A Motor Differential Protection Device Based on Fault Component
BI Rui , WEN Yang-dong , XU Hua-li
(School of Electric Engineering and Automation ,Hefei University of technology ,Hefei 230009,China )
Abstract: A microcomputer-based motor protection device based on fault component is designed in this paper. The device compensates the insufficiency of the microcomputer-based motor integrated protection device designed previously. Using the two devices in practice can meet the demands of high-voltage motor. Compared with traditional differential protection based on all components, differential protection based on fault component show its advantage. The design of device's hardware , the theory of protection and the algorithm of signals processing are introduced in the paper.
Keywords: microcomputer-based protection ;fault component;percentage differential protection;Fourier algorithm