1) Try to choose a low-loss, high-efficiency and energy-saving transformer 2) According to the load situation, choose a transformer with a reasonable capacity 3) The average load factor of the transformer should be greater than 70% 4) When the average load factor is often less than 30%, a small-capacity transformer should be replaced as appropriate 5) Improve the load power factor to improve the transformer’s ability to transmit active power 6) Reasonably configure the load to minimize the number of transformers in operation.