Title :
A Novel Arc Model for Very Fast Transient Overvoltage Simulation in a 252-kV Gas-Insulated Switchgear
Author :
Huamao Zhan ; Shaofeng Duan ; Chengrong Li ; Linzhi Yao ; Lin Zhao
Author_Institution :
Beijing Area Major Lab. of High Voltage & Electromagn. Compatibility, North China Electr. Power Univ., Beijing, China
Abstract :
One of the important issues of concerns for gas-insulated switchgear (GIS) is the generation of very fast transient overvoltage (VFTO) during switching operations, especially at operational voltage levels of 330 kV and beyond. It becomes extremely important to build an arc model for VFTO simulation, since the arc determines VFTO characteristics to a great extent. However, existing arc models for VFTO simulation are too simple to provide simulation results that agree well with the experimental ones. As the arc resistance is often taken as a function of the very fast transient current (VFTC), it is necessary to get the experimental data on the VFTC. Therefore, a 252-kV GIS platform has been built as well as the VFTO and VFTC measuring system. On the basis of the experimental investigation, a novel arc model for VFTO simulation was proposed, in which the time dependent characteristics of the arc resistance is revealed. The model may be used for VFTO simulation for extra high voltage or ultrahigh voltage GIS.
Keywords :
arcs (electric); gas insulated switchgear; overvoltage protection; VFTC measuring system; VFTO measuring system; arc model; arc resistance; gas insulated switchgear; time dependent characteristics; very fast transient overvoltage simulation; voltage 252 kV; voltage 330 kV; Current measurement; Electrical resistance measurement; Gas insulation; Integrated circuit modeling; Mathematical model; Resistance; Transient analysis; Frequency-domain analysis; gas-insulated switchgear (GIS); very fast transient current (VFTC); very fast transient overvoltage (VFTO);
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2014.2353416
