• M.RAJA NAYAK
• s kiran kumar
• p v s aditya

: Insulators for Extra High Voltages (EHV), exceeding 200 kV, may have grading rings installed at their terminals. The design and testing of the HV electrodes (Corona rings, Bus conductors etc.) is most important because high voltage fields affect the performance of equipments with regard to voltage stresses near the HV ends and also influence the voltage distribution. This paper describes the optimization of electric field and potential distribution along Station post insulators of rating 420kV. A number of different corona ring geometries were compared. The effect of changing ring diameter, overall diameter and placement along the insulator were investigated. Modelling and simulation of high voltage electrodes for the EHV bus post insulators is done by using coulomb 3D software, which used Boundary Element Method (BEM). The results of the simulation studies, carried out to optimize the High Voltage Electrodes (Corona rings, Bus conductors etc.) geometries that have to be provided at the live end of 400kV station post insulators, are presented. The corona onset gradients for the various configurations of the Grading ring were calculated and compared with the maximum gradients obtained in the simulation studies. .

"Optimization of High Voltage Electrodes for Post Insulators used in 400kV Transmission System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 12, page no.296-301, December-2018, Available :http://www.jetir.org/papers/JETIR1812243.pdf

"Optimization of High Voltage Electrodes for Post Insulators used in 400kV Transmission System", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 12, page no. pp296-301, December-2018, Available at : http://www.jetir.org/papers/JETIR1812243.pdf