摘要
谐波分析法用于介损在线测量时,由于系统频率波动,难以满足理想的同步采样,从而产生泄漏误差影响基波相角测量的准确度。为减小泄漏误差,提高介损测量准确度,通过加窗插值,修正理想采样频率和采取偏移频率补偿对原算法进行了改进。理论推导和仿真结果都验证了改进方法的有效性。
When applying harmonics analysis approach to measuring tanδ on-line, the measurement accuracy will be influenced by leakage error because of the frequency fluctuation of power system. To improve the accuracy, this paper introduces three modified algorithms of interpolation algorithm on Blackman-Harris window, algorithm of modified frequency and algorithm of frequency compensation. Theory derivation and simulation results verify that the modified algorithms have higher accuracy than the original ones.
出处
《高压电器》
EI
CAS
CSCD
北大核心
2005年第1期4-5,9,共3页
High Voltage Apparatus
关键词
介质损耗
谐波分析法
在线监测
修正理想采样频率
偏移频率补偿
dielectric loss
harmonics analysis method
on-line measurement
modified ideal sampling frequency
frequency compensation
