虚拟电功率计的设计与测试  

Design and Testing for Virtual Electrical Power Meter

作　　者：张小燕[1] 

机构地区：[1]北京工业职业技术学院信息工程系,北京100042

出　　处：《北京工业职业技术学院学报》2014年第1期48-53,共6页Journal of Beijing Polytechnic College

基　　金：2013年北京工业职业技术学院科研课题(BGZYKY201338)

摘　　要：在功率测量中,由于非整周期采样、随机噪声、通道延时的存在,会降低测量准确度。针对这个问题,首先设计算法来减小这些因素的影响;然后在Labview平台上编写数据采集和数据处理程序;接着用信号发生器作为信号源和噪声源,NI ELVISⅡ作为数据采集设备采集电信号,并用所设计的采样整周期性算法、去除随机噪声算法、修正通道延时算法处理采集的数据,测量出源信号的有效电压值、有效电流值、平均功率、视在功率、无效功率和功率因数;最后进行数据分析和讨论。结果证明,所设计的功率测量算法能够减小上述3种因素对功率测量的影响,得到具有较高准确性的功率测量值。In the electrical power testing, a lower accuracy can be acquired because of non - integer period sam- piing, random noise and channel delay. First, some algorithms are designed to reduce the influence of these fac- tors. Second, on the Labview platform, the data acquisition and data processing are programmed. Then, sampling the electric signal generated by two signal generators, one of which is signal source, the other is noise source, un- der the help of NI ELVIS ]] , and processing the data through the designed integer period sampling algorithm, re- move the random noise algorithm and amend the channel delay algorithm. The effective voltage, effective current, average power, apparent power, reactive power and power factor are measured. The result shows, the designed power testing algorithm can reduce the power testing influence, and acquire higher power measurement accuracy.

关 键 词：虚拟仪器 电功率测量 数据采集 随机噪声 非整周期采样 通道延时 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]