Grid connected inverter for photovoltaic (PV) system

[@ProfessorDester]

Thank you very much. I've implemented your project in Simulink and it works fine. By the way, do you have some video about a single phase system?

[@HappySingh-gf3rr]

Nyc dude

[@asdahmed1955]

Thank you very much for sharing the simulation. Can I ask you to share how to do model predictive control of grid connected inverter? Thank you very much again

[@nakiguler]

Asd Ahmed, I am working on this subject. When I complete, I will send a paper about that.

[@Francies1004]

good job thanks ,but i have some question on PV system particularly how to get a phase lock loop or theta for synchronization

[@arslanahmed7229]

Great work. Could you please give me the link of research paper you are using regarding this simulation

[@arashjuly3822]

thanks for video it was really helpful ,i wanted to ask you why you did not use the freq output of PLL directly and make the references with this formula sin(2*pi*f),sin(2*pi*f + 2*pi/3),sin(2*pi*f - 3*pi/2) and i wanted to know why you multiply by modulation index? and what is phase shift angle? where did you calculate it?

[@nakiguler]

Hello, I didn't use the freq output, because the grid has a fixed frequency. Because of calculation times, unstable situations may occur. The modulation index changes the inverter output voltage for island mode. When the inverter is connected to grid, modulation index and phase angle change the active and reactive powers. I didn't calculate it, these are generated by PI controller.

[@arashjuly3822]

@@nakiguler thank you very much just one thing Qrefrence that you calculated should not be Q=P*tang(phi) ? here you choose it as Q=P*sin(phi)

[@aliahmed254]

Hello, What is the method for control of inverter? Is it current control method? PI Controller takes P & Q as input and generates 'ma' and shift.

[@takieddinedrai6228]

hi , sir thank you very much for these helpful videos about PV systems, i just want to know how did you calculate Qref, and if there are any papers about this type of control could you send it to me if it is possible. thank you again

[@nakiguler]

Hi, P=V*I*cos(theta) Q=V*I*sin(theta) I want to generate a reference reactive power in kVAR. To do this, I need a theta. I know cos(theta)=0.99 so power factor. acos(0.99)=theta Qref=Pref*sin(theta) ==> Qref=Pref*sin(cos(0.99)) I suppose, the Pref may be Sref. But, the system around unity power factor. Please check. Is there any problem?

[@takieddinedrai6228]

@@nakiguler thank you sir, I understand that, what about the PI controller how can i calculate the parameters Kp and Ki is there any formula ??

[@nakiguler]

Takieddine Drai, you may use the Ziegler Nichols method to tune the parameters. And also, you can select a small Kp and increase step by step. You can find the optimal one.

[@takieddinedrai6228]

@@nakiguler thank you

[@王继超-b9d]

@@nakiguler Thanks for your reply, i get it,and I am learning model predictive control, hope to get your guidance.

[@susantaminz9873]

Hi, Thank you so much for the simulation, can you provide me the paper name or material used for the controlling strategy of grid synchronization. And if time permits can you tell how to incorporate MPPT algorithm in this model.

[@thanhlephuong7687]

Many thanks for PV Simulation

[@dayaseen8873]

Thank you for all the videos.

[@nakiguler]

Thanks for your interest 🙂

[@ghizlenecheikh7006]

hello, firstly thank you for this video , i have qst about the strategy between the pv and grid ,is there a compensation between them or not ? i mean that when the load need a more energy , it takes from pv and grid ? i wish that you answer me..thank you have a nice day

[@abdelbassetnid5341]

Thanks so much for sharing this video

[@nakiguler]

🙂

[@ElioSanchezG]

It works amazingly!!! Thank your very much for this helpful video!!!

[@nakiguler]

😊👍

[@ElioSanchezG]

@Pomy Thomas I implemented all the files

[@alihayajneh133]

Can you please send to me matlab file..

[@afnankazanci6123]

Elğine sağlık hocam çok iyi șeyler bașıryoursun,, yeni tasırma bașlayın bi muhendis olrak PV sistemin prformansına etkleyen doğrusal olmayan yükleri okumak istiyorsam, bu vidyou uyguyabilir miyim?

[@nakiguler]

İlginiz için teşekkür ederim. Bu videodaki sistemi kurup nonlinear bir yük olarak doğrultucu bağlanabilirsin. Analiz etmek istediğin durumları bilmiyorum ama kendine göre senaryolar (gerçekçi) oluşturarak incelemeler yapabilirsin diye düşünüyorum. Yardım edebileceğim bir şey olursa mail atabilirsiniz. İyi çalışmalar ve başarılar dilerim.

