Improved zinc oxide surge arresters using high voltage gradient 300 V/mm, 400 V/mm ZnO elements

2000 ◽  
Vol 15 (2) ◽  
pp. 569-574 ◽  
Author(s):  
S. Shirakawa ◽  
S. Yamada ◽  
S. Tanaka ◽  
I. Ejiri ◽  
S. Watahiki ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
High Voltage ◽  
Voltage Gradient ◽  
Surge Arresters

Application of high voltage gradient zinc oxide elements to SF/sub 6/ gas insulated surge arresters for 22 kV-765 kV power systems

1999 ◽  
Vol 14 (2) ◽  
pp. 419-424 ◽  
Author(s):  
S. Shirakawa ◽  
I. Ejiri ◽  
S. Watahiki ◽  
N. Iimura ◽  
S. Nakano ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Power Systems ◽  
High Voltage ◽  
Voltage Gradient ◽  
Surge Arresters

A High-Voltage High-Speed AC Switch Based on Controlled Vacuum Surge Arresters

2018 ◽  
Vol 4 (4) ◽  
pp. 4-13
Author(s):  
Vladimir A. SIDOROV ◽  
◽  
Gennady D. DOMASHENKO ◽  
Marat R. AKHMETGAREYEV ◽  
Yurii V. SHCHERBAKOV ◽  
...  
Keyword(s):  
High Voltage ◽  
High Speed ◽  
Surge Arresters

Analytical and Experimental Approach to the Voltage Distribution on Gapless Zinc-Oxide Surge Arresters

1981 ◽  
Vol PER-1 (11) ◽  
pp. 41-42 ◽  
Author(s):  
M. Oyama ◽  
I. Ohshima ◽  
M. Honda ◽  
M. Yamashita ◽  
S. Kojima
Keyword(s):  
Zinc Oxide ◽  
Experimental Approach ◽  
Voltage Distribution ◽  
Surge Arresters

Lightning Protection of Substations and the Effects of the Frequency-Dependent Surge Impedance of Transformers

2013 ◽  
pp. 398-437
Author(s):  
Rafal Tarko ◽  
Wieslaw Nowak
Keyword(s):  
Power Systems ◽  
High Voltage ◽  
Power Transmission ◽  
Electrical Power ◽  
Computer Calculation ◽  
Electrical Power Systems ◽  
Surge Arresters ◽  
Phase Conductors ◽  
Extra High Voltage ◽  
Economic Nature

The reliability of electrical power transmission and distribution depends upon the progress in the insulation coordination, which results both from the improvement of overvoltage protection methods and new constructions of electrical power devices, and from the development of the surge exposures identification, affecting the insulating system. Owing to the technical, exploitation, and economic nature, the overvoltage risk in high and extra high voltage electrical power systems has been rarely investigated, and therefore the theoretical methods of analysis are intensely developed. This especially applies to lightning overvoltages, which are analyzed using mathematical modeling and computer calculation techniques. The chapter is dedicated to the problems of voltage transients generated by lightning overvoltages in high and extra high voltage electrical power systems. Such models of electrical power lines and substations in the conditions of lightning overvoltages enable the analysis of surge risks, being a result of direct lightning strokes to the tower, ground, and phase conductors. Those models also account for the impulse electric strength of the external insulation. On the basis of mathematical models, the results of numerical simulation of overvoltage risk in selected electrical power systems have been presented. Those examples also cover optimization of the surge arresters location in electrical power substations.

Effects of SiO2/Cr2O3 ratios on microstructures and electrical properties of high voltage gradient ZnO varistors

2019 ◽  
Vol 30 (13) ◽  
pp. 12113-12121 ◽  
Author(s):  
Xuejun Ruan ◽  
Xin Ren ◽  
Wenting Zhou ◽  
Xi Xu ◽  
Xin Wang ◽  
...  
Keyword(s):  
Electrical Properties ◽  
High Voltage ◽  
Voltage Gradient ◽  
Zno Varistors
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