传感器安装偏差对功率流测试误差的影响分析

摘要

In order to analyze the influence of mounting deviation on measuring accuracy of power flow, the effect of mounting deviation on error of power flow based both on cross spectral density method and wave decomposition method were developed respectively. The mounting deviation was divided into position deviation and angle deviation. It is shown that the two models are identical. The error caused by position deviation is decided by the difference of position deviation between two transducers,the error caused by the angle deviation does not vary with frequency and always make the power flow smaller than normal, and the total error is the product of the both.%为分析传感器安装偏差对功率流测试误差的影响,将安装偏差分解为位置偏差和角度偏差两个部分,并分别基于互功率谱法和波分解法建立传感器安装偏差与功率流测试误差之间的数学模型.仿真分析结果表明:所建立的互功率谱法和波分解法功率流测试误差模型完全一致；位置偏差对功率流的影响由两个传感器位置偏差之差决定,角度偏差对功率流测试误差的影响与频率无关,但始终使得功率流向更小的方向变化,而总误差为两种安装偏差各自产生误差之积.