Application and Improvement of Ratio Method for Power Transformer DGA Data Diagnosis
Dissolved Gas Analysis (DGA) can be performed to monitor and diagnose the insulation condition of oil-immersed power equipment without request of power outage, with the advantages of easily performing, less interference and high sensitivity, et al. It has been considered as one of the best methods to diagnose the early fault and to prevent the catastrophic accident of power transformer. Based on the statistical disciplines between gas contents in oil and on-site fault results, many researchers proposed many effective ratio methods for DGA diagnosis. Seven kinds of DGA ratio methods are introduced, including the improved method from electrical cooperation association, IEC60599 method, Dornenburg ratios, four ratios in Germany, hydrogen-methane-ethine (HAE) triangle figure, simplified Duval method and thermal-discharge figure, et al, and based on more than 500 groups of on-site DGA data, their advantages and disadvantages are summarized. Some improvements and suggestions are proposed against their disadvantages.
Power transforme DGA Ratio method Fault diagnosis Discharge Overheating
Ya-jun Qiao Guo-jun Lu Yong Wang
Central Testing and Researching Institute of Guang Zhou Power Supply Company,Guangzhou,510310,China
国际会议
2008 China International Conference on Electricity Distribution (CICED 2008)(2008中国国际供电会议)
广州
英文
1-6
2008-12-10（万方平台首次上网日期，不代表论文的发表时间）