Writing a comment as a good video would seem to be easy but the main point what I would like to mention here is, most of the people who have seen the video would have just scrolled over till the end and would have rated you. I appreciate that you have publicly uploaded a video about the grid interconnection with the inverter but since you are sharing it in a public interface it would be much better with the audio explanation. Here and there, there may be doubts arising as to why was this done. So with the audio explanation included we could get as to why something is done. I would, therefore, request you to upload the same video again but with audio explanation included. Thank you
That's a great job ! Thank you for that ! But is it possible to perform the same simulation with a Low Switching Frequency ? use of lookup table for switching states for example ? Or storage of switching angles in a lookup table for controlling a grid-tied multilevel inverter ? Thank you !
Merhaba hocam modeli yaptım gayet iyi anladım. En son takıldığım kısım phase shift değerini değiştirdikçe inverter akımı değişiyor. Bunun nedeni ni izah edebilirmisiniz? Selamlar
sir, in this video, when inverter is connected to grid, inverter current is increased. grid current is also increase. but load current is same. the video of single phase grid tied , you uploaded, was clearly explained that load current was shared by grid and inverter. here this was not clear and it seems to me that inverter takes current from the grid. what would be the suggestion from your side? thanks
Thank you very much for this video. It was really very much useful. Sir, can we use this inverter for charging and discharging battery energy storage system? What modification is needed for this sir?
Can you explain how/why did you choose these values (fs=99*...) (Ts_power=1/(100*fs) ) , ( RL=1.5e-3 * ...) , (L=0.15 * ....) , ( Qc=0.1 *...) , (Pc=Qc/50) ? Thank you
Hi, I'm a student, I want to learn how to simulate a three-phase inverter matlap like in the video you presented, I want to ask you to explain more about the sine wave display table for each scope; scope 1; Power; scope 2; scope 3; scope 4 show for what? What are each of the sine wave display table measuring for? Thank you so much.
Thank you for the clear instructions. Sir can you help in building non ideal grid ,how to generate distorted voltages & unbalanced loading in the grid?
+Maliha Shah, I don’t know how to build non ideal grid in matlab. You can added unbalanced load using matlab tool. But you should write load data matrix which changing with time to adjustable load.
Thank you sir for an amazing video in grid connected inverter. I wanted to connect solar pv to the grid through inverter but all the three phase voltages are always constant. With out solar pv it is also constant . can you help me regarding this problem please.
sir, i have designed a simulink model of MMC for capacitor voltage balancing . when i connect it to the grid as you uploaded, before connecting it works as natural multilevel converter, load current was same but after connecting it to grid, converter takes huge current from the grid. what may be the possible causes for that? thanks in advance.
hey abul munjer!I am also working on control system design of modular multilevel converters i need someones help,meanwhile i saw ur comment.can u guide and help me in my work ??
Its may be caused from sycnhronisation. You should connect after something. You should check the phase sycnhronisation, phase number, voltage and frequency equality.
Hi, the PWM Generator uses a carrier signal to generate PWM signals. Because of this, the input side should be an analog signal. As in the video, I used three-phase reference signals. So, the method is SPWM.
hocam iyi çalışmalar, elinize sağlık. yaptığınız her şeyi yapmama rağmen program error vermekte. neden böyle oluyor acaba errorları bir yazsam bakabilir miyiz?
At 5:35, you use 'From' block and name it ref! Could you please mention where is this ref coming from? I get an error when I execute the PLL block. I am using MATLAB 2018a version...
Ref is the modultion signals, that include three phase signals. The ref is connected to pwm generation for control the inverter voltage and current depending on phase angle and modulation index. What is the PLL error explanation? Did you write sampling time to PLL block? Could you check it?
Firstly, Thank You for this extremely useful video tutorial. For filter inductance, Vbase^2/P = Zbase, not Pbase, because Z = V^2/P. Also, would you please present a simulation where a PV module is providing a constant DC voltage to the inverter using a DC-DC Boost converter.
And what is the effect of the grid connection I mean what does It allow because we see only some loads but we don't see the inverter sending energy to the grid
PLL is the phase angle of the input signal. If you check the model, reference sine is generated by using the phase angle (as rad). The inverter output can be sync to grid by using this.
hello!! sir i need come help regarding current control of three phase vsc .i Have simulated the model but it has certain problems .can you check my model and point out me where i am wrong? I shall be greatful for ur response !!
