Key technologies of digital substations and related engineering implementation

The digital substation,which is based on the three-layer structure(the substation level,the bay level and the process level) described in the IEC 61850 standard,has become the hot topic of power system study in recent years.The characteristics and structure of the digital substation,as well its related research both at home and abroad were illuminated.The key technical problems in digital substation implementation were analyzed,and relevant solutions were studied.The implementation scheme for a 110 kV digital substation in construction in Shanghai was recommended.