防止并联电容器运行中产生谐波放大

Prevention of Harmonic Amplification in Operation of Parallel Capacitor

为防止并联电容补偿装置投运后的谐波放大 ,装置的串联谐振频率应小于谐波源最小谐波频率。选取适当电抗率和改变电容装置串、并联谐振频率的方法 ,可使放大区躲开谐波源频率以避免谐波放大。分析探讨了谐波放大原理并验证了上述结论后将其用于茅箭变电站 ,较好地解决了谐波放大问题。

In order to prevent harmonics from amplification, which may occur while compensation capacitors connected in parallel putting into operation in power system, the frequency of series harmonicof compensation device should be smaller than that of the minimum harmonicof harmonic source. By selecting proper reactance and modifying harmonicfrequency of capacitors, the frequency of harmonicsource could be avoided. The mechanism of harmonic amplification has been analyzed and the conclusion mentioned above has been proved and applied successfully in a substation.