Open AccessShell circulating current and transient ground potential rise in 220 kV GIS
Author(s) -
Chen Taiyu,
Liu Hongshun,
Hu Dongyang,
Liu Xinghua,
Xu Tianxi,
Yang Xiaoshuai,
Ji Liang
Publication year - 2017
Publication title -
the journal of engineering
Language(s) - English
Resource type - Journals
ISSN - 2051-3305
DOI - 10.1049/joe.2017.0788
Subject(s) - transient (computer programming) , current (fluid) , transient analysis , environmental science , nuclear engineering , computer science , transient response , electrical engineering , engineering , operating system
In recent years, gas‐insulated switchgear (GIS) become more and more important in the power grid. The distance between GIS shell and its internal conductor is short, which cause a strong electromagnetic coupling between these two parts. A travelling wave will occurred when the GIS isolating switch and circuit breakers are closed or broken down, which will cause a high‐frequency oscillation electrical signal called very fast transient voltage, and finally lead to GIS shell circulating current and transient ground potential rise (TGPR). The principle of partial electric equivalent circuit (PEEC) method is briefly introduced here, and an equivalent circuit of GIS metal shell, bus conductor, and grounding grid is built according to the PEEC method. Based on the model of GIS shell and grounding circulating current, the theoretical calculations of the shell and grounding circulating current are taken by using the ATP‐EMTP simulation software. According to the result, the possible influencing factors of shell circulating current and TGPR are analysed, and some reasonable control measures are proposed.