【摘要】 水力发电系统具有非线性特性,利用线性模型分析水轮机调节系统会导致仿真结果不准确。为此,在考虑水轮机调节系统各部分非线性情况下建立了水轮机调节系统的非线性模型。基于Hopf分岔理论对建立的非线性调节系统模型进行分析和仿真,比较线性模型与非线性模型动态特性。结果表明,非线性系统模型能更准确地反映系统大扰动情况下的本质特性,PID参数变化会引起非线性系统拓扑结构的变化。更多还原

【Abstract】 The hydropower system has nonlinear characteristics.Using the linear model to analyze hydro-turbine governing system will lead to inaccurate simulation results.For this reason,a non-linear model of hydro-turbine governing system was established considering the non-linearity of each part of the hydro-turbine governing system.The stability analysis and simulation were carried out for nonlinear hydro-turbine governing system based on Hopf bifurcation theory,and the dynamic characteristics of linear model and nonlinear model were compared.The results show that the nonlinear system model can more accurately reflect the essential characteristics of the system under large disturbances,and the change of PID parameters can lead to the change of the topology of nonlinear system.更多还原