What Is Transformer Load?

The average load factor of a transformer is defined as the ratio of the apparent output power of the transformer to the rated capacity of the transformer within a certain period of time. Multiply the average load factor of the load curve by a multiple greater than 1, the higher the average load factor of the load curve.

Control of core loss

No-load loss in transformer losses, that is, iron loss, mainly occurs in the transformer core laminations, mainly due to the loss caused by the hysteresis and eddy current generated by the alternating magnetic lines of force through the core. ^[1]

P0 no-load loss, mainly iron loss, including hysteresis loss and eddy current loss; ^[3]

(1) Active power loss: P = P0 + KT2PK ------- (1)

(2) Reactive power loss: Q = Q0 + KT2QK ------- (2) ^[3]

The higher the average load factor of the load curve, the smaller the loss ratio is to achieve the smaller power loss; the lower the average load coefficient of the load curve, the smaller the loss ratio is to achieve the smaller power loss. . ^[3]

Multiply the average load factor of the load curve by a multiple greater than 1, usually 1-1.3 can be taken as the load factor to obtain the best efficiency, and then calculate the loss ratio that the transformer should have according to b = (1 / R) 1/2 .

For the actual load, the transformer itself should have a better loss ratio, and the total loss is the smallest, that is, the sum of the no-load loss and the load loss should be as small as possible. ^[3]