电能质量问题包括以下几种：电涌、电压闪变、断电、谐波等。

There are several power quality issues such as power surges, voltage sags, outages, harmonics, etc.

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针对使用中出现的发热、振动、干扰与谐波等问题提出处理意见。

Aimed at producing heat, vibration, disturbance and harmonic wave, the handling opinions are pointed.

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本文分析了目前纺织厂通风机可控硅串级调速四种主电路方案的特点、效率和谐波等情况。

This paper analyses the characteristics, efficiency and harmonic of four kinds of power circuits for SCR-cascade control used in textile mill ventilators.

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