Hydraulic excavator system is composed of power system, hydraulic system, transmission system and walking system. Each system adopts discontinuous strategy to combine, and realizes excavation operation by changing excavator position and adjusting excavator state. Because there is a certain consumption in the cooperation between the systems, the energy consumption and reactive power loss will appear in the system during the operation of the hydraulic excavator, forming the energy loss in the work of the hydraulic excavator, which is an inevitable objective phenomenon in the work of the hydraulic excavator.