[@soumyaranjannath1004]

I have a doubt.. In the calculation of Q_ref, I rhink Q=P*tan(phi) and not P*sin(phi) as you have done. Please correct me if I am wrong. Thank you.

[@yasirsabah1581]

Great 👍🏼 , thank you very much Just i have to know about equations you have used to generate ref value of pwm, is there any reference related to these equations?

[@nakiguler]

These equations are used to sine wave generation. I only add phase shifts. I don't know any reference about it. But it is general thing. If you need help, please let me know.

[@yasirsabah1581]

Naki GÜLER thank you so much for your reply, now iam working on single phase dual active bridge dc dc converter in simulink can you help me to make the whole system design? Is there any other way to contact with you? if it is possible.

[@nakiguler]

Yasir, I didn't work on DABs. If you need you may contact me on Researchgate. www.researchgate.net/profile/Naki_Gueler2

[@thanhlephuong7687]

I followed as you show but the P~-6xx Q~-19xx, could you guide me where is wrong?

[@gianfrancodilorenzo9438]

did you try to start the simulation with a Pref of 20 kW? I had some problems starting with this value

[@nakiguler]

I didn't try it. But it might be a problem, because time may be needed to start the PV model.

[@mr.topspeed7238]

Hello, urban scholar. Do you have any smart homework energy management system matlab simulation ?

[@funnybabywithindiandialogu7421]

Thank you for your video, in 20.44 the parameter You’ve given, for cfmax and Lf,Rlf, which formula you’ve used? Regards sir...

[@nakiguler]

Could you please check the below paper. I gave the equations for filter design. MPPT Based Model Predictive Control of Grid Connected Inverter for PV Systems

[@sahilmehta2324]

Hello sir, *How can I convert the system into a 415V system (380V in the present system) and what exactly are the blocks I need to make the change. I have already tried, but the system limits its output at 380V. *Why are we taking 780-800V as DC input for 380V AC

[@abdanhd9180]

I already follow your design step by step but my Vabc doesn't have the same value as yours. Any thoughts?

[@nakiguler]

Check the filter parameters and sampling time.

[@Saykwabena]

Thanks a lot...Can we have a video on wind turbine - PMSG MPPT?

[@nakiguler]

Hi, I can't find a PMSG model with all the system parameters. The wind model requires measured parameters in pu. I can't find a solution for the torque side.

[@ghizlenecheikh7006]

Hello sur can you reply me because I need your help ,this simulation can I do it but with grid tie inverter ,how I make it ?/please help me

[@shakeebmohammed5711]

hi can you tell me how to do Genetic Algorithm-Based on MPPT for OFF-Grid Photovoltaic Solar System. which will help me a lot thank you in advance.

[@anuj6386]

why you didnt put mppt algorithm?

[@simoesfsa]

Great work! Thank you very much. It's working perfectly

[@arundhutihaldar7480]

Somehow its not working for me.. I am not getting the sin nature of the output Can you help me in any manner?

[@nakiguler]

did you take care of the problem?

[@nakiguler]

I am happy to hear this :)

[@arundhutihaldar7480]

@@nakiguler yes sir, I did. Thank you so much for the tutorial.

[@nakiguler]

Ok, good 🙂

[@nasserrhamar3788]

Hello sir.. Please can you help me.. I run all the simulation as you did.. But when i change the irradiation power go negative

[@ckkishorekumar]

I am getting this error sir. please help Simulink cannot solve the algebraic loop containing 'grid_pv/Power (3ph, Instantaneous)/Sum4' at time 0.020002500000000003 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues. To rule out solver convergence as the cause of this error, either a) switch to LineSearch-based algorithm using set_param('grid_pv','AlgebraicLoopSolver','LineSearch') b) reducing the ode45 solver RelTol parameter so that the solver takes smaller time steps. If the error persists in spite of the above changes, then the model is likely ill-defined and requires modification.

[@nakiguler]

Did you uncheck the tick at 1:42

[@amirhosein271]

hi sir i closed the breaker and start the test but output v and i had some Oscillation , why this happen??

[@vandersoncosta3200]

Dear Naki Güler, thank you for share this knowledge with us. I did not understand why you used "sin" instead of "tan" to calculate the Qref. Could you explain? PS: I learned a lot from the papers you published, thank you!!

