[其它]Analysis of the DC side sudden short circuit of three-phasetwelve-phase synchronous generator system

Abstract: As a compact, light, cheap, reliable and high quality W&e'3gk_  
power source, the hybrid AC/DC power supply generator *:9 >W$0u  
(HADPSG) has been developing fast in the mobile power systems. ^+.t-3|U  
The most common fault in these systems is the short circuit in the H+VO.s.a  
DC load side. Research on the short circuit current peak 1a&/Zlr  
amplitude and peak instant is carried out to provide safe 5'X74`  
protection for the generator. Multi-loop method is used to LgP>u?]n  
establish the mathematical model of the system, and the transient IAP/G5'Q  
process of the short circuit is analyzed theoretically. The b+IOh|  
analytical expression of the short circuit current is obtained, and -4e)N*VVu  
the experimental results are compared with the theoretical O[IR|  
calculations and computer simulations. The phase current of the uZ\wwYY#M  
AC winding &er the short circuit fault is less than the normal A{z>D`d  
load value. The peak amplitude of the DC load current is 3+(yI 4  
determined by the AC and DC load before the short c .. _k_>aG23  
T2DF'f3A  

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