regulator and governor effect indirectly. The feedback gains of the controller can be determined taking into account parameter variations in the synchronous generator. Second, this method is applied to the one‐machine infinite‐bus system with a variable series inductance so as to investigate the validity of this control method. The simulation results show that the controller is able to improve the system damping of the power system and is especially effective against parameter variations.