[@nakiguler]

I am glad to hear that. Because I used a power factor reference (0.99), I calculated the reactive power in kVAR by this way. I am not sure about tan usage here.

[@emirkaantutus3629]

hocam iyi çalışmalar. emeğinize sağlık. videoda yaptığınız her şeyi yaptım ancak run ettiğimde Tss, Cfmax, RLf, Lf gibi değerler için (Örneğin: Error evaluating parameter... Caused by: Undefined function or variable 'Cf'.) hata alıyorum. Kodu da save edip çalıştırdım, simulinkle aynı dosyaya kaydettim ancak olmadı bir türlü. Yardımcı olabilir misiniz?

[@osmantas2313]

hocam merhaba videonuzdaki sistemi yaptım matlab simulinkte ama çıkışta 2 civarında bir akım veriyor bazen 1-2 arası bazen 3ün biraz üstünde veriyor ışınımı arttırsamda 3ün biraz üstünden öteye gitmiyor bu durumda 10 W falan bi güç anca çıkıyor neyi yanlış yapmış olabilirim acaba akım sadece 2 değer veriyor başka değer vermiyor gibi yardımınızı bekliyorum iyi günler

[@HSharadga]

Hello! What is the modification would be in case the PV cell is connected in the same time to load? Thanks

[@nakiguler]

Hello, you can add a load before grid connection point.

[@harryleecap1033]

Sorry. but where is the Igrid signal?

[@arundhutihaldar7480]

Sir, I am getting an error if I run the model. An error occurred while running the simulation and the simulation was terminated Simulink cannot solve the algebraic loop containing 'PV_INVERTER/Universal Bridge/Model/Tail' at time 0.0 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues. To rule out solver convergence as the cause of this error, either a) switch to LineSearch-based algorithm using set_param('PV_INVERTER','AlgebraicLoopSolver','LineSearch') b) reducing the VariableStepDiscrete solver RelTol parameter so that the solver takes smaller time steps. If the error persists in spite of the above changes, then the model is likely ill-defined and requires modification. How to solve this?

[@mohammeda3312]

hello, my Iabc is way higher than you, it reach arnd 200. also the THD is higher like it reach to 30 what could be the issue? i doubled and trippled check everything step by step in your video but always same i get wrong waveform .

[@Estracek]

Hello sir, in one of your tabs says "qzs_param", can you explain how to calculate these parameters. On the other hand, can you explain vaguely the DC voltage control in the case of a single phase voltage source inverter connected to the grid for PV applications? I ask because I need to connect a qZS DC / DC converter with variable DC voltage at the output due to changes in radiation. That is why I need to control the DC voltage input to the VSI. The scheme I am studying is PV - qZS - H bridge - transformer - diode bridge rectifier - VSI - network. Thanks in advance.

[@nakiguler]

Hello, ”qzs_param” not a parameter calculation file. It's only parameter file that contains sampling time, input voltage and switching frequency. But I think you can find a paper about parameter calculation. Please look Haithem Abu-Rub’s papers. Voltage control of the QZS inverters is different than classic types. Because it controlling by depending on shoot-true times. I have a paper about voltage control of QZS. Paper: ”Multi-Input Multi-Output Based Sliding-Mode Controller for Single-Phase Quasi-Z-Source Inverters”

[@Estracek]

@@nakiguler I get it. The problem is that I have a variable DC voltage at the output of the DC / DC converter (qZS with MPPT algorithm) due to radiation changes. Then, I must connect this system to the network through a VSI keeping constant the input voltage on it (which in turn is the output voltage of the DC / DC converter). Thanks for you reply.

[@nakiguler]

Is this an academic project or thesis? MSc or Ph.D.? I want to suggest somethings but it may change depending on your aim.

[@Estracek]

Yes, it is for my thesis project.

[@nakiguler]

In my opinion, you can set the system by using only qzs inverter. Why you want to use dc/dc converter and VSI?

[@dhruvbhatia8377]

Sir , I'm not able to control Q at the inverter side . For Pref=10kw I'm getting the actual Q as -41kvar and even after changing Pref I'm getting the same current .

[@nakiguler]

Please check the Q variables step by step. And be sure the PI outputs are correctly connected to the function block.

