IEC 61850 Model Expansion Toward Distributed Fault Localization, Isolation, and Supply Restoration

In a smart-grid environment, more intelligent, distributed control devices will be deployed in the distribution network to significantly enhance reliability and flexibility. Distributed fault localization, isolation, and supply restoration (FLISR) are examples of such important applications. These devices need a standard model to share information with each other and support interoperability of intelligent electronic devices from different manufacturers. IEC 61850 has been developed as a series of standards to facilitate interoperability of substation automation systems (SAS). Earlier efforts focus on the application of IEC 61850 to a distributed FLISR system. However, the difference between SAS and FLISR has not been addressed. In this paper, an IEC 61850 model expansion toward a distributed FLISR system is proposed based on the requirement analysis of a variety of distributed FLISR modes. Moreover, a typical breaker-level switch-mode FLISR algorithm is studied as an example to demonstrate the benefits of the proposed model. The correctness and security of the proposed model and algorithm are verified by the model checker and tested in an intelligent distribution simulation system.