基于AD73360电力谐波表准确度途径研究  

Research of Power Harmonic Instrument Accuracy Based on AD73360

作　　者：沈小青[1] 席震东[1] 孙朝斌[1] 石明华[1] 邱斌[1] 

机构地区：[1]中国卫星海上测控部,江苏无锡214431

出　　处：《计算机测量与控制》2012年第6期1622-1624,1628,共4页Computer Measurement &Control

摘　　要：以16位A/D转换器AD73360和高性能数字信号处理器TMS320F2812为核心的电力谐波表设计较为广泛,作为工程应用,提高准确度是工程应用成功实现的关键因素;文章给出了硬件设计框图,通过修正AD73360频率响应,基本消除了A/D转换器引入的误差,通过时域平移相位差校正法,减少非同步采样引入的误差,大大提高了测量准确度;同时给出了MATLAB仿真源代码;实验结果表明,设计中采取的频响修正技术、减小非同步误差技术以及信号调理技术提高了测量准确度,仪表的准确度满足GB/T19862-2005《电能质量监测设备通用要求》5.2.2准确度要求。Abstract： 16--bit A/D converter AD73360 and high--performance digital signal processor TMS320F2812 as the core design of power harmonic instrument is more widely used as an engineering application. Engineering applications to improve accuracy is a key factor in successful implementation. Article gives the block diagram of hardware design. The A / D converter error is basically eliminated by correcting the AD73360 frequency response. The non--synchronous sampling error is reduced by shifting the phase difference time--domain correction method. All these greatly improve the measurement accuracy, and article gives the MATLAB simulation source code. Experimental results show that the frequency response correction technology, reducing the non--synchronous error and signal conditioning technology improve the measurement accuracy. The instrument accuracy meets GB/T19862--2005 ＂General requirements for monitoring equipments of power quality＂ 5.2. 2 accuracy requirements.

关 键 词：准确度 频率响应 离散频谱校正 信号调理 

分 类 号：TM933[电气工程—电力电子与电力传动]