摘要
提出一种介质损耗角正切值tgδ的高精度分析算法,用DFT求得电流i(t)和电压u(t)的离散频谱,从而求出其对应的相角,其相角之差即为介损角δ。仿真计算表明,即使对信号不实施整周期采样,且在信号中谐波和噪声含量较高的情况下,算法精度仍很高,满足工程要求。
This paper presents a high precision analysis algorithm for measuring the tgδ value of the dielectric loss angle, gets the coefficient spectrum of the current i(t) and voltage u(t) using DFT, then gets the relative phase angles, and the difference of the phase angles is the dielectric loss angle δ, the simulation shows the precision of the algorithm is high, even if the signal sampling is not whole period and the signals contains heavy noises and harmonics, and it satisfies the requirement of the project.
出处
《电测与仪表》
北大核心
2004年第11期16-18,31,共4页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(50277010)
教育部高等学校博士学科点专项基金资助项目(20020532016)
