DocumentCode :
1036821
Title :
Terminal voltage regulation characteristics by static var compensator for a three-phase self-excited induction generator
Author :
Ahmed, Tarek ; Noro, Osamu ; Hiraki, Eiji ; Nakaoka, Mutsuo
Author_Institution :
Dept. of Electr. & Electron. Syst. Eng., Yamaguchi Univ., Japan
Volume :
40
Issue :
4
fYear :
2004
Firstpage :
978
Lastpage :
988
Abstract :
In this paper, the practical impedance approach steady-state analysis in the frequency domain for the three-phase self-excited induction generator (SEIG) with squirrel-cage rotor is presented along with its operating performance evaluations. The three-phase SEIG is driven by a variable-speed prime mover(VSPM) in addition to a constant-speed prime mover (CSPM) such as a wind turbine and a micro gas turbine for clean alternative renewable energy in rural areas. The basic steady-state characteristics of the VSPM are considered in the three-phase SEIG approximate equivalent circuit and the operating performance of the three-phase SEIG coupled with a VSPM and/or a CSPM are evaluated and discussed online under the conditions related to the speed changes of the prime mover and the electrical inductive load power variations with simple computation processing procedures. A three-phase SEIG prototype setup with a VSPM is implemented for small-scale clean renewable and alternative energy utilizations. The experimental performance results give good agreement with those obtained from the simulation results. Furthermore, a proportional-integral (PI) closed-loop feedback voltage regulation of the three-phase SEIG driven by the VSPM on the basis of the static var compensator (SVC) composed of the thyristor phase-controlled reactor in parallel with the thyristor switched capacitor and the fixed-excitation capacitor bank is designed and considered for the wind generation as a renewable power conditioner. The simulation analysis and experimental results obtained from the three-phase SEIG with SVC for its voltage regulation prove the practical effectiveness of the additional SVC with the PI-controller-based feedback loop in steady-state operation in terms of high performance with low cost.
Keywords :
PI control; asynchronous generators; capacitor switching; closed loop systems; feedback; frequency-domain analysis; gas turbines; machine control; power utilisation; renewable energy sources; rotors; static VAr compensators; thyristor applications; voltage control; wind turbines; constant-speed prime mover; electrical inductive load power variation; energy utilization; equivalent circuit; fixed-excitation capacitor bank; microgas turbine; proportional-integral closed-loop feedback; renewable energy; squirrel-cage rotor; static Var compensator; steady-state analysis; terminal voltage regulation; three-phase excited induction generator; thyristor phase-controlled reactor; thyristor switched capacitor; variable-speed prime mover; wind turbine; Capacitors; Frequency domain analysis; Impedance; Induction generators; Performance analysis; Static VAr compensators; Steady-state; Thyristors; Voltage control; Wind turbines; SEIG; SVC; Stable voltage regulation; static var compensator; three-phase self-excited induction generator; variable-speed wind turbine;
fLanguage :
English
Journal_Title :
Industry Applications, IEEE Transactions on
Publisher :
ieee
ISSN :
0093-9994
Type :
jour
DOI :
10.1109/TIA.2004.830783
Filename :
1315787
Link To Document :
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