The Application and Analysis on Three Different Current Compensation Methods Used in Transformer Differential Protection
This paper analyzes used in wye-delta connected transformer differential protections, impacts of these current compensation methods to identify inrush current under different conditions of occurring inrush, i.e. single phase, two phases and three phases, are studied. Based on the simulation of MATLAB, this paper emphasizes the second harmonic component contained in differential current when transformer is energized without loads, and concludes that the compensation methods only using currents in wye side of transformer has the same effect to discriminate inrush currents compared with other two compensation methods. In addition, It analyses the relationship between the first and second harmonic components contained in the differential current, and points out that the method using phase angle in the second harmonic component in differential current is not suitable for three different current compensation methods.
transformer differential protection inrush current current compensation method the second harmonic component the restrain method using phase angle
Bin Zheng Jie Zhang
School of Agricultural Engineering and Food Science Shandong University of Technology Zibo, PR. Chin School of Electronical Engineering North China Electric Power University Beijing, P.R.China
国际会议
山东淄博
英文
200-206
2011-05-27（万方平台首次上网日期，不代表论文的发表时间）