摘要
在变电站恶劣的电磁环境下,当前数据采集单元的抗混叠模拟低通滤波器不能充分抑制频谱混叠,从而使测控装置性能变差。基于过采样技术,提出一种能有效抑制频谱混叠的数据采集新方法;进而,紧密结合实际讨论了运用过采样技术设计数据采集单元的相关问题;最后,通过实验对传统采样方法和过采样方法进行比较,验证了过采样方法的有效性。
In the foul electromagnetic circumstances of a substation, the anti-aliasing low-pass filters of current sampling unit cannot restrain high-frequency noise sufficiently. This will reduce the performance of related digital equipment for measurement and control. A new sampling method based on over-sampling technology is presented. This method can effectively reduce aliasing. Some issues in practice on the sampling unit design of the over-sampling technique are discussed. Finally, the data sampled by the conventional method and the new method is compared to demonstrate the advantages of the proposed method and its validity.
出处
《电力系统自动化》
EI
CSCD
北大核心
2004年第14期58-62,共5页
Automation of Electric Power Systems
关键词
过采样
数据采集单元
混叠
低通滤波器
电磁兼容性
over-sampling
data sampling unit
aliasing
low-pass filter
electromagnetic compatibility (EMC)
