Synergetic governing controller design for the hydraulic turbine governing system with complex conduit system |
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| Authors: | Jianzhong Zhou Yuncheng Zhang Yang Zheng Yanhe Xu |
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| Institution: | 1. School of Hydropower and Information Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China;2. Hubei Key Laboratory of Digital Valley Science and Technology, Huazhong University of Science and Technology, Wuhan 430074, PR China |
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| Abstract: | The hydraulic turbine governing system plays an indispensable role in maintaining the stability of electrical power system. In this paper, synergetic control theory is introduced to enhance the regulating ability of the hydraulic turbine governing system. For the purpose of describing the characteristics of objective system and deducing the synergetic control rule, a nonlinear mathematic model of a hydraulic turbine governing system with long tail race and two surge tanks is established. Furthermore, the nonlinear characteristic of the hydraulic turbine is described by six variable partial derivatives. For further investigation, the hydraulic turbine governing system is conducted to running under load condition when its coaxial generator connects to an infinite bus. Simulation experiments have been made under both load disturbance and three-phase short circuit fault conditions to compare the dynamic performances of proposed synergetic governing controller and classic PID controller. The results indicate that the proposed synergetic governing controller is an effective alternative in normal condition and a superior one in emergency. Moreover, the robustness of synergetic governing controller has also been discussed at the end of this paper. |
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| Keywords: | Corresponding author at: School of Hydropower and Information Engineering Huazhong University of Science and Technology Wuhan 430074 PR China |
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