Power hardware-in-the-loop(PHIL)simulation

combined with the advantages of dynamic physical simulation and real-time digital simulation

is effective for the study and analysis of complex power systems. Interface algorithm is the key to guarantee closed-loop stability and accuracy of the simulation system. The overall structure of PHIL simulation system is presented

then the basic principle

modeling methods

existing problems and improved methods of the existing interface algorithms are analyzed in detail. The stability and accuracy of ideal transformer model interface

transmission line model interface and damping impedance method interface are verified by simulation. The application fields of various algorithms are summarized. Finally

the key technical issues to be solved and the future development direction are put forward for the interface algorithms of PHIL simulation. This work is supported by Science and Technology Development Plan of State Grid Corporation of China(No. NEDU 20150002).