Digital twin is the key technology of digitalization transformation in power equipment industry. In this paper

a general digital twin architecture of power equipment is proposed after analyzing current research status. Based on industrial development

four important technologies in simulation and modeling are defined

such as unified information modeling

multi-level simulation modeling

multi-parameter multi-physics inversion

and multi-dimensional complex information synthesis and visualization analysis. In addition

typical applications

current deficiencies

and future focus of this technology

in the aspect of intelligent design and manufacturing

dynamic management of supply chain

and operation and maintenance

are also discussed. Moreover

the prospects in the changes of the relevant industries brought by digital twin technology are presented

which can serve as a good reference for digitalization transformation of power equipment industry.