Decentralized nonlinear coordinated excitation and steam valve adaptive control for multi-machine power systems |
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| Affiliation: | 1. CNR - Institute of Complex Systems, Via Madonna del Piano 10, Sesto Fiorentino I-50019, Italy;2. Unmanned Systems Res. Institute, Northwestern Polytechnical University, Xi''an 710072, China;3. Moscow Institute of Physics and Technology, Dolgoprudny, Russian Federation;4. Physics Department, FCEyN, U. of Buenos Aires, IFIBA, CONICET, Buenos Aires, Argentina;5. Nonlinear Artificial Intelligence Lab, Dept. of Phys., North Carolina University, Raleigh, NC 27695, USA;6. Institute for Groundwater Studies, University of the Free State, South Africa;7. Department of Medical Research, China Medical University, Taichung, Taiwan;1. Department of Electrical and Computer Engineering, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea;2. Department of Physics, 2, Busandaehak-ro 63 beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea |
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| Abstract: | In this paper, a decentralized nonlinear coordinated excitation and steam valve adaptive control combined with a modified high-order sliding mode differentiator is designed for multi-machine power system stability enhancement. The proposed control scheme is based on Lyapunov’s direct method and requires only local information on the physically available measurements of relative angular speed, active electric power and terminal voltage with the assumption that the power angle and mechanical power input are not available for measurement. Each synchronous generator is considered as a classical fifth order model that includes turbine dynamics. The simplicity of the proposed scheme and its robustness with respect to large perturbations, change in operating point and parameter uncertainties constitute the main positive features. Simulation results in the case of the Kundur 4-machines 2-area power system show the effectiveness, robustness and superiority of the proposed scheme over the classical AVR/PSS. |
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| Keywords: | Multi-machine power system Decentralized nonlinear control Excitation control Steam-valve control Adaptive control |
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