期刊名称：International Journal of Hybrid Information Technology
印刷版ISSN：1738-9968
出版年度：2015
卷号：8
期号：9
页码：131-142
DOI：10.14257/ijhit.2015.8.9.14
出版社：SERSC
摘要：Dielectric loss factor measurement is an important index in accessing the insulation performance of power equipment. With the development of the condition-based maintenance and smart grid, more attention has been paid to online diagnostic technologies for the dielectric loss factor measurement. Various methods have been developed in this field in which harmonic analysis (HA) is prevalent due to its performance of resisting disturbance and stability superior to others. When performing the HA method on the sampled data, the non-simultaneous sampling and the lack of synchronization between sampling rate and the signal period are believed to be the main source of error in the measurement of the magnitude and the phase of the signals. To improve the effectiveness of the HA method, measures were taken by means of the designing online monitoring system. The basic principle of the HA method is presented in this paper and an online monitoring system based on DSP technology is developed accordingly. At last, this paper analyses the on-line monitoring results resulted from the online monitoring system on a substation.
关键词：Dielectric Loss Factor; Harmonic Analysis Method; Online Monitoring ; System
