As for the unfavorable effect due to voltage transformer in the harmonic power calculation of the actual project

in this paper

a kind of method to deal with influence of voltage transformer on harmonic apparent power calculation using probability density function is proposed.The 10-cycle probability density function r.m.s.is derived with this method through that of 150-cycle.The apparent power density function is obtained through the relationship between the apparent power and voltage as well as current and the influence coefficient of voltage transformer is added in the apparent power expression.The applicability of the method is shown by the simulation value and the actually measured data.