Method for generating integrated operation characteristic curve of mixed-flow type prototype water turbine

Abstract

The invention relates to a three-dimensional model conversion technology, aims to solve the problems of high workload, numerous human influence factors, low working efficiency and low drawing precision due to the need for making an auxiliary line during conversion of an integrated characteristic curve of a mixed-flow type model water turbine into an integrated operation characteristic curve of a mixed-flow type prototype water turbine at present, and provides a method for generating the integrated operation characteristic curve of the mixed-flow type prototype water turbine. The method comprises the steps of according to the integrated characteristic curve of the model water turbine, calculating coordinates of points on curves such as an equal efficiency curve, an equal output curve, an equal draft height curve, an equal guide vane opening curve, an equal pressure pulsation curve and the like of the prototype water turbine through computer software; based on this, drawing corresponding isoplethic curves, output limiting curves and the like of the prototype water turbine on H-P and Q-H plane coordinate graphs; and further obtaining operation region partitions of the mixed-flow type prototype water turbine. The method is suitable for converting the integrated characteristic curve of the mixed-flow type model water turbine into the integrated operation characteristic curve of the mixed-flow type prototype water turbine.

Description

technical field [0001] The invention relates to a three-dimensional model conversion technology, in particular to a method for transforming a mixed-flow model water turbine comprehensive characteristic curve into a mixed-flow prototype water turbine operation comprehensive characteristic curve. Background technique [0002] The prototype water turbine refers to the machine in the hydropower station that converts the mechanical energy of the water flow into the mechanical energy of the runner, so that the runner and the main shaft can overcome various resistances and run continuously. It is called the "heart" of the hydropower station. The play of economic benefits plays a decisive role. The prototype turbine is transformed from the model turbine according to the principle of similarity, so the comprehensive characteristic curve of the prototype turbine is also obtained by similar transformation and correction from the comprehensive characteristic curve of the model turbine. ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of large workload, many human influence factors, low work efficiency and drawing precision when converting the comprehensive characteristic curve of the Francis model water turbine into the operation comprehensive characteristic curve of the Francis prototype water turbine in the prior art. The curve can not meet the requirements of unit optimal dispatching, which is not conducive to the safety and economic benefits of the power station.