An Enhanced FFT-based Voltage Flicker Calculation Algorithm and Its Implementation by a Remote Monitoring System Using Wireless Communication Network and Internet

• Main Authors: Geng-Mo Zhu, 朱耿模
• Other Authors: Ming-Tang Chen
• Format: Others
• Language: zh-TW
• Published: 2007
• Online Access: http://ndltd.ncl.edu.tw/handle/25222850283045266943

碩士 === 國立高雄應用科技大學 === 電機工程系碩士班 === 95 === An enhanced FFT-based voltage flicker calculation algorithm was proposed in this thesis, and a remote monitoring system was developed to implement the algorithm and the flicker instrumentation. The instrumentation system integrates virtual instrument, wireless network, internet, web server, data base server, and client PC. The communication among different modules is through general packet radio service（GPRS）and world wide web, and the dynamic flicker information on the power line is post on the proper web page whish is produced by JSP. So, the responsible operator of a power line can effectively realize the flicker conditions including different flicker components, equivalent flicker index , and their trends during long-term measuring period. The prototype of the system was tested at different locations inside and outside the lab, and the results illustrate that the performance of the enhanced algorithm is better than the conventional method; besides, the on-line flicker indices can be successfully transmitted to the data base, and continuously updated on the web pages. The performance of data communication and the cost validate the feasibility of the system.