TY - GEN
T1 - Surface charge accumulation on the cone-type insulator under DC voltage
AU - Wang, Q.
AU - Zhang, G. X.
AU - Wang, X. X.
AU - Wang, B.
PY - 2010
Y1 - 2010
N2 - Surface charge accumulation on cone-type insulators is a remarkable phenomenon in Gas Insulated Line (GIL), especially under DC voltage. It may lead to a considerable reduction of the flashover voltage of insulators. For this respect, this paper focuses on the surface charge distribution on the real insulator after applying DC voltage. In order to study this phenomenon, a set of device for measuring surface voltages on the insulator is designed, base on the electrostatic probe method. After applying different DC voltage amplitudes to the cone-type insulator, the surface voltage distributions, which reflect charge distributions to some extent, are measured by an electrostatic probe in SF 6 gas. Despite of the axial symmetry of the insulator, the measurement results show that the charge distribution is nonaxisymmetrical. The negative charge accumulates mostly under positive DC voltage. On the other hand, no apparent positive charge accumulation is observed on the surface. In areas which are close to electrode, the measured voltage amplitudes are much higher than outer areas.
AB - Surface charge accumulation on cone-type insulators is a remarkable phenomenon in Gas Insulated Line (GIL), especially under DC voltage. It may lead to a considerable reduction of the flashover voltage of insulators. For this respect, this paper focuses on the surface charge distribution on the real insulator after applying DC voltage. In order to study this phenomenon, a set of device for measuring surface voltages on the insulator is designed, base on the electrostatic probe method. After applying different DC voltage amplitudes to the cone-type insulator, the surface voltage distributions, which reflect charge distributions to some extent, are measured by an electrostatic probe in SF 6 gas. Despite of the axial symmetry of the insulator, the measurement results show that the charge distribution is nonaxisymmetrical. The negative charge accumulates mostly under positive DC voltage. On the other hand, no apparent positive charge accumulation is observed on the surface. In areas which are close to electrode, the measured voltage amplitudes are much higher than outer areas.
KW - GIL
KW - cone-type insulator
KW - electrostatic probe method
KW - measurement
KW - surface charge
UR - http://www.scopus.com/inward/record.url?scp=80051749773&partnerID=8YFLogxK
U2 - 10.1109/IPMHVC.2010.5958386
DO - 10.1109/IPMHVC.2010.5958386
M3 - Conference contribution
AN - SCOPUS:80051749773
SN - 9781424471294
T3 - Proceedings of the 2010 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2010
SP - 430
EP - 433
BT - Proceedings of the 2010 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2010
T2 - 2010 IEEE International Power Modulator and High Voltage Conference, IPMHVC 2010
Y2 - 23 May 2010 through 27 May 2010
ER -