You can calculate efficiency with input and output power. You can use mean value of input current and voltage. If you ask dynamic response, its mainly depend on control theory.
Generally, dynamic response is tested with step change analysis. Its not determined, because low response time is better for all inverters. For this reasen, too many researchers are working on decrease the response time.
Naki, Would like to ask you about the droop control response. Do you think droop response can be added to grid tied parameter? Is there any other way to add it to converter. Many thanks, Jean.
If you want to control active and reactive power transfer you should use a control method. For ex. If you using pi controller, you can control id and iq parameters. Thus, power transfer can be controlled in one loop. One parameter should adjust to phase angle and other parameter should adjust modulation index.
I explained the filter calculations in a video. I can't remember now, but if you check my inverter videos, you may find it. And also, you may find it in my paper: MPPT Based Model Predictive Control of Grid Connected Inverter for PV Systems
Control algorithm needed to achieve unity power factor. I just explain the power flow here with manually change the parameters. Please check my another video : Grid connected inverter for photovoltaic (PV) system ruclips.net/video/V8bps7KfHkw/видео.html
@@nakiguler Error in port widths or dimensions. Output port 1 of 'inverter/PLL/Model/Automatic Gain Control/Fundamental (PLL-Driven)/Freq' has 3 elements. This port does not accept the dimensions (or orientation) specified by the output signal. Error in port widths or dimensions. Input port 1 of 'inverter/PLL/Model/Automatic Gain Control/Fundamental (PLL-Driven)/Mean (Variable Frequency)2' is a one dimensional vector with 1 elements. hocam bu hataları veriyor sunumunuzda anlattığınız gibi adım adım yaptım ama :(
@@gamerdemir8365 Vabc_grid isimli from bloğunun parametresinin doğru olduğundan emin olmalıyız. Measurement bloğunun içerisinden, öncelikle onu kontrol edebilir misin? bir de PLL (3ph) olan bloğu kullandığından emin olmalıyız. Hata giriş, subsystem hesaplamaları ve çıkış arasındaki veri sayısının doğru olmadığını söylüyor. Bu durumda ya 3 faz gerilimler gelmiyordur ya da yanlış bloktan kaynaklı hata alıyor olmalısın.
Hi guyz, anyone who can help me with is notification I'm getting when I click run button?, I have done this design as it is in this video. please help me . (Component: Stateflow | Category: General error The current directory 'c:\program files\matlab 2016a\bin' is reserved for MATLAB files. Please change your current directory to a writeable directory outside of the MATLAB installation area.)
Writing a comment as a good video would seem to be easy but the main point what I would like to mention here is, most of the people who have seen the video would have just scrolled over till the end and would have rated you. I appreciate that you have publicly uploaded a video about the grid interconnection with the inverter but since you are sharing it in a public interface it would be much better with the audio explanation. Here and there, there may be doubts arising as to why was this done. So with the audio explanation included we could get as to why something is done. I would, therefore, request you to upload the same video again but with audio explanation included. Thank you
Awesome video tutorial ! Thank you so much !
I am glad to hear such a comment.
Thanks a lot... Very very helpful
That's a great job ! Thank you for that ! But is it possible to perform the same simulation with a Low Switching Frequency ? use of lookup table for switching states for example ? Or storage of switching angles in a lookup table for controlling a grid-tied multilevel inverter ? Thank you !
Thank you sir for this video. may god bless you.
Normally i don't comment .. but this is a master piece..Take a bow sir.. Can we have direct contact with you? Your number or email id?
Thanks a ton!!
Merhaba hocam modeli yaptım gayet iyi anladım. En son takıldığım kısım phase shift değerini değiştirdikçe inverter akımı değişiyor. Bunun nedeni ni izah edebilirmisiniz?
Selamlar
sir,
in this video, when inverter is connected to grid, inverter current is increased. grid current is also increase. but load current is same. the video of single phase grid tied , you uploaded, was clearly explained that load current was shared by grid and inverter. here this was not clear and it seems to me that inverter takes current from the grid.
what would be the suggestion from your side?
thanks
Thank you very much for this video. It was really very much useful. Sir, can we use this inverter for charging and discharging battery energy storage system? What modification is needed for this sir?
