直流电能表国内外标准对比分析

Comparative Study on Domestic and International Standards of DC Electric Energy Meter

随着能源系统脱碳战略的提出以及直流电网、电动汽车直流充电技术的发展,直流电能计量成为国内外关注的热点。为促进国内相关工作的开展,将最新发布的直流电能表IEC(国际电工委员会)标准与我国现行国标及型式评价大纲进行对比,针对适用范围、准确度要求及影响量试验项目等主要差异点进行了分析。结果表明:IEC标准中电能表电压、电流范围要比国内宽泛,且新增了传导差模电流干扰试验等影响量试验项目;应尽快完善国内直流电能表规格与抗扰度评价方法,促进直流电能表更好地满足实际工程需求。

With the decarbonization of energy sectors and the development of DC power grid and the DC charging technology for electric vehicles,DC energy measurement has become a hot topic both at home and abroad. In order to promote the development of relevant research in China,the latest released IEC(International Electrotechnical Commission)standards of DC energy meter are compared with China’s existing national standard and the pattern evaluation program,and the main differences such as the scope of application,accuracy requirements and influence test items are analyzed. The results show that in the IEC standard voltage and current scopes of electric meters are wider and influence quantity test items including conduction differential mode current are added;in addition,specifications and immunity evaluation methods for DC electric meters must be improved as soon as possible so that the DC electric energy meters can better fulfill the requirements of engineering practice.