乘法型D/A转换器交流有功功率的测量方法  

Measuring method of AC active power basing on multiplying D/A converter

作　　者：郭松林[1] 郭明良[1] 

机构地区：[1]黑龙江科技学院电气与信息工程学院,哈尔滨150027

出　　处：《黑龙江科技学院学报》2008年第5期364-366,共3页Journal of Heilongjiang Institute of Science and Technology

基　　金：黑龙江省教育厅科研基金项目(11511340)

摘　　要：为了正确反映电力系统的状况,提出了一种高准确度的工频交流有功功率的测量方法。该方法由乘法型D/A转换器构成四象限乘法器,通过理论推导得到了有功功率的理论表达式,分析了测量方法误差及影响测量准确度的因素。对测量误差估计公式的MATLAB仿真表明:有功功率的测量方法误差仅为±0.003 70%,远小于国际标准的0.01%。根据该方法,可构造50Hz工频高准确度的交流有功功率标准表。This paper proposes a high precision measurement method of AC active power, designed to accurately reflect the electric energy consuming of the electric power bureau. The method involves the construction of the Four quarter multiplier based on the multiplying D/A Converter, the developemnt of an academic expression of the experimental active power according to the frame of reference deducion, and the analysis of the error of method and the factors influencing measurement accuracy quantitatively and qualitatively. The MATLAB imitation of the expression of the measuring error estimation suggests that the measuring method of the measuring active power gives an error smaller than ± 0. 003 70%, greatly smaller than ±0.01%. as defined by the international standard of AC active power. The measuring method is capable of the high precision standard Watt and hour meter of AC active power.

关 键 词：有功功率 乘法型D/A转换器 四象限乘法器 

分 类 号：TM933.36[电气工程—电力电子与电力传动]