A New Method for Evaluating Fault Reduction Factor in HV Cable System

Author

Shi, Yin Xia ; Niu, Hai Qing ; Zhang, Yao ; Yi, Ze Pei ; Wang, Xiao Bing ; Liu, Yi Gang

Author_Institution

Dept. of Electr. Eng., South China Univ. of Technol., Guangzhou

fYear

2005

fDate

2005

Firstpage

1

Lastpage

5

Abstract

Grounding fault current distribution and the reduction factor of a power cable is an important parameter for the design of substation ground grid, the correct estimation of the safety conditions (step and touch voltages) in the supplied substation and the interference to the communication system nearby. In this paper, a simplified equivalent model is presented for three single-core cable sheaths, which are two-ends grounded. Both of the cable sheaths with or without applied cross-bonding connection are discussed here. Based on this, the paper presents an original analytical procedure for determination the ground fault reduction factor when a ground fault happens in the substation supplied by HV cable network. The method is proved to be a practical and precise one for evaluating the ground current distribution and the reduction factor in HV cable system

Keywords

cable sheathing; current distribution; earthing; electrical safety; fault currents; power cables; substations; HV power cable; cable sheath; communication system interference; cross-bonding connection; fault current distribution; reduction factor; safety; substation ground grid; Cable shielding; Current distribution; Fault currents; Grounding; Interference; Power cables; Power system modeling; Safety; Substations; Voltage; Electromagnetic coupling; cable; current distribution; grounding; power network; short circuit currents;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exhibition: Asia and Pacific, 2005 IEEE/PES

Conference_Location

Dalian

Print_ISBN

0-7803-9114-4

Type

conf

DOI

10.1109/TDC.2005.1547017

Filename

1547017