[@reaperxd123]

Hey man. I got the same problem, did you ever figure out how to fix it ? Edit: Nwm figured it out p and q error were switched

[@MdMasudRana-ej6bk]

Is it possible to design a PV inverter (three phase) for Phasor simulation method?

[@nakiguler]

Sorry, I am not using phasor method.

[@hocho7254]

Today I tried it but I am not getting similar waveform as you are getting and THD is high like 26, 28, 25 ........could please tell what could be the the problem?

[@nakiguler]

Please check, sampling time and filter parameters. And also, switching frequency.

[@kaziahad8960]

I am facing these error' "The sample time 2.5e-06 of 'pvgrid/MATLAB Function/ SFunction ' at input port 2 is different from the sample time 0.00025 of 'pvgrid/Discrete PID Controller/Saturate' at output port 1. Consider inserting a Rate Transition block between the two ports. Alternatively, you can control the diagnostic action for unspecified rate transitions by changing the option "Multitask (or Single task) rate transition" on the Sample Time Diagnostics pane of the Configuration Parameters dialog box."'Can you solve this.

[@nakiguler]

Please remove the tick follow: Configuration Parameters - Solver - Tasking and sample time options - Treat each discrete rate as a separate task.

[@enesbektas3975]

Sayın hocam, burada P ve Q nun rms değerini gözlemlememiz gerekiyor diye biliyorum.Doğru mudur, Kontrol de anlık değerlere göre kontrol yapılıyor. Ancak Sonuçta P ve Q nun RMS değerine bakmak gerekiyor diye biliyorum. Q yu blok ile hesaplar iken P*tan(alfa) olmayacakmı hocam, sin ile çarpmışsınız orada bir problem olabilir. Emeğiniz için teşekkür ederim. Çok yardımcı oluyor vidyolarınız. Saygılarımla

[@nakiguler]

Merhaba videoların size yardımcı olmasına sevindim. Dediğin gibi P ve Q değerleri RMS ile hesaplanabilir. Ancak RMS işlemi zaman alan bir yöntemdir ve pek tercih edilmez. P ve Q'yu hesaplattığım bloğa bakarsan "instantaneous". Ayrıca, P ve Q dan gelen değerlere bakarsan sinüs formunda değil doğru düzlemde olduğunu görebilirsin. Burada "instantaneous power theory" incelemeni tavsiye ederim. Bu önemli bir yöntemdir. Q için bahsettiğin durum ise sanırım Q_ref hesaplamayı söylüyorsun. Orada sadece referans reaktif güç değerini kVAR cinsinden hesaplamak için acos*sin kullandım. 0.99 power factor, yani cos(fi). Burada bana fi lazım dedim acos ile onu buldum. Sonrada Pref*sin(fi) dedim, bu da Q_ref. Bence bir problem yok ama yine sen de bir kontrol et istersen. Ona göre tekrar bakabiliriz. Kolay gelsin.

[@devrajsen527]

If i add a boost converter what are the values for the capacitor , inductor,diode,IGBT i need to give..can you please help me with that.

[@nakiguler]

You may check design a boost converter video: kzbin.info/www/bejne/iXvMoWqZerh4mck

[@devrajsen527]

Thank you so much!I did design the model the way you showed in this video..and it's properly running but for my hardware..i also need to add a boost converter inbetween the PV array and Inverter..showing the changes in harmonics.I will check your boost converter video..if i do need any help..can i get your mail id..if it's okay with you! Thank you so much for your time!

[@nakiguler]

You may contact me on Researchgate. www.researchgate.net/profile/Naki_Gueler2

[@salonimishra9618]

Thanks for sharing . But when i designed this model following errors are occurred while running the simulation 1. output port 1 of 'untitled/PLL' is not connected. 2.Matching "From" for "Goto" untitled/Three-Phase V-I Measurement1/Iabc' not found 3.Error in port widths or dimensions. Output port 1 of 'untitled/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. could you please solve my problem ASAP. Thanks again

[@nakiguler]

Hello, did you check this: are you using 3 Phase PLL?

[@salonimishra9618]

you are right ..... i did the same mistake . now correct it but get error again. I will mail you the details. Thanks

[@nakiguler]

Ok

[@arjunbaliyan546]

Is your problem resolved I am also getting the same error?

