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中文摘要：
根据有压管道的非恒定流方程建立水电站均匀压力管道的兀型等值电路模型，将不同长度的压力引水管道采用1个或多个兀型模型等效，从而得到整个引水管道的等值电路模型。新方法可用于压力管道的快速建模，建立入流和出流2个断面的流量一水头压力的状态框图，便于研究者构建整个水力系统的模型以研究水电站过渡过程中水机电之间的相互影响。最后对不同类型水击和不同长度的压力钢管进行仿真，并将电路等值方法和特征线方法比较。仿真结果表明电路等值方法正确、有效。
英文摘要：
This paper presents a π equivalent circuit model of penstock in hydro-plant based on the transient flow function of penstock. The whole conduit circuit model can be built by this proposed method using one or more π circuit model to express penstock in the research of transients. The method can be used to form the state block of flow and head from inflow to outflow for the fast modeling of penstock, which is easy for researcher to study the impact between hydraulics, mechanism and electricity. Comparisons between various lengths of penstock and different types of waterhammer using circuit equivalent method and characteristic method are presented by digital simulation. Results of digital simulation show that the proposed method is correct and effective.
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