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Research on Reactor Parameters Calculation for Current Limiting in Different Access
Author(s): Zhao Tieying, Liu Junling
Pages: 40-
45
Year: 2015
Issue:
3
Journal: Electric Power Science and Engineering
Keyword: power system; short circuit; current limiting reactor; access way;
Abstract: Current limiting reactor has higher resistance value, so it is widely used in power system in order to lim-it short circuit current.Current limiting reactor is involved in whole process in short circuit fault, which affects short circuit current level directly.Through calculating reactor impedance the system needed, we can choose cur-rent limiting reactor with proper impedance value and maintain short-circuit current at an acceptable range during the fault.In accordance with two different access ways connecting to the electrical power system, this paper ana-lyzed short circuit transient process of a distributing network with current limiting reactor, focused on current chan-ging law in short circuit process, combined with the maximum current system can sustain in fault, concluded a method to calculate current limiting reactor resistance needed.The results show that the impedance needed to con-nect to the system is different in different access ways.In fault current limiter access way, limiting reactor will con-nect to the system shortly after the fault occurs, so we need to choose a higher impedance reactor in order to get the same current limiting effect.
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