微功率无线通信信号对电能表的干扰研究

Interference study of micro-power wireless communication signal for the energy meter

一直以来对用电信息采集系统中微功率无线通信的研究集中在符合标准的前提下提高其通信的稳定性和成功率,忽略了其在作为通信信号的同时天然的成为了智能电表不可忽视的干扰源。为分析了微功率无线通信信号对智能电表的干扰,针对国家电网公司企标中对微功率无线发射机功率不超过50m W的要求,对符合该标准产品的无线通信信号所产生的电场强度进行理论计算和实际采样测试,实验发现电能表国家标准中对电能表射频电磁场抗扰度30V/m的要求已不能确保使用微功率无线模块的智能电能表正常工作。

For a long time, the research on the micro-power wireless communication has focused on the stability and success rate of communication under the standard while has ignored the fact that it has been the source of interference for smart meter when sending signals. To analyze the interference of the micro- power wirless communication signal with the smart meter,theoretical calculation and actual sample test on the electric field intensity complied with the standard have been conducted. It has been found that meter national standard for meter RF electromagnetic field immunity of30 V / m requirements can not ensure proper operation using a micro- power wireless module power meter, indicating there are loopholes between the two standards. Thus, revisions are suggested.