Hello experts,
In case of single-line-to-ground fault
- could you please explain why the Z0=Z1=Z2 if a Y/Y transformer solidly grounded?
- how about the Z0 compared with Z1 and Z2 in case of Delta/Y transformer if grounded?
Any reference is appreciated.
* Z0= zero-sequence impedance;Z1= positive-sequence impedance;Z2= negative-sequence impedance
Thank you.
Delta connection acts as a open circuit to the flow of zero sequence currents. Accordingly the impedance of the zero sequence network will be different. Refer to Electric Power Systems by BM Weedy and BJ Cory of John Wiley.
Hello
Please See :
http://ecourses.dbnet.ntua.gr/fsr/14800/Sequence%20Circuits.pdf
This source will help you very much (http://www.saadat.us):
http://www.psapublishing.com/
I used this book in my graduation, this modeling is very well done there. Unfortunately it is in Portuguese.
http://www.buscape.com.br/introducao-aos-sistemas-de-distribuicao-de-energia-eletrica-2-ed-kagan-nelson-8521205392.html?pos=1#precos
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