Smart-grid based substation testing simulator design for the South Korean power distribution system

In this paper, we present a smart grid (SG)-based substation testing simulator (STS) design for the South Korean power distribution system. The presented STS can serve as both a test bed for new devices and as a training facility for education. It features closed-loop testing, and reflects both control/protection functions within the substation and interaction with the Web or a telecontrol system (IEC61850, DNP, IEC60870-5, Modbus, etc). This STS can save certification time for the domestic/international standard fitness required for developed devices before a field test. The constituted algorithms have substation topology processing, relay action sequence, and state estimation. The substation data can be stored in a database management system (DBMS) after the effective analysis for the results of the SG-based STS. For the development of a new system and an educational environment, the concept of open systems is applied to a substation testing system. The proposed STS will be designed on a substation structure in the Korea Electric Power Corporation (KEPCO).