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On-line monitoring and evaluation method of heat exchange efficiency for water cooling system of diverter valve

A technology of heat exchange efficiency and water cooling system, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as research on thermal model of water cooling system without commutation and conversion flow valve, and achieve safe and stable operation Effect

Active Publication Date: 2017-04-12
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, there is no domestic research on the thermal model of the water-cooling system of the converter converter valve.

Method used

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  • On-line monitoring and evaluation method of heat exchange efficiency for water cooling system of diverter valve
  • On-line monitoring and evaluation method of heat exchange efficiency for water cooling system of diverter valve
  • On-line monitoring and evaluation method of heat exchange efficiency for water cooling system of diverter valve

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Experimental program
Comparison scheme
Effect test

Embodiment

[0022] An online heat exchange efficiency monitoring and evaluation method for a water cooling system of a diverter valve, characterized in that it comprises the following steps:

[0023] 1) Construct the thermal model of the converter valve cooling system;

[0024] 2) Analyze the heat transfer performance of the converter valve under different operating conditions through the established model;

[0025] 3) Analyze various heat and mass transfer coefficients by selecting the classical heat transfer coefficient relational formula, heat mass comparison and falling film theory;

[0026] 4) Analyze the influence of various heat and mass transfer coefficients on the heat transfer performance of the converter valve.

[0027] The various heat and mass transfer coefficients mentioned include outdoor meteorological parameters, internal cooling water flow and DC transmission load.

[0028] The thermal model of the diverter valve cooling system includes a diverter valve model, a coolin...

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Abstract

The invention relates to an online monitoring and assessment method for heat exchange efficiency of a water-cooling system of a converter valve. The online monitoring and assessment method comprises the following steps: (1) building a thermotechnical model of a valve-cooling system of the converter valve; (2) analyzing the heat exchange performance of the converter valve under different operation conditions through the built model; (3) analyzing all heat and mass transfer coefficients by selecting a classical heat exchange coefficient relation, heat-mass transfer analogy and the falling film theory; (4) analyzing the influences of all the heat and mass transfer coefficients on the heat exchange performance of the converter valve. Compared with the prior art, the online monitoring and assessment method disclosed by the invention has the advantages that the converter valve can reliably and stably run, and the like.

Description

technical field [0001] The invention relates to a heat exchange efficiency monitoring and evaluation technology, in particular to an online heat exchange efficiency monitoring and evaluation method for a water cooling system of a diverter valve. Background technique [0002] Up to now, 15 long-distance super- and UHV DC transmission lines and 3 back-to-back converter stations have been built and put into operation in China. According to the plan, 15 DC projects will be started during the "12th Five-Year Plan" period, with a total conversion capacity of 230 million kW and a total line length of 25,000 km, including 13 ±800kV and 1 ±1100kV DC projects. The thyristor converter valve is the core component of the converter station. During normal operation, high current generates high heat, causing the temperature of the thyristor to rise sharply. If the thyristor is not cooled effectively, the thyristor will be burned out. The water cooling system of the diverter valve realizes ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 傅坚刁冠勋刘斯佳苏丰刘娇杨猛
Owner STATE GRID CORP OF CHINA
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