The reasons and harm of high harmonics in the substation of electric arc furnace, and some measures of avoiding and decreasing the high harmonics are put forward after careful analysis.

• 通过对电弧炉变电所在运行过程中出现的现象进行分析研究，指出了高次谐波产生的原因及其危害，提出了防止和减少高次谐波的措施。