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Nonlinear Synergetic Governor Controllers for Steam Turbine Generators to Enhance Power System Stability

Author

Listed:
  • Xingbao Ju

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Ping Zhao

    (College of Electrical Engineering & New Energy, China Three Gorges University, 8 College Road, Yichang 443002, China)

  • Haishun Sun

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Wei Yao

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

  • Jinyu Wen

    (State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China)

Abstract

This paper proposes a decentralized nonlinear synergetic governor controller (NSGC) for turbine generators to enhance power system stability by using synergetic control theory and the feedback linearization technique. The precise feedback linearization model of a turbine-generator with a steam valve control is obtained, at first, by using a feedback linearization technique. Then based on this model, a manifold is defined as a linear combination of the deviation of the rotor angle, speed deviation, and speed derivative. The control law of the proposed NSGC is deduced and the stability condition of the whole closed-loop system is subsequently analyzed. According to the requirement of the primary frequency regulation, an additional proportional integral (PI) controller is designed to dynamically track the steady-state value of the rotor angle. Case studies are undertaken based on a single-machine infinite-bus system and the New England system, respectively. Simulation results show that the proposed NSGC can suppress the power oscillations and improve transient stability more effectively in comparison with the conventional proportional-integral-derivative (PID) governor controller. Moreover, the proposed NSGC is robust to the variations of the system operating conditions.

Suggested Citation

  • Xingbao Ju & Ping Zhao & Haishun Sun & Wei Yao & Jinyu Wen, 2017. "Nonlinear Synergetic Governor Controllers for Steam Turbine Generators to Enhance Power System Stability," Energies, MDPI, vol. 10(8), pages 1-16, July.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:8:p:1092-:d:105992
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    References listed on IDEAS

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    1. Cheng Liu & Guowei Cai & Jiwei Gao & Deyou Yang, 2017. "Design of Nonlinear Robust Damping Controller for Power Oscillations Suppressing Based on Backstepping-Fractional Order Sliding Mode," Energies, MDPI, vol. 10(5), pages 1-23, May.
    2. Ziquan Liu & Wei Yao & Jinyu Wen, 2017. "Enhancement of Power System Stability Using a Novel Power System Stabilizer with Large Critical Gain," Energies, MDPI, vol. 10(4), pages 1-15, April.
    3. Liao, Shiwu & Yao, Wei & Han, Xingning & Wen, Jinyu & Cheng, Shijie, 2017. "Chronological operation simulation framework for regional power system under high penetration of renewable energy using meteorological data," Applied Energy, Elsevier, vol. 203(C), pages 816-828.
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    Cited by:

    1. Antonio T. Alexandridis, 2019. "Studying State Convergence of Input-to-State Stable Systems with Applications to Power System Analysis," Energies, MDPI, vol. 13(1), pages 1-24, December.

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