Transformer parameter easy and available for High voltage transformer above 11KV But I Need 11KV/400V step down transformer for my project.Please help me out.
In the lab you can find it with open and short circuit tests. Generally speaking a distribution TF has an impedance z= 4-6%, mainly inductive.
If you are working in India...
11 kV/400 V transformers are the most common transformers used in distribution. You can find them every where, beside the roads, probably even in your university campus. If you want the parameters, you can check the name plate details or the data sheets. Also you can approach any utility provider, like electricity boards of your area.
The transformers you specified is seemed to be distribution type. Before you start designing of a transformer firstly you have to consider the IS or IEC or the 'standard' according to which the transformer is to be made.
So far as parameters or standard features required for a distribution transformer are mainly but not limited to the followings
* Whether the transformer is dry type or oil cooled and whether forced or natural cooled.
*information about Ambient temperature, humidity and altitude is important
* Range of variation of 11KV supply voltage as the transformer core should not saturate at max input over voltage.
*Whether taps and tap changing switch to be provided in the 11 KV input side.
* The core loss of distribution transformer should be kept low.
* Impedance voltage around 5%(4-6) is recomended
* Losses should be within permissible limit.
* efficiency at 75% load is important
*humming noise should be low
* Designer should take care so that transformer should withstand basic insulation level i.e, 3/28/75 KV.
* Get sure whether the terminations will be out door type or with cable box.
* If oil cooled provide oil reserver with oil guage, silica gel breather, thermometer pocket
Hello Everyone,
Thank you all for your valueable answer but i think in simulation in matlab/simulink all these factor is not considered only require the
- Primary side R1 and L1,
- secondary side R2 and L2,
- Magnetization Rm and Lm,
- Nominal power and Frequency.
So, another doubt is if a am having all these parameter of frequency 60Hz So Is there same parameter for 50Hz or not?
Resistive parameters remain same. The inductive reactance changes in direct proportion to frequency.
Dear Praful Patidar,
You have written that your simulator demands the values as input for Primary side R1 and L1,secondary side R2 and L2,Magnetization Rm and Lm,Nominal power and Frequency. But as you know the reactive part i.e L1, L2, Lm are not linear over the entire range and near the operating region of transformer the magnetizing current hence primary inductance is nonlinear in nature please checkup whether your simulink consider this aspects or you can train your simulink program with the nature of nonlinearities near the operating point. To determine the impedance voltage and leakage reactance you need to input more parameters. Please also remember that a transformer design (insulation coordination) is never complete unless you consider the capacitance distribution in the winding's particularly for HV winding. So I think it will be better to consult a software where these aspects are considered or develop a software which can be trained to deal with all these aspects. May be you need to use Artificial Neural network and designing the software may not be that easy