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Device and method for regeneration of voltage equalizing electrode of converter valve

A voltage equalizing electrode and regeneration device technology, applied in the field of converter valves, can solve problems such as reducing the working area of ​​electrodes, electrolytic corrosion of metal electrical equipment, damage to converter valve equipment, etc., and achieve significant safety and economic benefits

Active Publication Date: 2016-08-17
STATE GRID CORP OF CHINA +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] After the HVDC converter valve has been in operation for 1 to 3 years, the surface of the pressure equalizing electrode installed on the inner cooling water pipeline of the converter valve is generally covered by sediment, and the sediment reduces the working area of ​​the electrode, resulting in metal electrical contact with the inner cooling water. Severe electrolytic corrosion and electrical flashover occurred in the equipment, and the sediment was easy to fall off and block the waterway under the vibration of the valve tower and the disturbance of the internal cooling water, resulting in overheating and damage to the electrical equipment
[0003] Electrode surface deposits, the current treatment method is: the converter valve is shut down once a year, the electrodes are manually extracted, and the electrode surface deposits are removed by wiping, smashing, etc., which not only consumes manpower and material resources, but also manually removes electrode surface deposits It is easy to cause damage to other equipment of the converter valve. The most critical thing is the outage of the converter valve, which results in loss of load transmission and huge economic losses.

Method used

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  • Device and method for regeneration of voltage equalizing electrode of converter valve
  • Device and method for regeneration of voltage equalizing electrode of converter valve
  • Device and method for regeneration of voltage equalizing electrode of converter valve

Examples

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Effect test

Embodiment 1

[0035]The electrolyte solution tank 52 is filled with electrolyte solution (carbonic acid solution with a volume concentration of 0.01% and hydrogen peroxide solution with a volume concentration of 0.5%). The electrolyte solution is injected into the ion exchange bypass through the metering pump 51, and then flows into the cooling water circulation system to control the cooling water circulation. The conductivity of the internal cooling water in the system is not greater than 0.5 μS / cm; the ion exchanger 41 is connected in series with the ion exchange bypass 4, and the interior of the ion exchanger 41 is filled with 50% volume of hydrogen-type resin and 50% volume of hydrogen-oxygen type resin. Mixed resin composed of resin, adjust the first regulating valve 71 and the second regulating valve 72, control the flow rate flowing through the ion exchanger 41, filter 1% of the circulating water volume of the inner cooling water per hour, and put the ion exchanger 41 into operation. ...

Embodiment 2

[0037] Electrolyte solution (0.01% ammonium carbonate solution and 1% hydrogen peroxide solution) is installed in the electrolyte solution tank 52, and the electrolyte solution is injected into the ion exchange bypass 4 through the metering pump 51, and then flows into the cooling water circulation system to control the cooling water circulation system The conductivity of the inner cooling water is not greater than 0.5 μS / cm; the ion exchanger 41 is connected in series with the ion exchange bypass 4, and the lower part of the ion exchanger 41 is filled with 60% volume of 1:1 hydrogen resin and hydroxyl resin The mixed resin composed, the middle part is filled with 20% volume of hydrogen-oxygen resin, the top is filled with 20% volume of hydrogen-type resin, and the first regulating valve 71 and the second regulating valve 72 are adjusted to control the flow of the ion exchanger 41. After filtering 1% of the circulating water volume of the internal cooling water per hour, the io...

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Abstract

The invention discloses a converter valve voltage-sharing electrode regeneration device and method. The device comprises an ion exchange bypass connected with an internal cooling water circulation waterway in a converter valve in parallel. An ion exchanger is connected to a pipeline between an inlet and an outlet of the ion exchange bypass in series. An inlet of the ion exchanger is provided with a first conductivity meter, and an outlet of the ion exchanger is provided with a second conductivity meter. An inlet of a metering pump is connected with an electrolyte solution tank, and an outlet of the metering pump is communicated with a pipeline between the second conductivity meter and the outlet of the ion exchange bypass. The outlet of the metering pump is provided with a third conductivity meter. According to the converter valve voltage-sharing electrode regeneration device and method, by adding electrolyte into internal cooling water, the conductivity of the internal cooling water and the gassing reaction of an electrode can be controlled, deposit generated on the surface of the electrode can be removed by generated gas and is finally removed through adsorption of ion exchange resin, and thus the electrode can be regenerated.

Description

technical field [0001] The invention relates to the technical field of converter valves, in particular to a regeneration device and method for a pressure equalizing electrode of a converter valve. Background technique [0002] After the HVDC converter valve has been in operation for 1 to 3 years, the surface of the pressure equalizing electrode installed on the inner cooling water pipeline of the converter valve is generally covered by sediment, and the sediment reduces the working area of ​​the electrode, resulting in metal electrical contact with the inner cooling water. Severe electrolytic corrosion and electrical flashover occurred in the equipment, and the deposits were easy to fall off and block the waterway under the vibration of the valve tower and the disturbance of the internal cooling water, resulting in overheating and damage to the electrical equipment. [0003] Electrode surface deposits, the current treatment method is: the converter valve is shut down once a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00
CPCB08B7/00
Inventor 丁德谷永刚苏耕闫爱军白晓春吴健薛军宋元峰孙少晗郭安祥林一凡王建平
Owner STATE GRID CORP OF CHINA