摘要
基于相关性分析,提出了一种适合于交流电力智能传感器的功率测试方法,并将其与传统的定义法进行了分析、比较,指出在不增加任何额外硬件开销和计算量的情况下,相关性分析法能有效抑制采集信号中干扰的影响,从而简化系统、降低成本、提高实时性等测试性能。试验表明,相对于定义法,相关性分析法可减少约2倍用于分析的采样点数,干扰幅值的要求从小于信号幅值的3%可放宽到信号幅值的12%。
For AC power smart sensor, the power test method based on correlation analysis is proposed. It is an- alyzed and compared with traditional approach obtaining the power according to the definition. It is pointed out that the correlation analysis can reduce the impact of interference in the power signal on test precision effec- tively, and then the system simplification, cost reduction and improvement of test performance such as real-time performance without any additional overhead in hardware and computing time. Experimental results show that compared with the traditional way, the correlation-based method can reduce the number of the sample data for power analysis by about two times and the noise amplitude can be permitted from less 3% to 12% of signal amplitude.
出处
《测控技术》
CSCD
北大核心
2010年第9期99-102,共4页
Measurement & Control Technology
基金
四川省教育厅科研基金资助项目(08ZC010)
