One of the important features of the smart grid is the integration of renewable energy sources (such as wind and solar). Each micro-grid provides electricity to the customers as the combination of renewable and non-renewable energy sources. Therefore, the micro-grids first use the renewable energy produced by itself, and then, take remaining required energy from the main grid. Consequently, if there is any problem with the main grid, still, the micro-grids can provide electricity to the customers, and thus, supports the distributed architecture of the smart grid instead of the centralized one. Additionally, with the availability of renewable energy sources, micro-grids can provide electricity in a cost-effective and reliable manner.

There are several existing works related to the renewable energy and smart grid. Some of them address the following issues:

1. Dealing with the intermittent behavior of the renewable energy sources, while integrating it with the smart grid.

2. Impact of self-generated energy sources in the smart grid - load shifting, minimization of energy cost, providing uninterrupted energy service etc.

I would suggest to go through some papers related to integrating renewable energy sources in smart grid published in IEEE Trans. on Smart Grid.

You can also refer to the book entitled "Design of Smart Power Grid Renewable Energy Systems", Wiley Publication, 2011

One of the important features of the smart grid is the integration of renewable energy sources (such as wind and solar). Each micro-grid provides electricity to the customers as the combination of renewable and non-renewable energy sources. Therefore, the micro-grids first use the renewable energy produced by itself, and then, take remaining required energy from the main grid. Consequently, if there is any problem with the main grid, still, the micro-grids can provide electricity to the customers, and thus, supports the distributed architecture of the smart grid instead of the centralized one. Additionally, with the availability of renewable energy sources, micro-grids can provide electricity in a cost-effective and reliable manner.

There are several existing works related to the renewable energy and smart grid. Some of them address the following issues:

1. Dealing with the intermittent behavior of the renewable energy sources, while integrating it with the smart grid.

2. Impact of self-generated energy sources in the smart grid - load shifting, minimization of energy cost, providing uninterrupted energy service etc.

I would suggest to go through some papers related to integrating renewable energy sources in smart grid published in IEEE Trans. on Smart Grid.

You can also refer to the book entitled "Design of Smart Power Grid Renewable Energy Systems", Wiley Publication, 2011

The renewable energy sources have highly variable daily and seasonal patterns, and consumer power demand requirements are also extremely variable in nature. Therefore, it is difficult to operate a stand-alone power system supplied from only one type of renewable energy resource unless there are appropriate energy storage facilities. If enough energy storage capacity is not available, especially in medium to large scale systems, a grid connected renewable power generation may be the only practical solution. Please see the following recent publications for more information:

[1] M. R. Islam, Y. G. Guo, and J. G. Zhu, “A high-frequency link multilevel cascaded medium-voltage converter for direct grid integration of renewable energy systems,” IEEE Transactions on Power Electronics, vol. 29, no. 8, pp. 4167-4182, Aug. 2014.

[2] M. R. Islam, Y. G. Guo, and J. G. Zhu, “A multilevel medium-voltage inverter for step-up-transformer-less grid connection of photovoltaic power plants,” IEEE Journal of Photovoltaics, vol. 4, no. 3, pp. 881-889, May 2014.

http://scholar.google.de/scholar?hl=en&q=microgrids&btnG=&as_sdt=1%2C5&as_sdtp=

Dear Saumenda, in our system we integrate renewables with the microgrid and control

the system the  as a whole. This gives the benefit of more effective use of solar heat for

example, optimizing delivery the the microgrid. 

https://www.researchgate.net/publication/263085644_Combined_Solar_Heat_and_Power_With_Microgrid_Storage_and_Layered_Smartgrid_Control_Towards_Supplying_Off-Grid_Rural_Villages?ev=prf_pub

Article Combined Solar Heat and Power With Microgrid Storage and Lay...

"Grid Converters for Photovoltaic and Wind Power System", John Willey Publication, 2011.