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Nonlinear coordinated control of STATCOM and generator excitation for multi‐machine power systems based on improved multi‐objective holographic feedback
Author(s) -
Li Xiaocong,
Chen Dengyi
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22707
Subject(s) - control theory (sociology) , nonlinear system , generator (circuit theory) , electric power system , excitation , equilibrium point , nonlinear control , permanent magnet synchronous generator , computer science , transient (computer programming) , control engineering , voltage , power (physics) , engineering , control (management) , physics , quantum mechanics , artificial intelligence , electrical engineering , operating system
Aiming at the coordination control problem of the static synchronous compensator (STATCOM) and generator excitation in a multi‐machine system, an improved multi‐objective holographic feedback (IMOHF) control method is proposed to ensure good dynamic and static state performance of each state in the system. First, the essence of IMOHF is deduced by the Hartman–Grobman theorem. The nonlinear differential algebraic equation (NDAE) system is used to arrange the poles in the vicinity of the equilibrium point by nonlinear feedback; the feedback coefficients are adjusted to constrain the objective variables, so that the variables converge rapidly in their respective references. Then this design concept is applied to the decentralized coordination control strategy of STATCOM and generator excitation. Two kinds of multi‐objective holographic feedback nonlinear control laws with active power, synchronous speed, generator terminal voltage, and STATCOM terminal voltage as control objectives are obtained. Simulation result of the three‐machine nine‐bus system shows that these two kinds of control laws can effectively restrain the power system oscillation and improve the transient stability of the system, and consequently the system voltage will not generate any static shift under different disturbances. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.