摘要：本文介绍了变频器谐波对电网的影响，以及我国对电网谐波的标准和计算方法。从而，提出了西门子工程型变频器的一种谐波计算方法。为读者今后在选用西门子变频器时，评估变频器系统对自身电网的谐波影响提出了宝贵的建议。

关键词：变频器；谐波计算；西门子

Abstract: This paper introduced Influence of harmonic for converter on the power grid, and harmonic standard and calculation methods in China. Therefore, the paper proposes a kind of harmonic calculation method for Siemens engineering type converter. It is a useful suggestion to evaluate influence of harmonic for converter system on their own gri