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Currently used flow equation of rotameter was obtained by analogy of orifice meter, which is not rigorous in theoretic. In this paper, according to the fluid motion characteristics in rotameter, the integrity form flow equation of rotameter is derived based on flow around a body, and the tapered tube rotameter flow equation with dead zone error is also derived, the experimental results related flow...
Take the typical SCR excitation system including AVR(auto voltage regulator) and PSS(power system stabilizer) as an example, AVR and PSS branches were converted into their equivalent circuits,The controller energy function was derived by circuit parameters, and constituted in circuit parameters of AVR and PSS branch , then, the controller energy function was added to the Hamiltonian function of generator...
The structure of dynamic models of nonlinear hydro turbine with elastic water column is studied in this paper. The nonlinear differential equations for hydraulic system (NDE-HS) are derived based on transfer function model of it. The dynamic model I of hydro turbine is built by combining NDE-HS with the algebraic equation of hydro turbine torque. By means of except of transfer coefficient, the differential...
Because of indeterminacy problem with selecting energy function of generator Hamiltonian model, a modeling method is proposed to derive Hamiltonian model from fundamental energy relation of generator. Under single machine infinite-bus system and ignoring D-Q damping winding, in response to mechanical and electric analytical dynamics, this paper establishes Lagrange functions, dissipation functions...
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