Corona ring design for a 400 kV non-ceramic insulator

Murawwi, Esam Al; El-Hag, Ayman H.

doi:10.1109/epecs.2011.6126818

Cited by 9 publications

(3 citation statements)

References 8 publications

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“…A majority of high voltage insulators are designed with a corona ring to reduce the electric field surrounding the energised end of the insulator strings. The electric field magnitude along the insulator string surface is not uniform, where the electric field is higher nearer to the conductor (Que and Sebo, 2001;Murawwi and El-Hag, 2011;Thomas, 1944;Bo et al, 2010;Ming et al, 2009). The improper design of the corona ring may cause discharges on its energised end.…”

Section: Introductionmentioning

confidence: 99%

“…A corona ring is made of conductive material and is an opened torus. The outer torus can be enclosed fully or with an opening (Murawwi and El-Hag, 2011;Vancia et al, 2001;Rahimnejad and Mirzaei, 2012). The important ring dimensions in corona ring design are vertical corona ring position along the insulator, diameter of the ring tube and ring diameter (Murawwi and El-Hag, 2011;Vancia et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…The outer torus can be enclosed fully or with an opening (Murawwi and El-Hag, 2011;Vancia et al, 2001;Rahimnejad and Mirzaei, 2012). The important ring dimensions in corona ring design are vertical corona ring position along the insulator, diameter of the ring tube and ring diameter (Murawwi and El-Hag, 2011;Vancia et al, 2001). A larger corona ring is needed when the voltage is higher so that the electric field can be effectively graded (Vancia et al, 2001;Hall, 1993).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Optimisation of corona ring design for composite insulator strings

Aramugam

Illias

Ching

2019

COMPEL

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Purpose The purpose of this paper is to propose an optimum design of a corona ring for insulator strings using optimisation techniques, which are gravitational search algorithm (GSA) and imperialist competitive algorithm (ICA). Design/methodology/approach An insulator string model geometry with a corona ring was modelled in a finite element analysis software, and it was used to obtain the electric field distribution in the model. The design was optimised using GSA and ICA. The variables were the corona ring diameter, ring tube diameter and vertical position of the ring along the insulator string. Findings Using optimisation method, the minimum electric field magnitude on the insulator string with a corona ring design is lower than without using optimisation method. GSA yields better results than ICA in terms of the optimised corona ring design. Practical implications The proposed methods can help in improvement of corona ring design in reducing the electric field magnitude on the energised end of insulator strings. Originality/value A new method to design an optimum corona ring for insulator strings, which is using optimisation methods, has been developed in this work.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%