Insights on a mini-AC grid design

aniraula · 03-10-12, 10:27 AM

Hey all,

I have been working on a design of a mini-AC grid that is a hybrid PV-diesel-battery system.
Since majority of the load is used during daylight hours, I was thinking of using large grid tied inverters to directly power the loads and reduce the size of the batteries which are very expensive and have a lesser lifetime. The batteries will store only the excess power and discharge during the night(when the loads are much lesser). I am thinking this would be a way to minimize the use of diesel generators and at the same time make use of the cheaper grid-tie inverters. Diesel Generators will only function as a back-up (for cloudy days).
I would love to hear some of your comments and feedback on the design and what are the issues that I might have to contend with here. I have attached a block diagram here as well.

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Regards,

03-10-12, 10:27 AM	#1
aniraula Lurking Renovator Join Date: Mar 2012 Location: Nepal Posts: 5 Thanks: 0 Thanked 0 Times in 0 Posts	Insights on a mini-AC grid design Hey all, I have been working on a design of a mini-AC grid that is a hybrid PV-diesel-battery system. Since majority of the load is used during daylight hours, I was thinking of using large grid tied inverters to directly power the loads and reduce the size of the batteries which are very expensive and have a lesser lifetime. The batteries will store only the excess power and discharge during the night(when the loads are much lesser). I am thinking this would be a way to minimize the use of diesel generators and at the same time make use of the cheaper grid-tie inverters. Diesel Generators will only function as a back-up (for cloudy days). I would love to hear some of your comments and feedback on the design and what are the issues that I might have to contend with here. I have attached a block diagram here as well. Regards,