[@nalinikarchi9350]

(3ph)/Model/Variable Frequency Mean value/Model/Discrete Variable Time Delay/S-Function: Negative/NaN time delay is not allowed. Delay has been set to zero. I am getting this problem. simulation is stoppeded

[@nambirajanr6133]

Sir I am getting output voltage at near 310 And current is also around 380

[@nambirajanr6133]

Plz help me

[@gudipatimaheswari6855]

Sir Pls give me link of published paper... Iam searching ..but I am not found...i want to take reference Pls sir...

[@nakiguler]

Hi, you may use one of my paper: MPPT Based Model Predictive Control of Grid Connected Inverter for PV Systems ieeexplore.ieee.org/document/8997105 Also, you may find all of my papers in the below link: avesis.gazi.edu.tr/gulern/yayinlar

[@aman6937]

Sir I;m getting this error please can you help?? Simulink cannot solve the algebraic loop containing 'Pv_grid/Power (3ph, Instantaneous)1/Sum1' at time 0.0014025 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues.

[@nakiguler]

Hi, did you fix the problem?

[@padhuvintocorleone]

I am also getting the same error. Can you please help me with this.

[@manashmishra7781]

Thanks a lot sir for this videos.I want to implement this model on experimental prototype of 1.5 kW for grid voltages of 110 rms voltage can you help me to chose the parameter of the PV system and filter elements

[@nakiguler]

I explained parameter selection in videos. Could you please check?

[@muhammadilyas9896]

@@nakiguler sir please tell me how i get matlab function.

[@nakiguler]

muhammad Ilyas, if you type ”function” to Simulink library it will be shown.

[@nakiguler]

muhammad Ilyas, And also you may check my previous videos. I got it from library in previous videos.

[@muhammadilyas9896]

@@nakiguler oka..thank u sir.. Sir i have chosen FYP research based..base paper title Dynamic energy Management for photovoltaic power system including hybrid energy storage in smart grid application. I have no idea how i implement this.. Can you guid me sir.?

[@qadirbuxmemon4398]

Sir do you have paper on this simulation?

[@kolawoleoluwatosin8077]

Thank you for all the videos, you are sharing, it really help so much, can I have your email.

[@nakiguler]

You may find my email here: www.websitem.gazi.edu.tr/site/gulern/posts/view/id/139133 or Researchgate.

[@khaledsaidi4831]

I don't understand how you generate signals of refernce from ma ans shift

[@arjunbaliyan546]

2. Output port 1 of 'solararray/PLL (3ph)' is not connected. I am facing these errors can you please resolve this???

[@badatyadeepakbalkrushna5537]

Connect a terminator to it.

[@anuj6386]

can you tell the reference paper

[@RahulKumar-rj1mm]

thank you very much sir for this video . i'm trying to simulate a single phase grid tie inverter. my inverter voltage is continuously rising . i can't under stand why this is happening. can you please provide your email id so that you can have a look over my model. it will be a great pleasure for me if you help me sir. please reply

[@zorluserkut5005]

HVDC ile olanini yapabilirmisiniz?

[@nakiguler]

HVDC sistem kurmak başlı başına karmaşık bir yapı oluşturacaktır. Hat vb. durumları da katmak gerekir. Hem HVDC tasarımı hem de PV entegrasyonunu açıklamak bir makale olur diyebilirim :) Videoda anlatmak gerçekten zor olur.

[@dogukanyaman7904]

PLL(3ph) freq. bağlanmadığı için hata veriyor.Sizinki nasıl çalışıyor anlamadım

[@nakiguler]

Bende 3ph PLL kullandım(8:05), yoksa hata verir.

[@dogukanyaman7904]

@@nakiguler evet ama frequency kısmı bağlı değil

[@nakiguler]

@@dogukanyaman7904, anladım. şimdiye kadar onu hiç kullanmadım sanırım. bağlantıda yapmıyorum ama bende hiç hata vermedi. Bilmiyorum, sürüm farkı yada configürasyon ayarlarındaki farklılıklar neden olabilir.

[@dogukanyaman7904]

@@nakiguler herhangi bir çözüm öneriniz var mı?

[@nakiguler]

@@dogukanyaman7904 simülasyon fixed-step discrete mi kontrol edebilir misiniz? hata metni varsa onu gönderirseniz onun üzerinden de gidebiliriz. Bu arada şunu da belirtmek isterim, MATLAB bazen başka hatalar olduğunda eksik bağlı yerlere yönlendirme yapabiliyor.

[@arjunbaliyan546]

1. Matching "From" for "Goto" 'solararray/Three-Phase V-I Measurement1/Iabc' not found

[@nakiguler]

Did you check voltage measurement labels?

