Microgrid operation control and protection

Do microgrids need different control and protection schemes?

However, they also introduce several major challenges regarding the operation, control, and protection of microgrid. Furthermore, each mode of operation (grid connected or islanded) requires unique control and protection schemes. In literature, several methods have been proposed for the successful operation of microgrids.

How are microgrids controlled?

The control of microgrids is operating in different levels of a hierarchical control approach . These levels are called local control, secondary control, central/emergency control, and global control . While the primary control is applied to maintain the system stability, it can lead to undesirable frequency deviations.

Are microgrids a key component in the transition from conventional power system?

5. Conclusion Development of microgrids and the integration of renewable energy resources are the key components in the transition from the conventional power system to smart grid system. In this paper, major challenges in planning, operation, control and protection of islanded microgrids are presented.

How to protect microgrids?

Modified power flow approach was identified as the solution for the planning and operation of islanded microgrids. Bidirectional and differential relays can be an effective solution for the protection of microgrids. Finally, energy storage devices are the key technology for the intermittent renewable energy resources.