频率变化时的有效值积分计算分析  

Analysis of Effective Value Integral on Frequency Offset

作　　者：杨卉卉[1] 张华年[1] 房同忠[1] 王彦辉[1] 李莎[1] 

机构地区：[1]北京四方继保自动化股份有限公司,北京100085

出　　处：《电力学报》2013年第2期119-121,共3页Journal of Electric Power

摘　　要：通过对频率变化时的有效值积分算法进行理论分析,得出计算误差和积分周期并不是绝对反比关系的结论,随着积分周期的增加,误差呈震荡衰减变化。通过Matlab仿真,给出了选择合适的积分周期的方法,并指出对变频信号的分析可以集中在负频率偏移的信号中。On the base of corresponding theory analysis,conclusion that calculation error caused by frequency offset is not in absolute inverse proportion to the integration cycle is provided.Errors behave as a damped oscillation accompanying cycles increases.Based on Matlab simulation analysis,suitable integration cycle is selected to guarantee higher accuracy and lower complexity.Signals whose frequency deviation is negative are typical.

关 键 词：积分算法 积分周期 频率偏移 有效值 

分 类 号：TM771[电气工程—电力系统及自动化]