Principal Control Methods of Harmonic Level in Power System

To control harmonic voltage lever in power system,there are different stipulations related to the connection of large and medium-size nonlinear consumers to power grid in the standards of IEC,IEEE and U.K.standard G5/4 and so on.On the basis of briefly presenting related stipulations in above-mentioned standards,the features of them are analyzed and corresponding suggestions for the revision of national standard,namely the GB/T 14549—1993,are propounded.