and conditioning system for digital substation

 

 

 

JIN Naizheng1, ZHANG Liang1, ZHANG Jianmin2,

WANG Yan3, ZHANG Lizong1, XV Weiguo1

 

(1. Stafe Grid Shaoxin Power Supply Company, Shaoxin 312000, China; 2. Automation College of Hangzhou Dianzi

University,  Hangzhou 310018, China; 3. Nanjing Tuowei Electric Sci.& Tech. Ltd, Nanjing 210016, China)

 

 

Abstract: Aiming at realtime monitoring and state conditioning of intelligent electric devices (IEDs) and communication of digital substation, the fault sources and fault mechanisms were carefully studied, and the faults were classified into two categories as names of background faults and application faults, from which the contents of monitoring were clearly defined and two types of new IEDs were developed in names of online precaution terminals and subsystem devices. As the new types of IEDs in digital substation, their information modeling and communication modeling were discussed in detailed way, in order to follow the IEC 61850 standard which is the fundamental requirement for all IEDs in digital substation. The communications between online precaution terminal, subsystem and the master station in control center, as well as the function designs of master station, were also discussed. The successful real operation indicates that such a system has features of rich functions, standardized information modeling and integration, which can meet the requirement of realtime monitoring and state conditioning of IEDs and communication of digital substation.