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1 数学模型与系统框图1.1 具有模拟式调速器的水轮机调节系统当混流式水轮机调速器以主接力器反馈方式时,由于辅助接力器的时间常数很小,可以忽略;同时,考虑到水轮机流量对转速的传递系数e_(qx)对系统的动态影响很小,可以得到如图1所示的系统框图。如研究由中间接力器反馈方式,此时主接力器变成随动机构,为一阶非周期环节,即在图1中加入虚线方框表示的环节。
1 Mathematical Model and System Block Diagram 1.1 Turbine Regulating System with Analog Governor When the Francis turbine governor is fed by main relay, the auxiliary time relay is negligible due to the small time constant of the auxiliary relay. At the same time, Flow rate of the transfer coefficient e_ (qx) on the dynamic impact of the system is small, you can get the system block diagram shown in Figure 1. Such as the research by the intermediate relay feedback, then the main relay into a follow-up mechanism for the first-order non-periodic links, that is, in Figure 1 by adding a dotted line box.