Abnormality of Electric Field at a Wedge-like Edge of a Conductor or a Dielectric Interface and its Relaxation Methods

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  • Kawamoto Tadashi
    Electric Power Engineering Research Lab., Central Research Institute of Electric Power Industry (CRIEPI)
  • Takuma Tadasu
    Nuclear Technology Research Lab., Central Research Institute of Electric Power Industry (CRIEPI)

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  • くさび形かど点の電界異常性とその緩和方法
  • クサビ ガタ カ ドテン ノ デンカイ イジョウセイ ト ソノ カンワ ホウホウ

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Abstract

Abnormal electric field appears at a wedge-like edge of a conductor(electrode) or a dielectric interface, which usually becomes infinitely high. This paper analyses the electric field near such an edge by the analytical variable separation method and by the numerical one of the charge simulation method. The analysis focuses on the special conditions where the electric field becomes zero at an edge. These conditions are important for the insulation design to suppress the discharge inception at such edges of conductors and dielectric interfaces.

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