DC/DC with MPPT for solar panels

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  1. - 26th May 2009, 10:56 #1
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    Default DC/DC with MPPT for solar panels

    Good day,
    I will like to experiment solar panels ( PV ) using a DC/DC converter with the MPPT Max Power Point Tracking. I did plan to use a PIC Micro PWM for this purpose.
    Is there any idea or a sample code to be used as a reference for the DC/DC with MPPT ?
    Any help is appreciated.
    Thanks
    Ambrogio
    North Italy
  2. - 26th May 2009, 11:31 #2
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    All you need is something like this.
    http://www.national.com/mpf/LM/LM2588.html
    Dave
    Always wear safety glasses while programming.
  3. - 26th May 2009, 13:14 #3
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    Hi,
    I saw the national componed suggested by you.
    It is a general purpose switcher and it is very good.
    The thing i would like to implement is the MPPT in order to get the PV maximum efficiency in any momemt of the daylight condition.
    I am really searching for a sample code in order to implement the Max Pwr Point Tracker and a DC/DC switcher program using a PIC pwm.
    Thanks
    Ambrogio
  4. - 26th May 2009, 14:02 #4
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    Type "sun tracking" into the search tool.
  5. - 26th May 2009, 14:19 #5
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    Quote Originally Posted by jderson View Post
    Type "sun tracking" into the search tool.
    I am really searching for a basic code that allows to maintain the max power output from a PV. So the V*I ( pv parameters) is to be maintained to the max . I plan to play with the duty cycle of the DC DC in order to "track" that max power out from the PV.
    I do not want to track the sun position during the day by rotating the PV.

    Thanks.
    Ambrogio
  6. - 26th May 2009, 14:24 #6
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    Pic Assembly code example - scroll down page to MPPT-4.2:
    http://www.drgw.net/workshop/MPPT/mppt.html

    http://www.electro-tech-online.com/m...-picbasic.html C code

    http://electronicdesign.com/Articles...ArticleID=6262 LTC1149

    http://www.solarbuildings.ca/c/sbn/f...for%20MPPT.pdf nice paper on subject

    Hopefully one of these will help. Keep us posted on your project. I have an interest, as I have a couple C-40 charge controllers for this system. MPPT would be nice!

    Name: kd6vyv.jpg Views: 10225 Size: 21.9 KB
    Last edited by ScaleRobotics; - 8th September 2011 at 22:50.
  7. - 26th May 2009, 15:30 #7
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    One more link http://www.wseas.us/e-library/transa...008/27-545.pdf

    And some good information, if you look hard enough here. With some C examples in the .rar files https://sites.google.com/a/l2na.com/...me/attachments
    Last edited by ScaleRobotics; - 26th May 2009 at 15:46.
  8. - 2nd July 2009, 03:58 #8
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    Default DC/DC with MPPT for solar panels

    I'm working on a boost DC/DC converter to charge a 12V sealed lead acid battery from a solar panel at the moment. Basically, I've replaced ... I have however an old articel that descripes how to do a MPPT with a LTC1149. ...
    www.edaboard.com/ftopic99450.html


    Discussions and Opinions about dcdc converter - search results on edaboard.com. ... No new posts, Electronic Elementary Questions · Solar Panels 9v ...
    www.edaboard.com/search,dcdc-converter.html
  9. - 30th March 2010, 18:28 #9
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    Default Maximum Power MPPT

    Looks like I missed Microchip's application note on MPPT AN1211

    http://ww1.microchip.com/downloads/e...tes/01211A.pdf

    and missing wire in their schematic:

    http://www.microchip.com/forums/tm.aspx?m=487707
    Last edited by ScaleRobotics; - 30th March 2010 at 18:42.
  10. - 5th October 2010, 03:19 #10
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    Default Micro Inverter dspic based reference design by Microchip

    Microchip has a micro inverter reference design with MPPT here:
    http://www.microchip.com/stellent/id...cName=en551429

    Name: 133216-1.jpg Views: 11721 Size: 34.8 KB

    Key Features:
    • Peak efficiency of 95%
    • Output current THD < 5%
    • Power factor >0.95
    • Maximum power point tracking
    • Grid voltage and frequency tracking
    • Protection against various current and voltage faults
    • Night time power consumption <1W
    • System Islanding to detect grid failure
    • Full Digital Control

    Specifications:
    • Micro Inverter for individual PV Module up to 220W
    • Wide PV Panel voltage : 25V to 55V DC
    • Maximum Power Point Tracking voltage: 25V to 45V
    • Maximum DC short circuit current : 10A
    • Grid Frequency range :

    47 – 53 Hz for 220V systems
    57 – 63 Hz for 110V systems
    • Grid voltage range :

    90V – 140V for 110V systems
    180V – 264V for 220V systems
    Attached Images Attached Images
    Last edited by ScaleRobotics; - 6th July 2012 at 15:31. Reason: updated link
    http://www.scalerobotics.com
  11. - 14th May 2013, 02:26 #11
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    Default Re: DC/DC with MPPT for solar panels

    Hi People

    I need help with my final year project here too.
    My project is to design a power optimizer which need microcontroller to program MPPT to control the dc-dc converer.
    Things that i need to source out are the microcontroller (which i've brought microchip PICkit 2 starter kit), dc-dc converter (no idea wht is compatible to microchip starter kit), voltage and current sensor.
    Can anyone suggest what is the dc-dc converter you are using? And is there any consideration i need to take note of when building power optimizer?
    Sorry i am quite noob with this.

    Clark86
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