Abstract: Disclosed are a method and a system for correlating hydro-turbine governing system control parameters and oscillation characteristics, and the method includes the steps: calculating a eigenvalue, a zero point and a pole of a state matrix in a hydro-turbine governing system state space model, taking a pole which is the closest to the imaginary axis and has no zero point in a preset distance as a dominant eigenvalue; determining an oscillation characteristic region of the hydro-turbine governing system on the complex plane according to the dominant eigenvalue; obtaining a system control parameter stability domain according to a Hurwitz stability criterion; and calculating dominant eigenvalues corresponding to different control parameters, classifying the control parameters according to an oscillation characteristic region of a complex plane where the dominant eigenvalue is located, and dividing the oscillation characteristic region in a system control parameter stability domain.

Abstract: The disclosure provides a method and a system for calculating a stability margin domain of the control parameters of a hydraulic turbine regulating system, which belongs to the technical field of stability margin analysis of the hydraulic turbine regulating system. The method includes: determining a high-order state space model of the hydraulic turbine regulating system; determining a dominant eigenvalue and an interference eigenvalue of a state matrix of the high-order state space model; determining an associated state variable of the interference eigenvalue; determining the interference eigenvalues under different target control parameter conditions; determining whether a target control parameter meets a stability margin requirement; and determining the stability margin domain of the control parameter.