Power system of electric-driven dumper, electric-driven dumper and power switching method of electric-driven dumper

The invention discloses a power system of an electric-driven dumper, the electric-driven dumper and a power switching method of the electric-driven dumper. The power system comprises an external drive system, a detecting element and a control device, wherein the external drive system comprises a bow collector; the detecting element detects the traveling state of the electric-driven dumper and transmits a traveling state signal to the control device; the control device determines the power mode required by the electric-driven dumper according to the traveling state signal. Under an external power mode, the control device controls the bow collector to contact with an alternating-current wiring system to introduce alternating currents obtained from the alternating-current wiring system to serve as the power source of the external drive system, large power can be provided for the electric-driven dumper and especially the heavy-loaded electric-driven dumper climbing up a slope, and accordingly the speed of the electric-driven dumper can be increased, and production efficiency can be further increased.