Test detection system and method for scaling of voltage-sharing electrode of high-voltage direct current converter valve

Abstract

The invention discloses a test detection system and method for scaling of a voltage-sharing electrode of a high-voltage direct current converter valve. The system comprises a voltage-sharing electrodescaling inhibiting device, a voltage-sharing electrode scaling detection device, a central control and processing device and a scaling trend detection and analysis background, wherein the voltage-sharing electrode scaling detection device is used for adjusting the water environment of cooled water in the mounting position of the voltage-sharing electrode and inhibiting scaling of the voltage-sharing electrode; the voltage-sharing electrode scaling detection device is used for detecting the PH value, conductivity, oxidoreduction reaction potential, AL ion concentration, CL ion concentration and leakage current of the cooled water in the mounting position of the voltage-sharing electrode; the central control and processing device and the scaling trend detection and analysis background calculate the scaling trend of the voltage-sharing electrode and judges the effectiveness of the voltage-sharing electrode scaling inhibiting device in inhibiting scaling of the voltage-sharing electrode.The test detection system and method can evaluate the scaling trend of the voltage-sharing electrode and the scaling inhibiting effect of each scaling inhibiting device and can be widely applied to annual overhaul, fault analysis and system optimization of the high-voltage direct current converter valve.

Description

technical field [0001] The invention relates to the technical field of electric power engineering, in particular to a fouling test and detection system and method for equalizing electrodes of high-voltage direct current converter valves. Background technique [0002] Scaling of valve-cooled equalizing electrodes is common in high-voltage direct current transmission projects. Scaling of equalizing electrodes will lead to a decrease in the conductivity of the equalizing electrodes and the scale will fall off and block the cooling system of the converter valve. In severe cases, it will lead to DC blocking. At present, in view of scaling electrodes, most of them focus on strengthening the control and management of the valve cooling system. At the same time, combined with the descaling of equalizing electrodes during the maintenance period of the direct current transmission project, the production due to scaling is basically avoided. Accidents have occurred, but the fouling situa...

AI Technical Summary

Problems solved by technology

[0002] In HVDC power transmission projects, scaling of the valve-cooled equalizing electrodes is common. Scaling of the equalizing electrodes will lead to a decrease in the conductivity of the equalizing electrodes and the scale will fall off and block the cooling system of the converter valve. In severe cases, it will lead to DC blocking

At present, in view of scaling electrodes, most of them focus on strengthening the control and management of the valve cooling system. At the same time, combined with the descaling of equalizing electrodes during the maintenance period of the direct current transmission project, the production due to scaling is basically avoided. Accidents happen, but the fouling situation has not been completely resolved

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