Method for adjusting impedance of grounding transformer through leakage flux

The invention provides a method for adjusting impedance of a grounding transformer through leakage flux. The method comprises the following steps: firstly, setting the impedance height of an outer coil of the transformer as h2 and the impedance height of an inner coil as h1, wherein h1 is more than h2; decomposing the leakage magnetic fields generated by the outer coil and the inner coil of the transformer into the following two components: a longitudinal component formed by an axial leakage magnetic field and a horizontal component formed by a radial leakage magnetic field; replacing the outer coil and the inner coil of the transformer by a coil A and a coil B; lastly, calculating the inductive reactance x1 of the coil A, the inductive reactance x2 of the coil B and the impedance xk of the grounding transformer, wherein xk is equal to x1+x2; adjusting the impedance height h1 of the inner coil according to the inputted impedance of the grounding transformer. According to the method, the impedance height is ch