Title :
Influence of Grading Ring on Potential Distribution of 1000 kV Gas Insulted Switchgear Metal Oxide Arrester
Author :
Zhang, Bo ; He, Jinliang
Author_Institution :
Dept. of Electr. Eng., Tsinghua Univ., Beijing, China
Abstract :
The metal oxide arrester (MOA) is key equipment in high voltage power system. If the potential exerted on a ZnO disc is very high, it is more easily destroyed than others. Compared with GIS MOAs for 750 kV and below, the 1000 kV GIS MOA has greater height, larger volume and multiple columns, which leads to a very nonuniform potential distribution and makes the method to analyze the potential distribution different from the 750 kV and below GIS MOAs. Considering the complicated configuration of the 1000 kV GIS MOA, in this paper the 3D FEM is applied and the potential distribution of the 1000 kV GIS MOA is analyzed. The grading ring is one of the key structure to make the potential distribution uniform. The paper will analyze the influence of the grading ring on potential distribution, which will be useful for the design of the arrester.
Keywords :
arresters; finite element analysis; gas insulated switchgear; 3D FEM; ZnO; gas insulted switchgear metal oxide arrester; grading ring; potential distribution; voltage 1000 kV; voltage 750 kV; Arresters; Capacitance; Flanges; Gas insulation; Geographic Information Systems; Power systems; Switchgear; Varistors; Voltage; Zinc oxide;
Conference_Titel :
High Voltage Engineering and Application, 2008. ICHVE 2008. International Conference on
Conference_Location :
Chongqing
Print_ISBN :
978-1-4244-3823-5
Electronic_ISBN :
978-1-4244-2810-6
DOI :
10.1109/ICHVE.2008.4773952
