【摘要】 本文研究测量局部放电特性的平行四边形方法,发现平行四边形的水平宽度与绝缘系统所含气隙的放电电压和残余电压有关,提出了一种确定气隙放电电压和残余电压的方法——平行四边形两次测量法。从而认定平行四边形转角表征的电压值和电荷转移量也是平行四边形法中的重要参数,利用这些参数可以估计放电特性。此外,本文分析证明了气隙试样中平行四边形图形特征。更多还原

【Abstract】 The parallelogram method used for the measurement of partial discharges is studied in this paper. It is found that the width of the parallelogram figure is directly related to the sparking voltage and residual voltage of a void included in an electrical insul- ation system.Based on this relationship, a twice measuring method of parallelogram is dev- eloped by which the sparking voltage and residual voltage can be calculated from the measured parameters of two parallelograms. This indicates that the voltage values and the charge transfers represented by the corner of the parallelograms are found to be also the important parameters for the determination of partial discharge characteristics. In addition, when the insulation system contains a variety of sizes of small voids, each with a different partial discharge inception voltage,the shape of the parallelogram is described by the theoretical analysis and the experimental results.更多还原