Abstract:The synchronization of electronic transformer data is introduced. Synchronization method commonly used is analyzed in terms of their advantages and disadvantages. Then,a new approach based on Newton interpolation is presented,and the simulation and error analysis are given. The theoretical analysis shows that this method can reach the same precision with Lagrange interpolation which is accurate in synchronization of harmonic components and obtain the synchronized data fast. Finally,equal interval sampling and non-equal interval sampling data are set,and the maximum error in the case of the steady state and transient state are calculated respectively by using matlab. The simulation results prove the feasibility and the engineering practical value of this method.