Necessity of transmission protocol certification and the realization method

In application of IEDs to electric power system, the uncertainties in contents of different protocols, the vari-ance of protocol translation, and the uncompletion in protocol realization are the main problems influencing the stabili-ty of the grid's automatic dispatching system, and application upgrading based on information share. The necessity andmeaning of protocol certification are expatiated from the view of information utilization in electric power system, andthe fundamental principles that should be followed in protocol certification are put forward consulting internationalpractice. The final effects of protocol certification are also explained.