secondary harmonic

But inverter has its own inherent characteristics, and the output voltage contains much more high secondary harmonic component.

但是由于逆变器固有的特性，导致其输出电压中含有较多的高次谐波分量。

This paper introduces the fault finding procedure of frequently and secretly trips for circuit breaker at mid-voltage side of a 110 kV substation on the following aspects: secondary circuit, harmonic effect, protective device, etc. A treatment method is also offered as a reference.

针对某110kV变电站主变中压侧开关频繁偷跳的现象，从二次回路、谐波影响、保护装置等方面介绍了故障排查过程，井给出了解决办法。

The results also indicate that when special filters are connected to secondary three-phase system, the primary harmonic currents decrease by about 28% than by using conventional two-phase filters.

结果还表明，当在二次侧三相系统接入文中提出的特殊滤波器时，谐波电流比用常规两相滤波器降低约28%。

Research on national secondary standard and harmonic standard of industrial frequency three-phase electric energy metrology

工频三相电能国家计量副基准和谐波计量标准的研究