Simulation model for electro-hydraulic servo system of double-adjustment hydraulic turbine governor

Abstract

The invention relates to a simulation model for an electro-hydraulic servo system of a double-adjustment hydraulic turbine governor, which comprises two mutually independent forward paths and a linkage relation link, and is characterized in that the two mutually independent forward paths are respectively a guide vane control path and a paddle control path; wherein the guide vane control path and the paddle control path have completely same calculation links; the calculation link comprises a PID link, an amplitude limiting link, a time constant link, an integration link, an integration amplitude limiting link, a negative feedback link and an output delay link. The simulation model is suitable for modeling work of all double-adjustment hydraulic turbine governor electro-hydraulic servo systems, high model precision can be achieved, and model parameters can be conveniently obtained.

Description

technical field [0001] The invention relates to the technical field of hydraulic turbine governor modeling and power system simulation calculation, in particular to a double-adjustment hydraulic turbine governor electro-hydraulic follow-up system simulation model. Background technique [0002] The modeling and simulation of hydro-generator sets is one of the main contents of power system simulation calculation, and the speed-regulating system of hydro-turbine is an important part of hydro-generator sets. At present, in the domestic and foreign research on the modeling and simulation of the electro-hydraulic servo system of the turbine governor, some studies simply pursue simplicity, such as using the first-order inertia model with the reaction time constant of the servomotor, but this model ignores the Many nonlinear links lead to low calculation accuracy of the model; some studies model the components of the electro-hydraulic servo system (such as integrated amplifiers, ele...

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Problems solved by technology

At present, in the domestic and foreign research on the modeling and simulation of the electro-hydraulic servo system of the turbine governor, some studies simply pursue simplicity, such as using the first-order inertia model with the reaction time constant of the servomotor, but this model ignores the Many nonlinear links lead to low calculation accuracy of the model; some studies model the components of the electro-hydraulic servo system (such as integrated amplifiers, electrical-mechanical / hydraulic conversion devices, main pressure distribution valves, and servomotors) separately When integrated, although the physical meaning of this modeling method is clear, it requires many parameters and is difficult to obtain.

In addition, most of the current research is only applicable to the single-adjustment hydro-generator set represented by the Francis unit, but for the double-adjustment hydro-generator set represented by the axial-flow propeller type and the bulb tubular type, it is not There is little mention of the electro-hydraulic follow-up system model of the turbine governor

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