Let's say we have small hydropower plant which can operate in on-grid and in islanded mode too.
I understand a principles of frequency and active power control in a case we have synchronous generator, but what would be diff in a case of Asynchronous generator? How do we controll frequency in a...
I found that terms isochronous and droop speed control are closely related to this topic. I've just read some free ebooks. Would be good if someone of you would explain main differences isochronous and droop mode.
Also one more questions. What would be huge load change? For example if my...
Just let you know, my simulation is going good. I'm really not sure should I ask this in a new topic but I will let the administrators to decide.
I ask for a opinion, what would happen in a moment when my hydroelectric station switchs to the islanded mode from the on grid mode(due to some...
But that's the problem Jim. I don't know how to link little motors with my application.
All I know is to write some code. I already got this http://www.mikroe.com/easyavr/v5a/
I can buy all those stuffs, but I am afraid I don't know how to use them
Actually I use to work a little bit with PLC's 2 years ago. 1 semester in college. But at that time I didn't realize the importance of PLC's or I was just lazy, I am not searching excuses, so basically after semester ended I stopped dealing with PLC's.
And basically in the college (at least mine...
I don't think there is anyone teaches Fortran anymore. Instead there are C,C++ C# and others. But basic principle is the same. If you know one of them, you can quickly get good at any(my opinion). YOu said "
I did use a few of these in 1990's for very specific tasks that had to be automated:"...
Ok, that sounds good :P
Following that Water flow is Q=n*k1*k2*Q_max_per_single_jet
In this case I don't need to care about how many nozzles/jets should currently work(1,2, or even total number n) to compensate current load demands, all I have to care about is value of k1 or k2, depending in...
I have got a problem. I want to expand my turbine model into multiple-jet turbine model.
The only difference between single-jet and multiple-jet is in the Q(m^3/s - water flow)
So far I calculated Q on this way:
Q=k1*k2*Q_max
Q_max-max water flow
k1-needle openness factor (from 0% till...
Yep I agree, if we keep jet shifter opened to the 50% half of the water power goes away. But How do you think to react on huge loading increases when the needle is slow.?
I was thinking about this: Can we somehow measure the current? When load increase my governor waits for speed change and...
I know reference in USA is 60Hz in Europe 50Hz and in Japan it's both 50 and 60.
My sentence wasn't regard on that. I said that to illustrate something but nvm I don't know how to explain it. Point is that I have thought that we keep frequency equal to 50Hz or 60Hz in USA just because of money...
So one of the solutions of this problem is cutting off feeders/consumers or like you call it "Load Shedding"? In that case, if you look my example(Load jumps from 150kW to 450kW), you want me to shed load with load shedding relays to prevent large frequency fall. Price of this is that some areas...
Thank you all on your posts, I've read them all, and they are helping me to understand this matter.
Now I will say a bit bit closer what I am trying to do. I want to simulate situation when my hydroelectric power station is connected to the grid, and for some unknown reason link between GRID...