摘要
作为目前电网主谐波源分析的基础,主要研究了公共快速傅立叶变换耦合点的谐波阻抗的准确测量问题。采用基于干扰前后稳态波形的电网谐波阻抗测量方法,实现了利用FFT(fast forier transform)基波比较法修正测量过程中的相角偏移和采用αβ0对称分量转换法解决三相不平衡的问题。通过仿真实验表明,此谐波阻抗测量及其修正方法简单、正确,适于实际应用。
As the basis of the detection of harmonic sources, the measurement of network harmonic impedances is analyzed. In this paper, the method based on pre- and post- disturbance steady-state measurement is used. Further the FFT（fast Fourier transform） fundamental component method is presented to calculate and correct phase shift,and the αβ0 modal transformation technique is applied to decoupling the three measurements into a set of single variables. Through a series of real system switching tests it is shown that the proposed method is simple and realizable in the practical applications.
出处
《电力系统及其自动化学报》
CSCD
北大核心
2007年第2期55-59,共5页
Proceedings of the CSU-EPSA
基金
河北省教育厅科研计划项目(2005349)
河北大学自然科学基金资助项目(2005053)
关键词
谐波阻抗
谐波源
公共耦合点
harmonic impedances
harmonic source
the point of common coupling
