Title :
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
fDate :
29 Oct-2 Nov 1989
Abstract :
An approach is developed which can be used to calculate the sparking and residual voltages Vs and Vr, or the ratio between them, from the corner values Vp and Vq 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+Cc/Cb. 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. Vs and V r, or Vr/Vs, 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;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 1989. Annual Report., Conference on
Conference_Location :
Leesburg, VA
DOI :
10.1109/CEIDP.1989.69530
