Protection of single busbar substations through coordination between overcurrent IEDs and the transformer differential based on IEC 61850

The purpose of this research is to apply the IEC 61850 standard to implement a protection methodology for reliable coordination between overcurrent protections and transformer differential. It solves a typical problem of unwanted operation in a single bar substation protection system. The development of this paper demonstrates that the use of IEC 61850 standard can provide a real-time control system capable of scanning the network every time an event occurs, guaranteeing the selectivity and reliability of the protection scheme, as well as of the whole electric power system (EPS). The scope of the project is limited to the configuration of communication parameters, the IEC 61850 standard, and the protection settings of intelligent electronic devices (IEDs). As part of the setup, development and analysis, GOOSE messaging for decision making stands out over the wired signals during. Therefore, based on the results of simulations and tests, it is recommended to implement the IEC 61850 standard for EPSs in order to improve protection reliability and reduce maintenance costs.