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Grid Tie Inverter Schematic 2.0

Discussion in 'Alternative Energy' started by tcmtech, Mar 26, 2010.

  1. -nikos-

    -nikos- New Member

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    when ι design thinking to less consumption in the stimulation of transistors
    and the voltage drop at 0,7 v in each diode helps the net stimulation
    and diodes in the output transformer prevents
    entry instead of exit current would result in higher internal consumption
     
  2. tcmtech

    tcmtech Well-Known Member Most Helpful Member

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    I for one have never trusted simulation programs to be the least bit correct on these types of circuits.

    Try building it ans see what burns up first. Given your circuit layout I suspect the opto couplers with no current limiting resistors will go first. If not the lack of proper zero cross dead band adjustment will likely fry the output transistors if the high switching currents don't smoke the transformer windings first.

    Just an educated guess based on personal experimentation done over the years. For basic grid tie power handling circuits simple and robust tends to be most durable! :)
     
  3. -nikos-

    -nikos- New Member

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    perhaps the output transformer to heat up a bit
    but to be burned should compose the wrong way.
    For the rest i have to build it to express an opinion.
    if the optomosfet not withstand the stimulation of 2N3055 i will simply
    add two 2N2222 to driving it
    -

    Thanks for the reply :)
     
  4. dave

    Dave New Member

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  5. tcmtech

    tcmtech Well-Known Member Most Helpful Member

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    I view GTI design as being a minimalistic concept. low parts count with maximum working efficiency is the goal. Extra parts that serve no practical purpose on the power handling circuits cost money and waste power. Your design has a lot of needless parts and parts with the wrong values as well.

    The LM317 voltage regulator is pointless, opto isolators are completely unnecessary, there are 5 diodes that serve no purpose, a number of resistors that are of the wrong values for what purpose they do serve, and if ran at what I would call a realistic working power for a 2N3055 based switching circuit of this design on a 14 volt input I would doubt it would be reliable much above a 150 watt peak working input power with a more than likely return power of less than 100 watts.

    I am not sure of your cost for parts but if it was done with all new parts for around $100 and you have a 100w average return on power your theoretical break even run time for 10 cent a KWH electricity would be around 1000 hours running at full output not including power source design and operating costs.
     
  6. -nikos-

    -nikos- New Member

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    I see this as the best recycling an old ups.
    otherwise the money to give someone on the transformer buy a gti from ebay ready for use.

    For the rest i have to build it to express an opinion,
    but I think it the best design as a simple construction οf those which have appeared in this thread
    -if you have to propose a better then I will not have to say anything else.
     
  7. -nikos-

    -nikos- New Member

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    You 're right on several points and I did some modifications.
    Apart from the two diodes in the first transformer..
    View attachment 60537
     
  8. bucasino2004

    bucasino2004 New Member

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    Thats a very good article love it. Powermos please can you help me out with the schematics circuit design of GRID TIED PV SYSTEM WITH BATTERY BACK.The intented load is 6 volts battery charger.I want to buid and simulate it on Proteus Isis but has been having some difficulties with the the design of the grid tied pv.Will really appreciate if you help out.Thanks alot.
     
  9. mr.s.p

    mr.s.p New Member

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  10. muruganzeal@gmail.com

    muruganzeal@gmail.com New Member

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    I need transformerless grid tie inverter circuits............... Thanks in advance
     
  11. Powersim

    Powersim New Member

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    Hi, I'm a newbie here. Anyone in PEM fuel cell field? I looking at input the fuel cell with 36 to 72 Vdc. Then boost up the low dc to 400 Vdc using a boost converter. After which, using a full bridge inverter to LC filter the signal as rms grid of 220 Vac. I am using the PSIM tool. The desired output is 1 KW and 4A. Comes with MPPT control over the DC input and a unity power control over the AC output.

    Please any kind soul can help on this topic.

    Thanks a million.
     
