基于RN8302的三相高压电能表研究  

Development of Three-Phase High-Voltage Energy Meter Based on RN8302

作　　者：闫鑫[1] 路军 张洪伟 李立伟[1] 

机构地区：[1]青岛大学自动化与电气工程学院,山东青岛266071 [2]国网山东省电力公司鲁能体育文化分公司,山东济南250002 [3]国网山东省电力公司物资部,山东济南250001

出　　处：《青岛大学学报（工程技术版）》2017年第4期21-24,41,共5页Journal of Qingdao University(Engineering & Technology Edition)

基　　金：山东省自然科学基金项目资助(Y2008F23);山东省科技发展计划项目资助(2011GGB01123);863计划项目资助(2014AA052303);山东省自主创新及成果转化专项(2014ZZCX05501)

摘　　要：针对常规电能表计量装置在系统中存在的可靠性、防窃电及准确度等级等问题,本文采用一体化结构,研制了一种基于RN8302的新型三相高压电能表。设计了电阻分压电路采集电压信号及低功耗电流传感器采集电流信号,并利用高精度分压电阻从配电线路直接取电,实现了将整个测量系统无电位差地悬挂在高压侧,具有很好的防窃电功能,而采用的专业三相电力计量芯片RN8302作为计量单元的核心,相对于单相计量,易于操作、节省资金、准确度较高;STM32作为主控CPU,减少了计量环节的误差。同时,运用AD10软件进行PCB的设计与封装,并对该装置进行实验验证。实验结果表明,该装置精确度达到了0.2S级,满足了目前智能电网对电能表精确度的要求。该研究对电能计量的发展具有重要意义。The traditional metering device has some problems in system reliability, electricity-stealing preven-tion and accuracy. In order to solve the above problems, a new type of three-phase high-voltage energy meter based on RN8302 is designed in this paper. In order to collect voltage signal, we design voltage divider circuit. It uses low-power current sensor to collect current signals. The whole measurement system is hung on the high voltage side without potential differenceby using high precision voltage divider to directly take electricity from distribution line and it has a very good anti stealing function. It uses the RN8302 which is professional metering chip as the core of the measurement unitand it has advantages in terms of operation, cost, and accuracy. Be-sides ,STM32 as the main control CPU reduces the measurement error. Finally, we perform PCB encapsulation by using AD10 and the experimental results show that the performance of the device has reached 0. 2 S accuracy requirements. It meets the requirements of the current smart grid on the accuracy of the electric energy mete-ring device, which is of great significance to the development of electric energy metering.

关 键 词：RN8302 高压取电 电能表 准确度 

分 类 号：TM933.4[电气工程—电力电子与电力传动]