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steve.taranovich
steve.taranovich
6/20/2013 10:06:46 AM
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Re: A bit of simplification, based on the application.
Good points WKetel. Cost vs. accuracy is a key compromise in Solar and as long as it is accurate enough for the particlar application---that's what will decide the ratio of the compromise.

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WKetel
WKetel
6/20/2013 7:51:54 AM
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A bit of simplification, based on the application.
Most solar power installations feed a definite load, which normally requires a specific  voltage. Even charging batteries, the required voltage does not change much, and is well defined. The result is that instead of needing to compute maximum power, aiming for maximum load current becomes a much simpler method of aiming for maximum power. In addition, using analog calculations makes the task even simpler. The target power level is also predictable, so that an initial start point can be set, instead of the system needing to start from zero each time. 

One other question that I have is how close to the absolute maximum peak must we really be? Backing off on accuracy just a bit is typically a great cost reducer in most situations, probably here as well.

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Netcrawl
Netcrawl
6/8/2013 6:35:51 PM
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Master
Re: MPPT CONTROLLER
Innovation is happening in all stages of the PV space, it continue to show steady activty, growing fast, especially in China where its seen a lot of potential. But I think we still lack some innovation here, we need some plenty of room for improvement. 

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DaeJ
DaeJ
6/8/2013 11:12:48 AM
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Re: MPPT CONTROLLER
Japan has top spot in the PV industry and span a big range of 6.9 -9.4 GW. That will put Japan ahead of China and USA as well as other regions. IHS indicates that Japan's share of the global PV system revenue is increased from 14 percent in 2012 to 24 percent in 2013. PV system of Japan is very costly and good quality.   

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Dirceu
Dirceu
6/7/2013 1:31:44 PM
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Re: Cost: digital x mcu
Brad,

   what would be a good challenge, since the architecture of the solution is relatively simple, but the problem is always the free time. Your suggestion is also valid for other participants as well.

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Brad Albing
Brad Albing
6/6/2013 5:56:33 PM
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Re: MPPT CONTROLLER
OK - makes sense - might not need to span as many time zones as I thought at first.

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Brad Albing
Brad Albing
6/6/2013 5:55:04 PM
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Re: Cost: digital x mcu
@Dirceu >>would be interesting to see a comparison with an implementation on a low cost microcontroller - Perhaps you could write such a blog for us?

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steve.taranovich
steve.taranovich
6/5/2013 8:27:17 PM
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Re: Power Conversion Efficiency for MPPT Controller
All good methods that will get us to ROI much faster than today!

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steve.taranovich
steve.taranovich
6/5/2013 8:23:19 PM
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Re: MPPT CONTROLLER
No that's taking efficiency to the next level, jbike---all good suggestions

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Dirceu
Dirceu
6/5/2013 11:00:58 AM
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Artist
Cost: digital x mcu
   The blog claims that one of the main advantages is the cost of implementation with digital gates - and the approach is understandable, since this to be a forum on analog. But also would be interesting to see a comparison with an implementation on a low cost microcontroller such as an ARM Cortex-M0 (0.9 DMIPS/MHz, with 8 or 20 pins). Of course, there is the additional cost for the firmware development.

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