A centralized protection and control scheme for microgrid

The flexible operation modes of microgrid result in an extreme challenge for the protection and control of microgrid. Therefore, this paper proposed a centralized protection and control scheme for microgrid. To identify the faulted region conveniently, the microgrid is divided into several zones in advance. Intelligent circuit breakers communicate with each other, then send real-time information by channels to the central protection and control system (CPCS) for fault analysis. Taking advantage of characteristics of superimposed component currents through adjacent nodes, CPCS can fast identity the faulted zone. Additionally, an identification flowchart is also presented. A simple microgrid model is constructed using PSCAD, and simulation results show the validity of proposed centralized protection scheme.

[1]  Taha Selim Ustun,et al.  A microgrid protection system with central protection unit and extensive communication , 2011, 2011 10th International Conference on Environment and Electrical Engineering.

[2]  Wang Jun-cheng.  Analysis of microgrid protection , 2012 .

[3]  H J Laaksonen,et al.  Protection Principles for Future Microgrids , 2010, IEEE Transactions on Power Electronics.

[4]  Poh Chiang Loh,et al.  Protection of Microgrids During Utility Voltage Sags , 2006, IEEE Transactions on Industrial Electronics.

[5]  Yang Juan.  Region division strategy of micro-grid intelligent protection , 2011 .

[6]  E. Sortomme,et al.  Fault analysis and protection of a microgrid , 2008, 2008 40th North American Power Symposium.

[7]  Dou Xiaobo.  Branch Directional Variation Protection of AC Microgrid , 2012 .

[8]  Fan Yong.  Thought About Protection of Distributed Generation and Microgrid , 2010 .

[9]  H. Nikkhajoei,et al.  Microgrid Protection , 2007, 2007 IEEE Power Engineering Society General Meeting.

[10]  Lu Jinfeng,et al.  Hierarchical Coordinative Protection of Microgrid , 2013 .