一种水轮机调节系统根轨迹绘制方法研究

在以往对水轮机调节系统根轨迹绘制的研究中,在确定其根轨迹时往往忽略了一些影响较小的参数,而这种忽略对于开展水轮机调节系统动态品质的分析会产生一定的影响。针对上述问题,采用水轮机调节系统的闭环传递函数的特征方程进行根轨迹绘制的方法,从而可有效避免忽略一些次要因素,进而分析其中水轮机的调节系统对转速给定信号的调节时间,以便对根轨迹上的共轭复数极点、实数极点与缓冲时间常数及暂态转差系数之间的关系展开研究。对水轮机调节系统根轨迹的绘制方法以及水轮机调节动态品质的分析过程进行了介绍。

Study on a plotting method of root locus for hydro-turbine regulating system

In the past studies on root locus plotting for hydro-turbine regulating system, some of the less affected parameters tend to be ignored in determining the root locus. However, the ignorance has an impact on the dynamic quality of the system in some degree. According to the above problem, the characteristic equation of the closed loop transfer function of the hydro-turbine regulating system is employed to plot the root locus and the ignored problem of some less affected parameters can be avoided effectively. Further, the response time of regulating system to rotate speed signal is analyzed to study the relationships between the poles of conjugate complex number, poles of real number, buffering time constant and temporary droop. The plotting method of root locus for hydro-turbine regulating system and the analysis on regulating quality of hydraulic turbine are introduced.