Aluminum Grading Rings Design

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The Optimization of Grading Ring Design for 800 kV UHVDC Transmission Lines

July 19, 2021

ABSTRACT: The three-dimensional finite element method is used to calculate the electric field of insulator strings for ±800 kV UHV DC transmission lines. After the comparison of electric field distribution and voltage distribution with different ring diameter, tube diameter and shielding depth, the dimension and position of grading ring is recommended. The ball-gap method is …

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How To Design Aluminum Grading Rings For High Voltage Insulators

February 28, 2021

Aluminum grading rings are similar to corona rings, but they encircle high voltage insulators rather than HV conductors. The aluminum grading rings surround the end of the high voltage insulators next to the high voltage conductor. It reduces the gradient at the end, resulting in a more even voltage gradient along the high voltage insulator. Although they …

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