[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 vbeE}7 *2  
power source, the hybrid AC/DC power supply generator ~ E6e~  
(HADPSG) has been developing fast in the mobile power systems. n:/!{.  
The most common fault in these systems is the short circuit in the >zX^*T#  
DC load side. Research on the short circuit current peak #UL75  
amplitude and peak instant is carried out to provide safe ZwLr>?0$ p  
protection for the generator. Multi-loop method is used to T*%GeY [  
establish the mathematical model of the system, and the transient 6JZ>&HA  
process of the short circuit is analyzed theoretically. The ]-{fr+  
analytical expression of the short circuit current is obtained, and i56Rdb  
the experimental results are compared with the theoretical s.Z{mnD6  
calculations and computer simulations. The phase current of the 'vVWUK956  
AC winding &er the short circuit fault is less than the normal r[}nrH&8  
load value. The peak amplitude of the DC load current is '#3FEo  
determined by the AC and DC load before the short c .. /96lvn]8lO  
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