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Cold water simulation anti-corrosion system inside high-voltage direct-current converter valve

A high-voltage direct current, converter valve technology, applied in the field of electric power engineering, can solve problems such as metal corrosion, and achieve the effect of inhibiting metal corrosion and simple system structure

Inactive Publication Date: 2018-04-24
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides a simulated anti-corrosion system for cooling water in a high-voltage direct current converter valve, providing a research basis for solving the problem of metal corrosion in the cooling water system in the valve in actual production

Method used

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  • Cold water simulation anti-corrosion system inside high-voltage direct-current converter valve
  • Cold water simulation anti-corrosion system inside high-voltage direct-current converter valve
  • Cold water simulation anti-corrosion system inside high-voltage direct-current converter valve

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Embodiment Construction

[0028] see figure 1 , is a structural schematic diagram of a simulated anti-corrosion system for internal cooling water of a HVDC converter valve provided in an embodiment of the present application. Depend on figure 1 It can be seen that the system includes a thyristor 1 and a cooler 2 for cooling the thyristor 1, and also includes a voltage equalizing electrode 3, a circulating water pump 4, an expansion tank 5 and a controller 6;

[0029] The cooler 2 communicates with the equalizing electrode 3 and the circulating water pump 4 through pipelines to form a circulation pipeline 7;

[0030] The circulation line 7 is in communication with the expansion tank 5; the circulation line 7 contains deionized water 8 containing ethylene glycol;

[0031] The expansion water tank 5 is provided with a detection instrument 9 for detecting the concentration of ethylene glycol in the deionized water 8, and is also provided with a liquid addition device 10 for adding ethylene glycol solutio...

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Abstract

The embodiments of the present invention provide a cold water simulation anti-corrosion system inside a high-voltage direct-current converter valve. The system includes a thyristor, a cooler, a voltage equalizing electrode, a circulating water pump, an expansion water tank, and a controller; the cooler is communicated with the voltage equalizing electrode and the circulating water pump through a pipeline, so that a circulation pipeline can be formed; the circulation pipeline is connected with the expansion water tank; a detection instrument for detecting the concentration of ethylene glycol indeionized water in the circulation pipeline is arranged in the expansion water tank; a liquid adding device used for adding an ethylene glycol solution to the expansion water tank is arranged in theexpansion water tank; and when the current concentration of the ethylene glycol in the deionized water is lower than a preset threshold, the controller controls the liquid adding device to add the ethylene glycol solution to the expansion water tank according to the current concentration of the ethylene glycol and the amount of circulating water. The system provided by the present invention is ofstructural simplicity. According to the system, the ethylene glycol is added to the deionized water, so that the metal corrosion of the cold water system in the high-voltage direct-current valve can be effectively suppressed, and a basis can be provided for solving the problem of the metal corrosion of an inside-valve cold water system in actual production.

Description

technical field [0001] The present application relates to the technical field of electric power engineering, in particular to a simulated anti-corrosion system for cooling water in a high-voltage direct current converter valve. Background technique [0002] Converter valve is the core equipment of HVDC transmission project. The cooling system of the diverter valve is divided into the cooling water system inside the valve and the cooling water system outside the valve. Among them, the cooling water system inside the valve is a special system "belonging to the auxiliary but in the absolute core position in practice". The cooling water system inside the valve receives and transfers the heat generated by the thyristors in the production process of the converter station to the cooling water system outside the valve for heat dissipation, so as to ensure that the operating temperature of the thyristors is stable at an appropriate value. Therefore, if the cooling system of the conv...

Claims

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Application Information

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IPC IPC(8): H02M1/00H05K7/20C02F1/42
CPCH02M1/00C02F1/42H05K7/20927
Inventor 何潇郭新良夏桓桓周金龙李宗红
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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