Lightning arrester choosing for 10kV side with no load of 220kV main transformer

Author

Qinghao Wang ; Tianshi Wang ; Ying Yang ; Chunzhong Zhao ; Wenguang Zhang ; Yang Su

Author_Institution

Maintenance & Test Dept., Fushun Power Supply Co., Fushun, China

fYear

2011

fDate

16-18 Sept. 2011

Firstpage

1611

Lastpage

1613

Abstract

Through the analyzing to arrester thermal breakdown on 10kV side with no load of 220kV main transformer, the fault direct cause is conformed that because the normal voltage of arrester (YH5WS-17/45) is too low, the arrester get over heat, and then thermal breakdown happens. The right nominal voltage choosing methods for gapless arrester and the possibility of gap zinc oxide arrester application are presented in this paper. The shortcoming of the B-phase direct grounding operating type and a arrester parallel connecting with each phase on 10kV side of transformer is the best protecting method are pointed out.

Keywords

arresters; lightning protection; power transformer protection; B-phase direct grounding operating type; arrester thermal breakdown; gap zinc oxide arrester application; lightning arrester; main transformer; voltage 10 kV; voltage 220 kV; Accidents; Arresters; Capacitance; Capacitors; Grounding; Power transformer insulation; Windings; Zinc Oxide arrester; arrester nominal voltage; capacitance transfer over-voltage; temporary over-voltage; thermal Breakdown;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical and Control Engineering (ICECE), 2011 International Conference on

Conference_Location

Yichang

Print_ISBN

978-1-4244-8162-0

Type

conf

DOI

10.1109/ICECENG.2011.6057311

Filename

6057311