  12. xymox

    xymox New Member

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    TCM, I love your tenacity!
    Regards,
    X
     
    Last edited: May 7, 2012
  13. tcmtech

    tcmtech Well-Known Member Most Helpful Member

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    Well I have been known for getting more than just a few the arm chair safety Nazis and lawyers undies bunched up so tight they cant walk over my showing people how to do this sort of stuff on the cheap and down low DIY level! :D
     
  14. jeanjcds

    jeanjcds New Member

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    Mr. tcmtech

    I'd like your help and approval to use its "Grid Tie Inverter Schematic 2.0". I need your help to see if this list of components that put together is sufficient to assemble the circuit on breadboard. If you have the full list and can send me would be very grateful. I have some doubts about the components, which you used in diodes D1, D2, D3 ... 1N4007? What is the relationship that you used in transformers? This right capacitors 2.2m and 2.5m? What you used resistor R5 in the "Control Circuit A"? What voltage Vdd you used in the IR2113? How to calculate L1 and L2?
    The list of components that did is this:

    Components Model / Value Amount Description
    Diode 1N4007 20
    Diode Zener 12V MZD12 2
    Diode ZR431 1
    Diode Zener 3.3V 1N4728A 1
    Voltage Regulator LM7812 1
    LM555 2
    LM2907 1
    LM324 1
    LM358 1
    IR2113 2
    Potenciometer 10k 4
    50k 2
    500k 2
    5k 1
    Optocoupler MOC3053 1
    TRIAC Q7025R5 1 It= 25 A, Vdrm = 700V, Igt=500mA
    RESISTOR 3.3 kOhm 2
    47 kOhm 3
    100 kOhm 3
    2.2 kOhm 2
    150 Ohm 2
    470 Ohm 2
    22 kOhm 1
    220 kOhm 1
    10 kOhm 5
    5 kOhm 1
    10 Ohm 1
    8 Ohm 4
    CAPACITOR 2.2 m 1
    2.5 m 1
    10 u 4
    470 u 3
    100 u 1
    100 n 2
    1 u 2
    35 u 1
    2.2 u 2
    47 n 1
    Transformer 220 / 12 + 12V 1 WITH CENTRAL TAP
    INDUCTOR FOR FILTER 2

    I'm trying to simulate the circuit, but not against the IR2113 proteus you have a library with this component? Well that's why I decided to ride it physically. Do you know if this circuit works perfectly?

    I'm sorry for my bad english.
    Very, Very Thanks!;)
    sincerely,
    Jean Carlos dos Santos
     
  15. Fendel

    Fendel New Member

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    Here in Brazil the eletronick electrick registrators used in the new stupid grids are unidirectional.
    So, if you produce more energy than you use, you have to pay for the injected energy as it is consumed from you...
     
    • Informative Informative x 1
  16. plodhi2002

    plodhi2002 New Member

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    View attachment 67833 This schematic I found on this site http://www.neo-aerodynamic.com/GridTieInverter.html
    The writer PHI TRAN has also given the way this is working.
    Here are the photos View attachment 67834 View attachment 67835 View attachment 67836 View attachment 67837 View attachment 67838 View attachment 67839

    Please any comments as to how this works and has anyone tried this kind of circuit before?
     
  17. Fendel

    Fendel New Member

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    Hi Plodhi

    It seams me a realy fantastic grid tie inverter.
    I go to buy today the components.
    The secret seams me to be the capacitor in serie...
    So it is possible to feed 5VDC in 220VAC at every begining of the senoid.
     
  18. plodhi2002

    plodhi2002 New Member

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    Grid tie inverter

    Great! Lets see if it works on the 220V system having LINE->NEUTRAL like in many European and Asian countries. By the way did you browse that site there were other 'unconventional' type of circuits there too. :confused:
     
  19. blueroomelectronics

    blueroomelectronics Well-Known Member

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    Not sure how that schematic is supposed be a grid tie inverter.

    edit: nearly everything on that website is rubbish. Perhaps the clean your toilet rim project might work.
     
    Last edited: Oct 11, 2012
  20. Fendel

    Fendel New Member

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    Yes, they are many other schematics and projects at that site.
    Realy much of the things are not realistic and much optimistic, but not at all.
    I believe that the schematics to connect a assyncronous motor as a generator with low RPM has also a chance to run, and if some clean head substitute the doble relays with triacs, resistors, capacitors and scrs, that circuit may be also a great project.

    To the GTI, I think it is good to ad a simple diode in the DC line, and perhaps more litle and simple things.
    The basic idea is very brilliant, simple, great, like to put a disc to make a wheel... and than put the rubber...
    A 1 kW GTI realy has not to be senoidal. The arguments from the knowing anything spetialists, are all to much fool.
     
  21. -nikos-

    -nikos- New Member

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    I made ​​this and it works perfectly,,

    Converts sine grid wave to pwm and copied in symfon-phase

    you can add as many mosfet as you want to upload watts choosing the RIGHT transformer always


    View attachment 67920 View attachment 67921
     

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