Determination of sparking voltage and residual voltage of a void included in an electrical insulation system

Author

Peiyu, Ren ; Guangming, Zhong

Author_Institution

Dept. of Electr. Eng., Xi´´an Jiaotong Univ., China

fYear

1989

fDate

29 Oct-2 Nov 1989

Firstpage

99

Lastpage

104

Abstract

An approach is developed which can be used to calculate the sparking and residual voltages V_s and V_r, or the ratio between them, from the corner values V_p and V_q in a parallelogram. From a theoretical analysis of the parallelogram method, which is used for partial-discharge measurement, the width of the parallelogram is equal to the sum of the partial discharge inception voltage plus the voltage that equals the residual voltage of a void multiplied by a factor of 1+C_c/C_b. If the sparking voltage is approximately equal to the residual voltage, the width of the parallelogram is approximately equal to the partial-discharge inception voltage multiplied by 2√2. V_s and V _r, or V_r/V_s, can also be calculated from the corner parameters of parallelograms

Keywords

electric breakdown of solids; insulation testing; partial discharges; sparks; voids (solid); corner parameters; electrical insulation system; inception voltage; parallelogram method; partial-discharge; residual voltages; sparking voltage; theoretical analysis; void; Capacitance measurement; Dielectrics and electrical insulation; Electric variables measurement; Electrodes; Equations; Insulation testing; Low voltage; Partial discharge measurement; Partial discharges; System testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Insulation and Dielectric Phenomena, 1989. Annual Report., Conference on

Conference_Location

Leesburg, VA

Type

conf

DOI

10.1109/CEIDP.1989.69530

Filename

69530