一种直流数字化电能表的量值溯源方案  

A traceability scheme of DC digital watt-hour meter

作　　者：吴瀛 刘佳 周会宾 赵进全[3] 罗文杰 WU Ying;LIU Jia;ZHOU Huibin;ZHAO Jinquan;LUO Wenjie(Extra High Voltage Power Transmission Company, China Southern Power Grid,Guangdong Guangzhou 510663, China;China Electric Power Research Institute, Beijing 100192, China;School of Electrical Engineering, Xi'an Jiaotong University, Shaanxi Xi'an 710049, China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司检修试验中心,广东广州510663 [2]中国电力科学研究院有限公司,北京100192 [3]西安交通大学电气工程学院,陕西西安710049

出　　处：《工业仪表与自动化装置》2021年第1期68-72,共5页Industrial Instrumentation & Automation

摘　　要：直流数字化电能表在电能计量中应用日益广泛,但缺乏专门针对直流数字化电能表量值溯源方案的研究。针对我国缺乏对直流数字电能表量值溯源方案的研究现状,以及现有的交流数字电能表量值溯源方案中存在标准电能计算准确度受采样频率限制、量传误差环节多等问题,提出了一种基于直流数字化标准功率源的直流数字电能表量值溯源方案。该方案在交流数字电能表量值溯源方案的基础上,利用标准数字功率源内置DSP的数字波形拟合与抽取,替代交流溯源方案中的A/D转换;利用DSP高频数字采样积分,替代交流溯源方案中的标准数字电能表。简化了交流数字表的溯源方案,减少量传误差,提高了直流标准电能计算精度,实现了直流数字化电能表的量值溯源,是直流数字化电能表量值溯源的一种新方案。DC digital meter is widely used in power system,but there is no research on traceability scheme of DC digital watt hour meter.In view of the problems existing in the traceability scheme of AC digital watt hour meter,such as the accuracy of standard electric energy calculation is limited by sampling frequency,and there are many links of transmission error,a DC digital watt-hour meter traceability scheme based on DC digital standard power source is proposed.Based on the AC traceability scheme,the digital waveform fitting and extraction of standard digital power source built-in DSP is used to replace A/D conversion in AC traceability scheme,and DSP high-frequency digital sampling integration is used to replace the standard digital watt-hour meter in AC traceability scheme.It simplifies the traceability scheme of AC digital meter,reduces the transmission error,improves the calculation accuracy of DC standard electric energy,and realizes the traceability of DC digital watt-hour meter.It is a new traceability scheme of DC digital watt-hour meter.

关 键 词：量值溯源 量值传递 直流数字化电能表 直流数字化标准功率源 

分 类 号：TM933[电气工程—电力电子与电力传动]