An intelligent islanding technique considering load balance for distribution system with DGs

The island is an important operation mode of distribution system with distributed generators. The principles of islanding are presented. Based on the simplified model of distribution system, a new concept of cell is defined and an islanding mathematic model as well as a heuristic islanding algorithm through combining cells is proposed. The algorithm can well satisfy the constraint conditions while the process of islanding, and achieve a feasible islanding scheme in a short time. Thus, the operation mode of distribution system can change swiftly under fault states. The load grade attribute is utilized to enhance islanding algorithm selective to load. Thus, the method ensures not only priority services for important loads, but also be compatible with the under-frequency load shedding

[1]  Roger C. Dugan,et al.  Operating conflicts for distributed generation on distribution systems , 2001, 2001 Rural Electric Power Conference. Papers Presented at the 45th Annual Conference (Cat. No.01CH37214).

[2]  J. B. Davies,et al.  System islanding considerations for improving power system restoration at Manitoba Hydro , 2002, IEEE CCECE2002. Canadian Conference on Electrical and Computer Engineering. Conference Proceedings (Cat. No.02CH37373).

[3]  Ding Xu,et al.  Optimal load shedding strategy in power systems with distributed generation , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).

[4]  Cheng Hong.  A SIMPLIFIED MODEL FOR DISTRIBUTION SYSTEM , 2001 .

[5]  K. Rajamani,et al.  Islanding and load shedding schemes for captive power plants , 1999 .

[6]  A. Girgis,et al.  Effect of distributed generation on protective device coordination in distribution system , 2001, LESCOPE 01. 2001 Large Engineering Systems Conference on Power Engineering. Conference Proceedings. Theme: Powering Beyond 2001 (Cat. No.01ex490).