摘要
为提高在线监测系统检测的精度 ,采用数理统计原理预处理采样数据以减小脉冲干扰、高频干扰和采样元件引起的粗大误差对监测系统精度的影响 :采用海Hanning加权插值FFT算法跟踪电网频率变化 ,修正谐波分析结果 ,从而提高了电容型设备介质损耗角在线测量的精度。对数字信号实验和实测数据采用两种算法处理的结果均表明 ,该算法可较好地满足绝缘在线监测系统的精度要求。
In this paper, the software methods to improve the accuracy of on-line insulation monitoring system are presented. Using statistical theory, an algorithm of preprocessing the sampling data in on-line insulation monitoring is offered to decrease the impulse interferences, high-frequency interferences and gross errors due to sampling element. In order to improve the measurement precision of tan δ, this paper presents Hanning-windowed signal parameter taken by harmonic analysis. The result of trial proves that it has higher precision and satisfies on-line insulation monitoring system.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2004年第8期38-39,共2页
High Voltage Engineering
关键词
软件算法
数理统计原理
海宁加权插值快速傅立叶变换
software method statistical theory Hanning-windowed interpolated Fast Fourier Transform
