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Method for optimizing the efficiency of Kaplan turbine by taking rotating speed and blade opening degree as variables

A blade opening and type water turbine technology, which is applied in design optimization/simulation, geometric CAD, etc., can solve the problem that the unit cannot be coordinated to the optimal efficiency, and achieve the effect of improving economy and efficiency

Active Publication Date: 2020-03-17
XIAN UNIV OF TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for optimizing the efficiency of a paddle-type water turbine with the rotating speed and blade opening as variables, which solves the problems existing in the prior art when the paddle-type water turbine generator set operates at variable speeds. The problem that the unit cannot be coordinated to the optimal efficiency caused by the model difference

Method used

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  • Method for optimizing the efficiency of Kaplan turbine by taking rotating speed and blade opening degree as variables
  • Method for optimizing the efficiency of Kaplan turbine by taking rotating speed and blade opening degree as variables
  • Method for optimizing the efficiency of Kaplan turbine by taking rotating speed and blade opening degree as variables

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Embodiment

[0034] When the variable speed operating condition of the rotary paddle turbine changes within a small range, the relationship between the efficiency of the unit, the speed of the unit and the opening of the blades satisfies the single-pole space surface, as shown in figure 2 shown.

[0035] Step 1. Assuming that the initial speed and blade opening of the real machine under the current water head and output of the unit are obtained from the association relationship of the rotary paddle turbine model, the corresponding initial operating point of the real machine is figure 2 Point A in .

[0036] Step 2. Adjust the blade opening of the unit while keeping the speed constant, then the operating point moves on curve 1, and curve 1 is the blade optimization curve. At this time, the relationship between efficiency and blade opening is as follows: image 3 shown. Assuming that the blade opening is changed according to a certain step at the initial moment, the blade opening of the ...

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Abstract

The invention discloses a method for optimizing the efficiency of a Kaplan turbine by taking a rotating speed and a blade opening degree as variables. The method includes: obtaining the initial rotating speed and the initial blade opening degree of a real machine according to the water turbine model association relationship, and on the basis, respectively changing the rotating speed and the bladeopening degree of the unit and judging the efficiency change condition of the water turbine, so as to obtain the optimal rotating speed or the optimal blade opening degree. The method solves the problem that the variable-speed operation of the Kaplan turbine cannot be coordinated to the optimal efficiency, the variable-speed operation efficiency of the Kaplan turbine is improved, and the operationstability of a unit is improved.

Description

technical field [0001] The invention belongs to the technical field of water turbine adjustment methods, and relates to a method for optimizing the efficiency of a paddle type water turbine with the rotation speed and blade opening as variables. Background technique [0002] When the paddle turbine is running at variable speed, the efficiency of the turbine is related to the speed of the unit and the opening of the blades at the same time under a certain water head and power. The characteristic of optimal efficiency cannot accurately reflect the operation of the real machine, resulting in the inability to coordinate to the optimal efficiency when the turbine is running at variable speed, which reduces the economical efficiency of the power station and the operational stability of the unit. Contents of the invention [0003] The purpose of the present invention is to provide a method for optimizing the efficiency of a paddle-type water turbine with the rotating speed and bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20G06F30/17
Inventor 门闯社南海鹏罗兴锜冯建军郭鹏程张松松高春阳李斐斐李国凤
Owner XIAN UNIV OF TECH
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