FPGA Realization of S-Transform and Its Application to Electric Power Quality Analysis

• Main Authors: Chang-Jen Chiang, 蔣昌仁
• Other Authors: Shyh-Jier Huang
• Format: Others
• Language: zh-TW
• Published: 2006
• Online Access: http://ndltd.ncl.edu.tw/handle/91420693139764235344

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 94 === 　　With the increased utilization of nonlinear loads at demand side, the quality of supplying power is getting worse nowadays. Therefore, in this thesis, the main purpose lies in the field programmable gate array realization of S-transform and its application to power quality analysis. It is expected that through the time-frequency localization capability of S-transform, the time-frequency distribution of electric power disturbances can be better grasped. In the study, the virtual instrument system was also employed to visualize the disturbance variation. Meanwhile, the VLSI structure was implemented for the S-transform computation using field programmable gate array, where several modules were designed to facilitate the disturbance identification. In order to confirm the feasibility of such an approach, several disturbances including voltage interruption, voltage sag and voltage swell were all simulated and tested. Test results help support the time-frequency localization capability exhibited by the proposed approach. These outcomes can be also served as useful references for electric power engineers in the power quality improvement study.