Accurate estimation of losses in high-power traction converters is essential for an effective design. Precise estimation of switching and conduction losses is crucial for this purpose. In this paper, the widely recognized Double Pulse Test (DPT) is employed to determine these losses. However, time-shift errors and misalignments in measurements can lead to significant deviations in loss estimation of the actual setup. This paper introduces a postprocessing method aimed at mitigating time-shift and misalignment issues in voltage and current waveforms. The proposed method is validated through simulation, demonstrating its effectiveness in improving the accuracy of loss estimation for high-power traction converters.