Method for judging accuracy of harmonic impedance calculation result

The invention discloses a method for judging the accuracy of a harmonic impedance calculation result. The method comprises the following steps: dividing nonlinear users into two types according to the operation stopping condition of the nonlinear users: only cutting off a harmonic source while keeping the user side impedance of the nonlinear users connected with a power grid (such as a photovoltaic station), and cutting off the harmonic source and the user side impedance (such as an electric arc furnace); determining the difference between the IEC method and the superposition principle method and the application range of the IEC method and the superposition principle method in the process of verifying and obtaining the accuracy of the harmonic impedance; based on the characteristics of the two methods and the category of nonlinear users, the invention provides a method capable of accurately verifying and obtaining the correctness of harmonic impedance. 本发明公开了一种谐波阻抗计算结果准确性判断方法，将非线性用户根据其停止运行的情况分为两类：仅切断谐波源而保留其用户