Control strategy of distributed generators in microgrid

Microgrid is a newly proposed organization of distributed generation system. It can operate in net-connected mode and islanded mode, when the operation switches between the two types of mode, the variety power will emerge. If this happens, the level of the system voltage will be fluctuating in a wide range, and the system frequency will also be fluctuating in an unacceptable range. The load power supply will be influenced seriously. To minimize the influence on load power supply, in this paper we adopt two different types of control strategy: invariable power control and invariable voltage control. Appling them to the distributed generators in different operation mode, we established simulation models. The result proves that the control strategy is valid.

[1]  K.Y. Lee.  The effect of DG using fuel cell under deregulated electricity energy markets , 2006, 2006 IEEE Power Engineering Society General Meeting.

[2]  N. Miller,et al.  Report on Distributed Generation Penetration Study , 2003 .

[3]  A. Sannino,et al.  Feasibility of a DC network for commercial facilities , 2002, Conference Record of the 2002 IEEE Industry Applications Conference. 37th IAS Annual Meeting (Cat. No.02CH37344).

[4]  P.W. Lehn,et al.  Micro-grid autonomous operation during and subsequent to islanding process , 2005, IEEE Transactions on Power Delivery.

[5]  Peter W. Lehn,et al.  Microgrid autonomous operation during and subsequent to islanding process , 2004 .

[6]  Timothy C. Green,et al.  Real-World MicroGrids-An Overview , 2007, 2007 IEEE International Conference on System of Systems Engineering.

[7]  Chris Marnay,et al.  Integration of distributed energy resources. The CERTS Microgrid Concept , 2002 .

[8]  A. Sannino,et al.  Low-Voltage DC Distribution System for Commercial Power Systems With Sensitive Electronic Loads , 2007, IEEE Transactions on Power Delivery.

[9]  J.A.P. Lopes,et al.  Defining control strategies for MicroGrids islanded operation , 2006, IEEE Transactions on Power Systems.