In rural distribution networks

uneven distribution of low-voltage loads can bring about significant amplitude and phase deviations among the three-phase currents

seriously affecting the safety

stability

and economic performance of the system.If load reallocation is not performed in a timely manner

issues such as low voltage

increased line losses

and elevated risk of equipment failure may arise.Therefore

accurately

efficiently

and safely mitigating three-phase load imbalance in rural distribution networks is an urgent issue.Traditional optimization methods

such as reactive power compensation

often incur high costs and may introduce harmonic distortion.This paper analyzes the adverse impacts of three-phase imbalance-focusing on power loss

operational efficiency

and equipment safety in lines and transformers and proposes an optimization approach based on automatic phase switching.A novel automatic phase switching device is developed

which dynamically reallocates loads based on real-time low-voltage calculations

thereby ensuring long-term stable and efficient operation of low-voltage distribution substations.Simulation and field test results demonstrate the effectiveness of the proposed solution in improving transformer utilization and enhancing power quality in rural low-vol tage distribution networks.