Microgrid.. you mean decentralized power generation and consumption ? Doubt that, in general, DC machinery is more expensive than AC.
Adding to what have benn said before.. AC can be polyphase. AC machinery can grow much bigger than DC. This makes concentrated power generation cheaper.
"If an...
You mean synchronous generator, do you ?
Output of generator depends on two things: mechanical power input (torque on shaft) and excitation current.
With increase of output reactive power the output voltage is increasing too (other parameters const.). This is due to magnetic field behaviour in...
One more final word, to be more precise.
Just as mgtrp said, in case of regulating MVAr flow (increase production) there will be voltage increase on gen side (see synchronous machine V-I plot).
In that case, increasing HV tap on transformer (HV side voltage is fixed by the grid!) you are...
Hello
Changing taps on HV side does not affect LV side (generator). Power is still the same. There will be some increase in losses in transformer. Dielectrical strenght of transformer will be slightly lower (higher voltage) but short circuit withstand capability is increased (lower current on HV...
Hello
I haven't used ANSYS for FEM simulations - I'm into Ansoft Maxwell - so it'll be my guessing now.
Stranded means that conductor is made from many separate wires (like a string).
It is obvious that not 100% of condutor cross section is copper (or other conducting material).
So, by my...
Hello
As mentioned before, the problem is strictly thermal.
To be honest, it all depends on type of transformer (construction features) which affect temperature distribution in windings -> hot spots really can be a nightmare. 30% more losses - it's a serious problem.
On the other hand, I know...
Hi all
As someone stated, FEA can be dangerous.. "FEA will make great engineer from a good one, but it will make dangerous one from a bad engineer" that's how we describe this in firm
To be better at FEA ? expierence is essential (from my point of view).
As for the hand calc.. if it isn't too...
