The invention relates to a circuit equivalent
simulation method for a pressure conduit in an electric
system hydraulic
power station, belonging to the hydraulic
power station water power
system modeling field. The method comprises the following steps that: an unsteady flow
transfer matrix is obtained through analysis and calculation of an unsteady flow equation in the pressure conduit, and the
transfer matrix is the same with a forward transmission equation of a uniform transmission facility which ignores the conductance to earth, thereby a pi-shaped
equivalent circuit model of the uniform pressure conduit can be established according to the two-port theory. Pressure diversion conduits with different lengths are equivalent by adoption of one or a plurality of pi-shaped
circuit models, thereby an equivalent point
network model of the whole diversion conduit is obtained. The circuit equivalent
simulation method can be used for quick modeling of the pressure conduit and is convenient for a
system researcher to establish a model of a whole water power system so as to research interaction between hydroelectric power and electromechanical power during the transient process of the hydraulic
power station. Moreover, water hammers of different types and pressure steel pipes of different lengths during the transient process of the hydraulic power
station are simulated by adoption of the method, and both principle analysis and
simulation indicate that the method is correct and effective.