Method for evaluating throughflow characteristic of insulated water diversion pipes of generator stator winding

A technology of generator stator and flow characteristics, applied in the direction of machine/structural component testing, measuring devices, instruments, etc.

Active Publication Date: 2017-10-24
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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Problems solved by technology

[0005] In order to solve the problem of evaluating the flow characteristics of the insulating water pipes of the existing large generator stator windings, the present invention provides a method for evaluating...

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  • Method for evaluating throughflow characteristic of insulated water diversion pipes of generator stator winding
  • Method for evaluating throughflow characteristic of insulated water diversion pipes of generator stator winding
  • Method for evaluating throughflow characteristic of insulated water diversion pipes of generator stator winding

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Embodiment

[0026] A method for evaluating the flow characteristics of generator stator winding insulation water diversion pipes, which measures the outlet water temperature of each insulation water diversion pipe of the generator stator winding under different stator cooling water inlet temperatures, and calculates the average value and standard deviation value as an evaluation Characteristic parameters of flow characteristics of generator stator winding insulation water pipe.

[0027] Assuming that there is no blockage in the n insulating water pipes of the generator stator winding, the cooling water m entering the stator winding is evenly distributed to each insulated water pipe, and the amount of water distributed is m / n;

[0028] Set the temperature of the cold water inlet as T 1 , under the heat exchange, stabilize for a period of time, the outlet water temperature of each insulated water diversion pipe is T 11 , T 12 ,...,T 1n , the value difference is small, ignoring the measur...

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Abstract

The invention discloses a method for evaluating the throughflow characteristic of insulated water diversion pipes of a generator stator winding. An evaluation method in which an ultrasonic flow meter is adopted to measure the flow is mainly adopted at present, and the method must be executed after the unit shuts down and the tester enters a generator stator. The water outlet temperature of each insulated water diversion pipe of the generator stator winding under different water inlet temperatures of stator cooling water is measured, and the mean and standard deviation thereof are calculated as characteristic parameters for evaluating the throughflow characteristic of the insulated water diversion pipes of the generator stator winding. The method can be used for evaluating the throughflow characteristic of the insulated water diversion pipes of the generator stator winding in capital construction debugging or overhauling of a large-sized unit generator, thus making reasonable arrangement for subsequent safety operation and overhauling measures.

Description

technical field [0001] The invention relates to the field of quality evaluation of the flowability of a generator stator cooling water system, in particular to a method for evaluating the flow characteristics of a large generator stator winding insulation water diversion pipe based on the temperature standard deviation. Background technique [0002] With the requirements of energy saving and emission reduction and the advancement of technology, generators are developing towards high parameters and large capacity, which puts forward higher requirements for the evaluation of the flow characteristics of the generator stator cooling water system. [0003] In the safety evaluation of each insulating water pipe of the generator stator winding, its flow characteristics are the main content. The large temperature difference of the outlet water of the insulation water pipe of the generator stator winding sometimes occurs, which is mostly caused by the failure of the generator stator ...

Claims

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Application Information

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IPC IPC(8): G01M99/00
CPCG01M99/008
Inventor 李卫军吴文健应光耀胡洲顾正皓蔡文方王函弘
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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