DC Short Circuit Calculations
DC Short Circuit Calculations
(OP)
Does anyone have a reference for DC Short Circuit calculations? IEEE/ANSI, similar to the 242 Buff Book possibly? I am mostly interested in how a rectifier would be modeled and what is used for the commutating reactance. I have the ETAP DC module, but I would like to check the results. Thank you.






RE: DC Short Circuit Calculations
1. Is current limitation involved ? Some dc circuits are fed from electronic based equipment and will have current limitation incorporated. If so you will find that you can not base on simple calculations for short ciruit currents.
2. Rectified dc if reservior capacitors are utilised then you will find that the ripple currents experianced by these will cause them to burst.
3. Thyristor pulsing with dv/dt characteristics causing the thyristor to breakdown leading to ac appearing on the output.
4. generally dc circuits can produce a lot of power especially those from batteries. AC derived can be limited by the impedance of the supply and rectification. Also with ac rectified supplies a complex waveform is developed feeding the short
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
S.C. Calculating Procedures for DC Systems
AIEE Paper No. CP 57-811
Published May 31, 1957
(OLD IEEE article)
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
Some of the material in the "Art and Science of Protcetive Relaying"
http://www.geindustrial.com/multilin/notes/artsci/index.htm
was in this book.
The section on short circuit studies for DC systems was very good and even thought dated (1940-50s for some articals, the last issue I saw was published in the &0s)I sure would help you a lot. I may hav a copy of the DC paper, I'll check tonight.
IF anyone has the GE book hang on to it. If you could get permission from GE it would be a great reference on CD
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
The application is 750VDC, with several 12 pulse rectifiers in the 3000kW range.
RE: DC Short Circuit Calculations
RE: DC Short Circuit Calculations
IEC(EN)61660-1, short-circuit currents in D.C. auxiliary installations in power plants and substations