摘要
风机加装了高压变频器后,基于傅氏计算法的传统微机相量差动保护会误动导致风机跳闸。为避免此种情况发生,通过分析加用高压变频器后差动回路电流产生的原因和估算方法,指出解决其方法为优化差动保护或退出变频时的差动保护以防止误动。
Fan installed high voltage frequency converter,based on Fourier method traditional microcomputer differential protection once maloperation will cause fan to trip.To avoid this situation,this paper analyzes the reason causing differential circuit current appearing from running high voltage frequency converter and its estimation methods,points out that the solution should be optimizing differential protection or exiting the differential protection when in frequency-converting to prevent misoperation.
出处
《华中电力》
2012年第2期17-19,共3页
Central China Electric Power
关键词
风机
高压变频器
差动保护
fan
high-voltage inverter
differential protection
