How to solve the mutual interference problem when multiple power circuits are connected to the power supply DTU?

To resolve mutual interference from multiple power access circuits in a DTU, isolation and frequency domain separation are required. Each circuit uses an independent isolation transformer with a high-permeability ferrite core (such as PC44). Different sampling sequences are assigned to different circuits to avoid simultaneous sampling. Shielding plates are deployed between sampling channels to reduce magnetic field coupling. Mutual interference is identified through software algorithms and compensated by digital filtering. In actual testing, the sampling error of each circuit should be less than 0.5% when multiple circuits are operating simultaneously. Resolving mutual interference improves the accuracy of the system in multi-circuit applications and is suitable for power distribution monitoring.