Can i take a look what's inside that box before frequency scope? I have a pretty basic 1 phase simulation, i need to know how to convert Volt-time or watt-time into freq-time.
I am doing my Msc research in droop control in distributed integrated grid using renewable energy, but no idea what I should be doing. Can anyone help please?
Hi Vijay, actually it is shifted on x-axis after inverting it because of the (-phi) in -cos(2*omega*t - phi). So if you shift it back then you can see that it is inverted, let me know if it clarifies.
Hi, if you have any query then you can post it here. For anything else you can contact me through linkedIn. www.linkedin.com/in/suraj-kumar-72b395a2?lipi=urn%3Ali%3Apage%3Ad_flagship3_profile_view_base_contact_details%3BY%2FiyN37DSA6%2F%2FSER8aINxw%3D%3D
Nicely explained... would you please share a video showing comparison between droop control, hysteresis control and sliding mode control of an inverter in MATLAB simulation.
@mineshjoshi5411 Hi, I am glad that it helped you. Sorry Minesh, but I am not a control guy; I specialize in power systems. This was just a tangent from my primary work, so someone other than me is the right person for the topics you requested. Thanks 🙂
Hi Kamireddy, the graphs are useful in observing the Power tracked and time taken to reach the maximum power point by each method. If you zoom the graphs, you can also observe the ripples present in the power curve. Please feel free to ask any more questions or clarifications. Thanks!!
Thank you for sharing this video. i am running this simulation but could not get the frequency waveform. when i clicked on frequency oscilloscope, it is showing nothing. would you please guide accordingly
Hi, I didn't get your query. It would be helpful if you could upload a screenshot on my Quora account or message me on LinkedIn. Link to both is available on home page.
What a great explanation. When I was studying Transient Analysis in Power Grids the concept of grid inertia really answered lots of questions and helped me understand the whole power grid much better. This video should be shown in universities across the globe. I sent you a request on LinkedIn.
You are right. This concept is important for understanding a lot of concepts in the power system, for example, droop, stability, etc. When I felt that this concept is so important, I thought I should try to explain it, glad to know that the concept is delivered in a way I was expecting.
I really want to understand more. Can you do an example of how generators ramp load in parallel? Example would be like diesel gen against utility and ramping load on and off generator. Great video with Matlab but want so much more and math to backup simulation
Hi @Nonya Fletcher, thank you for the comment 🙂. I will try to post the suggested topic soon. Till then you can also check out the this video on power system inertia ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-1NRAw2yUj4w.html This is not directly related to what you ask but important to understand the droop.
@@ASeriousCircuit droop makes sense to me since the frequency can vary. I'm struggle to understand with utility parallel with generator since frequency and voltage are fixed because of strong utility source. How can generator assume more or less load in this case with those being fixed along with load value? An explanation would be appreciated!
Hi, @@nonyafletcher601 correct me if I am wrong "You are asking that a strong utility grid will maintain the frequency and voltage of the point of common coupling (PCC), then how a change in load at PCC deviates the frequency and voltage. And due to this, we need a DG to balance the power and maintain the frequency and voltage." If this is not your doubt then we can connect on LinkedIn to discuss this in detail. Send me a request here... www.linkedin.com/in/suraj-kumar-72b395a2/
EXCELLENT NO BULLSHIT EXPLANATION THANKYOU THATS WHAT SEPARATES A GOOD TEACHER FROM A HARD TO UNDERSTAND ONE THE GOOD ONES FIND A WAY TO GET THE MESSAGE THROUGH EVEN WITH A BRAIN LIKE MINE, LOL,THANKYOU FOR YOUR TIME VERY MUCH APPLAUDED
Hi I didn't get the question. The use of sample and hold circuit is similar in all application. It is just to hold the signal for a specified amount of time. I am not aware about any different use in fuzzy.
Yes, but you can also say it simpler. Both Capacitors and coils will save energy. But when you have AC curent, the current will not only save energy, but give away energy( Current ) . For example an electrical motor where you have no load. Then the cos(phi) is small. Lets say 0,05 or 0,1- This means that 5 or 10% of the total available energy is used to turn the rotor. The rest of the energy is going back to the net. If you turn up the load so the cos(phi) is 0,9 then 90% of the energy is used and only 10% is going back to the source/net. Reactive power is ping pong energy. Going both ways, because a coil will be charged and discharged.
Thanks for watching the video thoroughly and adding the point to the discussion. I also tried to explain the same statement, however, I felt that just stating this fact will not be enough as we (especially electrical engineers) are reading this statement since 1st year of our graduation but still have not thought about it in depth. So I intended to tell the same story with a bit of different perceptive and a flavor of mathematics. (About keeping it simple, I was not up for analogies for this concept because I don't feel analogies can do justice to reactive power)
You can understand it this way, the membership functions are not designed according to exact mathematical calculations so it is possible that sometimes the value generated by the combination of error and change in error does not generate the desired output. The required membership functions for error and change in error might be somewhat stretched or shrank versions of the membership function that we used and updating the membership function from within might be a time taking process. Simply speaking if you design a membership function and you are not getting desired output then instead of updating the membership function from inside just do some variation with the gain parameters and it will do the trick. It is very difficult to explain it over a comment. However, I hope It helped you doubt.
Hi although I used this thesis "Advanced Islanded-Mode Control of Microgrids" by MB Delghavi (2011) to model the system using d-q fame reference generation. But, this particular model in the video I built by myself in order to obtain a simple current control model. However, you can refer to the above thesis or any paper on grid integration using HPWM.
Sir what is the relationship between error and change in error, and how did you come to the conclusion when error value is NB and change in error value is PS the output should be PS ??
I don't understand what do mean by relationship between error and change in error. Error simply means (reference - desired output). Change in error = (Error at time t - Error at time t-1). Why have I taken output as PS (for NB and PS) these decision depend on the property of your system. The busk converter acts in a way that when error is NB and change in error is PS the control signal must be PS to decrease the error. Hope it gives you clarity
Generally, It is good practice to keep maximum range equal to 1 and scale the segments (PB, PS, Zero, NS, NB) accordingly. For example , if you have desired output Vout = 18 volt and when you output is from 17 volt to 19 volt you want to call it zero error, then in membership function keep you Zero function from -(1/18) to (1/18) because according to scaling 1 is at (18/18), and -1 is at -(18/18). This is just one way to do it you can scale according to your requirement .
Another great video! Can you explain what exactly is the gain that comes after the fuzzy controller does? I understand that it depends on the values of the circuit but what is the purpose of the gain? And is there a way to calculate it?
Thanks you.. I am glad that it helped you!!! You can understand it this way, the membership functions are not designed according to exact mathematical calculations so it is possible that sometimes the value generated by the combination of error and change in error does not generate the desired output. The required membership functions for error and change in error might be somewhat stretched or shrinked version of the membership function that we used and updating the membership function from within might be a time taking process. Simply speaking if you design a membership function and you are not getting desired output then instead of updating the membership function from inside just do some variation with the gain parameters and it will do the trick. It is very difficult to explain it over a comment. However I hope It helped you doubt.
Sorry for the sound quality... You can turn on subtitles for clarity. I recorded all videos of this series in one go and realized this problem at a later stage. Sorry for the inconvenience.
