Abstract
Due to its characteristics, hydropower turbines may provide negative damping in the process of ultra-low frequency oscillation. It is necessary to improve the response of hydropower units in the process of ultra-low frequency oscillation by adjusting the PID parameters reasonably. Although the adjustment of PID parameters can significantly improve the damping characteristics of hydropower turbines, it will sacrifice a certain speed of regulation, which is not conducive to the primary frequency regulation of the system. Through the establishment of the hydroelectric turbines model, the damp and regulating speed are optimized as the control objectives, so that better parameters can be obtained to suppress the ultra-low frequency oscillation of the system.
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