Hybrid Dissolved Gas-in-Oil Analysis Methods

• 作者: Leonidha Londo Marialis ?elo Nako Hobdari Rajmonda Bualoti
• 来源期刊: 电力能源(英文)
• 学科: 医学
• 关键词: Dissolved GAS Analysis KEY GAS METHODS Rogers’ Ratios TRANSFORMER
• 年，卷（期）: 2015,（6）
• 页码范围: 10-19
• 页数: 10页
• 分类号: R73

摘要

Dissolved gas analysis is the most widely used diagnostic test in power transformers. The aim of this paper is to introduce the dissolved gas analysis (DGA) methods able to diagnose the transformer conditions. The faults cause the transformer oil, pressboard, and other insulating materials to decompose and generate gases, some of which dissolve in the oil. The results of DGA must be accurate if faults are to be diagnosed reliably. There are different established methods used in industry for interpreting DGA results. We will compare the result of IEEE Key Gas Methods and Rogers’ Ratios. The transformer conditions are evaluated by the Key Gas Method with total combustible gas method (TCGM) and then verified by the Rogers’ Ratios. As result, the aging pattern and trend of the power transformer deterioration can be determined. The 30 sample data from IEEE with known faults and dissolved gas concentrations were used as the basis of comparison.