Method for detecting corrosion performance of direct current grounding electrode

Abstract

The invention discloses a method for detecting the corrosion performance of a direct-current grounding electrode, and belongs to the field of high-voltage tests. The method comprises the steps of: serving an electrode A of a direct-current grounding electrode as a flow injection electrode, serving an electrode B as a backflow electrode, performing pretreatment according to the material standard, and sealing the connecting position of a drainage wire and the electrodes through an insulation sleeve; buring the electrode A in an actual soil environment, determining a potential compensation point of the electrode A, and measuring the grounding resistance of the electrode A; buring the electrode B in an actual soil environment which is two times away from the potential compensation point of the electrode A; connecting the electrode A as an anode and the electrode B as a cathode with a direct-current power supply, and injecting current into the electrode A and the electrode B within a preset time; and cleaning according to a preset cleaning method after the through-flow is finished, removing corrosion products, drying and measuring the mass of the electrode, determining the corrosion rate of the electrode A and the electrode B by combining the surface area of the electrode, the through-flow time and the material density, and determining the corrosion performance of the direct-current grounding electrode through the corrosion rate.

Description

technical field [0001] The invention relates to the field of high-voltage testing, and more specifically, to a method for detecting the corrosion performance of a DC ground electrode. Background technique [0002] The ground electrode of the HVDC converter station is an important part of the HVDC transmission system and plays an irreplaceable role in the operation of the HVDC transmission system. [0003] With the rapid development of the world economy, the demand for electricity has increased rapidly, and the direct current transmission project has developed rapidly. The safe and stable operation of the direct current transmission system has become more and more important. When the DC grounding electrode is in the unipolar ground operation mode or under the condition of unipolar fault and maintenance, the grounding electrode will flow a DC current up to thousands of amperes, which will cause electrolytic corrosion of the grounding electrode. Especially the ground electrode...

AI Technical Summary

Problems solved by technology

The current density, medium environment, and flow time of the electrode in this method are different from the actual situation, and the accuracy of the corresponding corrosion rate needs to be further improved, and because in a limited space, the change of the corrosion product on the medium environment will also affect original corrosion rate

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