Why does the power plant output alternating current instead of direct current?

Ordinary transformers can only input and output alternating current. In order to reduce the loss of long-distance transmission, high voltage and low current must be adopted. At present, DC transmission adopts alternating current to boost the voltage first, then convert DC into alternating current after reaching the destination, and then step down. This can avoid the power consumption problem caused by capacitive reactance in AC transmission. DC transmission transmits electrons, just like the heart pumping blood. When the blood reaches the capillary at the end of the limb, there is basically no blood pressure. Similarly, DC transmission, most of the voltage will be consumed by transmission wires, which not only limits the transmission distance, but also has extremely low effective utilization rate. AC power transmission transmits an energy field, and it induces AC through wires in the form of electromagnetic induction at a long distance, which basically consumes no voltage and has a very high energy utilization rate.