Hurry, hurry, hurry… Everyone, please come and help!
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I would like to ask everyone: in an infinitely large-capacity power system, how does the short-circuit current change when a short circuit occurs? Can it increase suddenly? Why?
In principle, it suddenly increases to a value at which the mother charger protection activates, causing the protection to trip.
This post was last edited by duke9894109 on 2010-5-23 at 15:22. I’m sending you a practical calculation tool for short-circuit current; you can download it and take a look. The three compressed files form one complete set, so you need to download all of them first and then unzip one of them.
The short-circuit current is the sum of a aperiodic component and a periodic component. The aperiodic component decays, while the periodic component of an infinite voltage source does not decay; at the moment of short-circuiting, a maximum value is necessarily reached within one cycle (0.02 seconds).
It is the moment when the short circuit occurs, --------------------- depending on the moment when the short circuit takes place