[@arjunbaliyan546]

@@nakiguler Yes checked what changes are required??

[@nakiguler]

Label usage should be selected or you should refer to Iabc with goto block.

[@ehsankhajehamiri8210]

Naki GÜLER how sir ?

[@ArifHussain-fs5jz]

Same issue was with me, the error is you used wrong PLL please select PLL(3ph)

[@sayakmondal7526]

Can I get the matlab function file?

[@bindunaidu936]

can u pls provide any reference paper regarding this model asap.

[@nakiguler]

I have two paper that related with grid connected inverters, you can find it in my official web site (websitem.gazi.edu.tr/site/gulern/academic) : 1. Guler Naki, Irmak Erdal (2019). Design and Control of Multi - Input Multi - Output DC-DC Converter for Neutral Point Clamped Inverters. Gazi University Journal of Science Part:C, 7(49-62). 2. Erdal Irmak, Naki Güler, 2018. Model Predictive Control of Grid-Tied Three Level Neutral Point Clamped Inverter Integrated with a Double Layer Multi-Input Single-Output DC/DC Converter, IEEE 12th International Conference on Compatibility, Power Electronics and Power Engineering~IEEE CPE-POWERENG'2018, Doha, Qatar, 10-12 April 2018.

[@zeeshangla]

@@nakiguler the first one is not there

[@fateme.rouhi.8634]

It,s not working perfectly Why?

[@fateme.rouhi.8634]

The current and voltage have 180 degree shift difference Do you know why? Thanks for helping.🙏

[@bhavikbrahmbhatt8057]

Can I get this simulation ??

[@nakiguler]

I am sorry, I am not sharing the simulation files.

[@anujvarshney9599]

An error occurred while running the simulation and the simulation was terminated Caused by: Simulink cannot solve the algebraic loop containing 'PV_Grid_2/PV Array/Diode Rsh/Product5' at time 0.17930000000000001 using the LineSearch-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues. To rule out solver convergence as the cause of this error, either a) switch to TrustRegion-based algorithm using set_param('PV_Grid_2','AlgebraicLoopSolver','TrustRegion') b) reducing the fixed step size. If the error persists in spite of the above changes, then the model is likely ill-defined and requires modification.

[@nakiguler]

Did you select “break.....” at 1.45 second?

[@anujvarshney9599]

@@nakiguler tried setting breaker time to 1.45 seconds...still it is responding in the same way as above

[@bhavanimunipally4647]

Sir iam getting an error like PLL output port f is open

[@nakiguler]

You may try to connect a terminator.

[@arjunbaliyan546]

Sir can you please share your email id??? So that i can mail you the model....

[@sannikumar7840]

hallo sir i am getting some error pls help

[@nakiguler]

what is the error? please type here.

[@sannikumar7840]

@@nakiguler Simulink cannot solve the algebraic loop containing 'MPPT_control_of_grid_connected_PV_invertor/PV Array/Diode Rsh/Product5' at time 1.31783 using the TrustRegion-based algorithm due to one of the following reasons: the model is ill-defined i.e., the system equations do not have a solution; or the nonlinear equation solver failed to converge due to numerical issues.

[@nakiguler]

sanni kumar did you tick the checkbox at 1:49

[@sannikumar7840]

@@nakiguler thanks you sir

[@刘一鸣-q1e]

Please share

[@잔시스-u4g]

What are the parameters

[@nakiguler]

Which parameters? Please check 20:40.

[@잔시스-u4g]

@@nakiguler saw it. thanks

[@잔시스-u4g]

@@nakiguler btw sir how can i see the graph for THD. And can i add filter to reduce it?

[@nakiguler]

@@잔시스-u4g , you can use 2 ways for THD. If you want to see results for all simulation time, you can use THD block in simulink library. You can enter three phase signal to that. It will give the THD results when the simulation is running. Second way, if you want to analyze specified period or periods, you can use FTT Analysis in Powergui block. To obtain better signals, You can increase the filter inductance. But it will increase the losses. Efficiency will reduce.

[@잔시스-u4g]

@@nakiguler thank you so much sir

[@fethikhelifi1766]

Hi , Can you give me the file

[@nakiguler]

You may do it, I explained all the steps.

[@fethikhelifi1766]

@@nakiguler I want to simulate the PV array for a variable profile of irradiation and temperature