Analysis and Improvement Measures of Acetylene Gas in Converter Transformer

Abstract

After ± 660kV converter station put into operation, Acetylene gas was reported in the online oil chromatography of converter transformer. After half year of operation, the acetylene content of the converter transformer was 1.31ppm. It was exceeded the alarm value of 1ppm. The excessive acetylene gas in the oil interferes with the operation state analysis of the converter transformer. By analyzing the gas production mechanism of the tap changer switch, it is found that the polar switch produce acetylene gas. After the actual tracking verification, it is found that reducing the tap changer polar switch action could effectively reduce the acetylene content. This paper proposes the influence of tap changer switch on acetylene content and countermeasures to provide reference for the operation analysis of converter transformer.

Keywords: Converter Transformer, Acetylene, Tap Changer Switch, Online Monitoring