Control Parameter Partition of Hydro-Turbine Regulation System Based on Regulation Oscillation Characteristics

Ensuring the stability and rapid response of hydroturbine regulation systems (HTRSs) is crucial in HTRS studies. In a fixed control structure, the adjustment of control parameters is a core optimization method. Therefore, this paper investigates the partition of control parameters based on oscillation characteristics, aiming to present the effect of control parameter adjustments on the system graphically. First, a state-space model of a dual-turbine HTRS is established and validated. Then, methods for determining the stability regions of control parameters and partitioning parameters based on oscillation characteristics are introduced. Building on these foundations, various boundaries of control parameters are determined, and the effect of main system parameters on various control parameter boundaries is analyzed. The results of parameter partitioning accurately reflect the effect of control parameter adjustments on oscillation characteristics and stabilization risk. An increase in Tw and a decrease in Ta significantly increase the risk of ultra-low-frequency oscillations. This paper provides reliable methods for regulation analysis and guidance for optimizing the operation of hydropower plants.