Modeling of a Centralized Microgrid Protection System and Distributed Energy Resources According to IEC 61850-7-420

Taha Selim Ustun, Cagil Ozansoy, Aladin Zayegh
2012 IEEE Transactions on Power Systems  
Microgrids have been proposed in an effort to handle the impact of distributed generators (DGs) and make conventional grids suitable for large scale deployments of DGs. However, the introduction of microgrids brings some challenges such as the protection of a microgrid and its entities. Due to the existence of generators at all levels of the distribution system, the fault currents vary substantially. Furthermore, grid connected and islanded modes introduce two different sets of fault currents.
more » ... onsequently, the traditional fixed current relay protection schemes need to be improved. The authors developed a new protection system which utilizes extensive communication to monitor the microgrid and update relay fault currents according to the variations in the system. This system is designed to respond to dynamic changes in the system such as connection/disconnection of DGs. This paper presents the modeling of a microgrid protection system with logical nodes provided in IEC61850 and IEC61850-7-420 communication standards. It also demonstrates how the proposed communication takes place through logical nodes. Firstly, models for different DGs are provided to detail the implementation of the said logical nodes. Then, a case study is given on a sample microgrid to show how the proposed protection scheme can be run based on these models. His research interests are power systems, power electronics, distributed generation, microgrids, and smartgrids. Cagil Ozansoy received the B.Eng. degree in electrical and electronic engineering (Hons.) from Victoria University, Melbourne, Australia, in 2002. In 2006, he received the Ph.D. degree in the area of power system communications. He is now working as a lecturer and researcher in the School of Engineering and Science, Victoria University. His major teaching and research focus is on electrical engineering, renewable energy technologies, energy storage, and distributed generation. He has successfully carried out and supervised many sustainability related studies in collaboration with local governments in the past. He has over 25 publications detailing his work and contributions to knowledge. Aladin Zayegh received the B.E. degree in electrical engineering from Aleppo University, Aleppo, Syria, in 1970 and the Ph.D. degree from Claude Bernard University, Lyon, France, in 1979. He has held lecturing position at several universities, and since 1991, he has been at Victoria University, Melbourne, Australia. He has been head of school and research director where he has conducted research, supervised several Ph.D. students, and published more than 250 papers in peer-reviewed international conferences and journals. He is currently an
doi:10.1109/tpwrs.2012.2185072 fatcat:z424qboe4jflza22drk53ogspq