Thanks. You should research bi-directional structures.
Can you explain how/why did you choose these values (fs=99*...) (Ts_power=1/(100*fs) ) , ( RL=1.5e-3 * ...) , (L=0.15 * ....) , ( Qc=0.1 *...) , (Pc=Qc/50) ? Thank you
Hi, I'm a student, I want to learn how to simulate a three-phase inverter matlap like in the video you presented, I want to ask you to explain more about the sine wave display table for each scope; scope 1; Power; scope 2; scope 3; scope 4 show for what? What are each of the sine wave display table measuring for? Thank you so much.
Thank you for the clear instructions. Sir can you help in building non ideal grid ,how to generate distorted voltages & unbalanced loading in the grid?
+Maliha Shah, I don’t know how to build non ideal grid in matlab. You can added unbalanced load using matlab tool. But you should write load data matrix which changing with time to adjustable load.
thankyou .i will try. can you tell how to select switching frequency for 3 level mosfet inverter?
Thank you sir for an amazing video in grid connected inverter. I wanted to connect solar pv to the grid through inverter but all the three phase voltages are always constant. With out solar pv it is also constant . can you help me regarding this problem please.
sir,
i have designed a simulink model of MMC for capacitor voltage balancing . when i connect it to the grid as you uploaded, before connecting it works as natural multilevel converter, load current was same but after connecting it to grid, converter takes huge current from the grid. what may be the possible causes for that? thanks in advance.
hey abul munjer!I am also working on control system design of modular multilevel converters i need someones help,meanwhile i saw ur comment.can u guide and help me in my work ??
Its may be caused from sycnhronisation. You should connect after something. You should check the phase sycnhronisation, phase number, voltage and frequency equality.
Hi
I like this simulation.
What form of modulation do we classify this as?
Is it PWM or SPWM?
Hi, the PWM Generator uses a carrier signal to generate PWM signals. Because of this, the input side should be an analog signal. As in the video, I used three-phase reference signals. So, the method is SPWM.
hocam iyi çalışmalar, elinize sağlık. yaptığınız her şeyi yapmama rağmen program error vermekte. neden böyle oluyor acaba errorları bir yazsam bakabilir miyiz?
Hello sir, sir what is function of that block (scope4) means what we get from there?
At 5:35, you use 'From' block and name it ref! Could you please mention where is this ref coming from? I get an error when I execute the PLL block. I am using MATLAB 2018a version...
Ref is the modultion signals, that include three phase signals. The ref is connected to pwm generation for control the inverter voltage and current depending on phase angle and modulation index. What is the PLL error explanation? Did you write sampling time to PLL block? Could you check it?
Firstly, Thank You for this extremely useful video tutorial.
For filter inductance, Vbase^2/P = Zbase, not Pbase, because Z = V^2/P.
Also, would you please present a simulation where a PV module is providing a constant DC voltage to the inverter using a DC-DC Boost converter.
Thank you. This equations taken from matlab examples. You can find in examples. I will upload solar and wind systems in next mounts.
what is ma in the matlab function
@@deeboy106 ma is modulation index.
Can this inverter be connected directly to hybrid system with wind, pv and battery source
Yes possible, but power flow and dc bus voltage should be controlled.
I'm working on a 3 phase Grid Tied PV inverter with energy storage system. The control is complicated. I'm having troubles with my SIMULINK model.
Is it possible to design a PV inverter (three phase) for Phasor simulation method?
Sorry, I am not using phasor method.
good video but I want to know to main objective of the simulation and also I didn't understand the use of parallel connection control and thank you
I used the breaker for demonstration to before and after effects of grid connection.
And what is the effect of the grid connection I mean what does It allow because we see only some loads but we don't see the inverter sending energy to the grid
thank you sir for this video,
how does the pll work so that the inverter can sync with the grid ??? please answer my question
PLL is the phase angle of the input signal. If you check the model, reference sine is generated by using the phase angle (as rad). The inverter output can be sync to grid by using this.
Good day sir.
how do you generate a fault into the grid i.e distorted voltages , unbalanced loading ?
Good day, you can find as a “fault” in simulink library. You can see some fault types.
