Experimental device and method for analyzing temperature rise characteristics of coke for grounding electrode

Abstract

The invention provides an experimental device and method for analyzing temperature rise characteristics of coke for a grounding electrode. The device comprises a constant-current power supply and a cylinder body, wherein the upper end of the cylinder body is covered with an upper metal cover, the lower end of the cylinder body is covered with a lower metal cover, the positive electrode of the constant-current power supply is connected with the upper metal cover through a wire, and the negative electrode of the constant-current power supply is connected with the lower metal cover through a wire. According to the device and the method, the contact resistance between the voltage measuring electrode and the coke is greatly reduced, and the stability of the voltage of a to-be-tested product isfurther improved, so that the resistivity of the coke in the temperature rise process is accurately obtained, the change curve of the resistivity of the coke sample along with the temperature is obtained, the content of various substance components in the coke sample after temperature rise can be obtained, and a method and a basis are provided for researching the aging process of the coke.

Description

technical field [0001] The invention belongs to the field of direct current transmission, and in particular relates to an experimental device and method for analyzing the temperature rise characteristics of coke used for ground electrodes, which is suitable for analyzing the temperature rise characteristics of coke. Background technique [0002] The distribution characteristics of my country's energy and demand determine that my country needs to build large-capacity power transmission channels to transmit electric energy. Due to its advantages in economy and operation control, direct current transmission has also been vigorously developed. Compared with EHV AC transmission, DC transmission has obvious advantages. In terms of operation control, DC transmission can connect several regional power grids that are not synchronized, which solves the difficulty of real-time power flow control in large power grids, and enhances the stability, flexibility and reliability of the power...

AI Technical Summary

Problems solved by technology

After excavation inspection, investigation and research, it was found that the cause of the accident was mainly due to the gradual aging of the coke around the ground electrode during operation. With the increase of the service life, the electrolytic corrosion rate of the ground electrode metal increased, which eventually led to the ground electrode burning accident.

Temperature rise is an important cause of coke aging. At present, there is no very effective method to analyze the temperature rise characteristics of coke, and then study its aging process.

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