The Analysis on Influence of Test Error of Voltage Transformer Primary Test Circuit Causes on GIS and the Improvement of Test Method

Abstract:

Recently, the Gas Insulated Station (GIS), small floor area ,convenient maintenance and good security ,is applied more and more extensively, but it becomes difficult to calibrate the error of measuring voltage transformer in main circuit on GIS with the application. According to the regulations, high voltage must be imposed on high voltage incoming line bushing in the high voltage test to voltage transformer. However, primary test circuit is long because of the long distance between the high voltage incoming line bushing and the tested voltage transformer, which makes the loop impedance large, so the measuring veracity is affected. In this paper, the Finite Element Method (FEM) is used to determine calculation model of each element on GIS station combined with 110kV station called rocket base in new coastal region, then Electromagnetic Transient Program (EMTP) is used to design the calculation model of the GIS station. The influence of test error of voltage transformer the primary test circuit causes is analyzed in theory. The experiment that the voltage imposed on low voltage side is used to measure the error of high voltage side is made to verify accuracy of the method in this paper.

• Periodical: Advanced Materials Research (Volumes 734-737)
• Pages: 2689-2693
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.734-737.2689
• Online since: August 2013
• Authors: Zhi Long Zhang*, Hong Su
• Keywords: Electro-Magnetic Transient Program, Error Characteristics Simulation, Gas Insulated Station, High-Voltage Entrance Bushing

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