Can you explain shift angle and why -30 is given
it would be great if you could do this also in xcos / scicos
Can you try P&O as Vref
hello sir how u have calculated gain 535 kindly guide also plz explain Pc=Qc/50 formula what it 50
Sorry, where is the 535? Pc is the consumed power on the capacitor bank. 50 is only a gain as 1/50. It depends on type of capacitor.
@@nakiguler You put 535 gain for the connection of the ref value to the scope
hello!! sir i need come help regarding current control of three phase vsc .i Have simulated the model but it has certain problems .can you check my model and point out me where i am wrong? I shall be greatful for ur response !!
Hello, I not check your model, but if you say the problem, I can help you.
thank u sir for the responce! kindly send me ur email ,where i can send u my model .
How do you measure the efficiency of the power inverter and its response time?
You can calculate efficiency with input and output power. You can use mean value of input current and voltage. If you ask dynamic response, its mainly depend on control theory.
@@nakiguler, in the case of your model. How would you determine the dynamic response? I do agree with you for the efficiency.
Generally, dynamic response is tested with step change analysis. Its not determined, because low response time is better for all inverters. For this reasen, too many researchers are working on decrease the response time.
Naki, Would like to ask you about the droop control response. Do you think droop response can be added to grid tied parameter? Is there any other way to add it to converter. Many thanks, Jean.
If you want to control active and reactive power transfer you should use a control method. For ex. If you using pi controller, you can control id and iq parameters. Thus, power transfer can be controlled in one loop. One parameter should adjust to phase angle and other parameter should adjust modulation index.
How can you inject more power to the system then.? what do you need to do ?
You may need to change the filter parameters.
@@nakiguler
So like if i want to have the active power at 150MW what values should i have for my filters ?
I explained the filter calculations in a video. I can't remember now, but if you check my inverter videos, you may find it. And also, you may find it in my paper: MPPT Based Model Predictive Control of Grid Connected Inverter for PV Systems
How do you achieve unity power factor?
Control algorithm needed to achieve unity power factor. I just explain the power flow here with manually change the parameters. Please check my another video : Grid connected inverter for photovoltaic (PV) system ruclips.net/video/V8bps7KfHkw/видео.html
what are parameters ma and shift. i understand shift is the shift angle, what of ma
ma is the modulation index.
Hocam merhaba pll için hata veriyor simülasyonu çalıştıramadım ben acaba neden olabilir
Merhaba, PLL bloğunun sampling time ve initial freq değerlerini girdin mi? Hata mesajını paylaşabilir misin?
@@nakiguler Error in port widths or dimensions. Output port 1 of 'inverter/PLL/Model/Automatic Gain Control/Fundamental (PLL-Driven)/Freq' has 3 elements. This port does not accept the dimensions (or orientation) specified by the output signal.
Error in port widths or dimensions. Input port 1 of 'inverter/PLL/Model/Automatic Gain Control/Fundamental (PLL-Driven)/Mean (Variable Frequency)2' is a one dimensional vector with 1 elements.
hocam bu hataları veriyor sunumunuzda anlattığınız gibi adım adım yaptım ama :(
@@nakiguler bana bu devreyi mail atabilir misiniz benim kullandığım matlab 2016 onda çalışır mı bilmiyorum tabi turgutdemirdogen@gmail.com
@@gamerdemir8365 Vabc_grid isimli from bloğunun parametresinin doğru olduğundan emin olmalıyız. Measurement bloğunun içerisinden, öncelikle onu kontrol edebilir misin? bir de PLL (3ph) olan bloğu kullandığından emin olmalıyız. Hata giriş, subsystem hesaplamaları ve çıkış arasındaki veri sayısının doğru olmadığını söylüyor. Bu durumda ya 3 faz gerilimler gelmiyordur ya da yanlış bloktan kaynaklı hata alıyor olmalısın.
@@nakiguler hocam teşekkür ederim pll (3 ph) değilmiş buraya kadar çalışıyor
teacher can u share the file.
Hi guyz, anyone who can help me with is notification I'm getting when I click run button?, I have done this design as it is in this video. please help me .
(Component: Stateflow | Category: General error
The current directory 'c:\program files\matlab
2016a\bin' is reserved for MATLAB files. Please change your current directory to a writeable directory outside of the MATLAB installation area.)
Hi, you should change the directory selection. Check the current folder on the main MATLAB screen. It should be different than reported.
@@nakiguler Thanks, now it is working properly.
hi , can you hilp me