Discharge path controllable grading ring
A discharge path and voltage equalizing ring technology, which is applied in the field of voltage equalizing rings, can solve the problems of uncontrollable discharge path, poor economy, and increased gap distance, etc., and achieve economical and reliable design effects
Active Publication Date: 2018-09-28
CHINA ELECTRIC POWER RES INST +3
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Problems solved by technology
In the valve hall or DC field of UHV projects, due to the uncontrollable discharge path, in order to ensure the safety of inspectors, the current measures or methods are to further increase the gap distance or build shielded inspection walkways in the areas where inspectors pass, but the above less economical
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[0029] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0030] A grading ring with controllable discharge path, such as Figure 1 to Figure 4 shown, including:
[0031] The voltage equalizing ring body 1 is a ring-shaped and smooth-surfaced hollow ring hardware; the voltage equalizing ring body 1 is arranged on the top of a post insulator 9 placed vertically on the ground, and the post insulator 9 is columnar , the function of the equalizing ring body 1 in electrical equipment is generally to equalize pressure or prevent corona at the end; the surface of the equalizing ring body 1 in this embodiment is smooth and can normally play the role of equalizin...
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Abstract
The invention relates to the field of high-voltage safety, and particularly relates to a discharge path controllable grading ring. According to the discharge path controllable grading ring, a gradingring body is a hollow ring body and positioned at the top of a columnar insulator arranged on the ground; a discharge hole is formed on the outer ring wall of the hollow ring body; a probe is arrangedin the discharge hole; an insulating pneumatic loop comprises a cylinder, a pressure pipeline and an air pump which are sequentially connected; the cylinder is fixedly arranged inside the hollow ringbody and consists of a cylinder barrel, an end cover, a piston, an air intake and a probe connection rod; the piston is connected with the probe connection rod and is connected with the probe throughthe center position of the end cover and the discharge hole; the air pump is arranged outside the hollow ring body and provides power for the insulating pneumatic loop; the pressure pipeline is connected with the air pump and the cylinder; and a system control cabinet is electrically connected with the air pump. According to the discharge path controllable grading ring disclosed by the invention,when touring personnel enters a valve hall, a direct current field and an alternating current field and is close to electrical equipment, safety of the touring personnel can be ensured by controllinga discharge path.
Description
technical field [0001] The invention relates to the field of high voltage safety, in particular to a voltage equalizing ring with a controllable discharge path. Background technique [0002] With the improvement of the voltage level, especially the construction of UHV projects, on the one hand, the overvoltage level of the system is getting higher and higher, the insulation distance required for power transmission and transformation equipment is getting bigger and bigger, and the required air gap distance is also getting bigger and bigger. On the other hand, the size of fittings at the end of power transmission and transformation equipment is getting larger and larger. Taking ±1100kV DC as an example, the diameter of the largest equalizing ring has reached 3.8m, and the diameter of the equalizing ball has exceeded 2.5m. The discharge characteristics of metal-like tools to the gap formed by the surrounding grounding body show the characteristics of high discharge voltage, ran...
Claims
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IPC IPC(8): H01B17/42H01B17/44H01B17/14
CPCH01B17/145H01B17/42H01B17/44
Inventor 丁玉剑耿江海李鹏殷禹姚修远周军黄瑞平花广如姜德喜刘玉胜
Owner CHINA ELECTRIC POWER RES INST