This paper gives a method of shunt capacitors protection exposed to harmonic over-voltage, the algorithm for the r.m.s and crest values of the waveform and the scheme of choosing the r.m.s voltage.

• 给出了谐波条件下的并联电容器过电压保护的一种实现方法，介绍了实际电压有效值和峰值的计算方法和有效值选取的原则。