[其它]Simulation and operational protection of three-phase/twelve-phase hybrid AC-DC supply generator syst

Abstract: The hybrid AC-DC supply has been applied to various TN_$E&69I  
situations. It provides simultaneous AC and DC power with least d+ko"F|  
weight, volume and cost to meet the special requirement of mobile `bF;Ew;  
power networks. In this paper a mathematical model based on multiloop }@6 %yR  
method, including speed regulator and excitation regulator, is R*C+Yk)Tkt  
established to reflect the system operation aspect. The simulation Dx)XC?'xO  
results of voltage harmonics are compared with experiments to jn Y3G  
verify the validity of mathematical model. The DC side power 3(p6ak2lv  
oscillation and short circuit may result in system breakdown. The ^}\R]})w"  
simulation program provides the guideline for system operation and K8c#/o  
protection. The simulation results showed the factors that affect the &JM;jSz  
amplitude and frequency of the DC side power oscillation. The qaxis o
^6j(~  
winding and feedback control of the DC load current on the $zi\ /Yw  
excitation voltage can increase s .. `I{Q,HQ7  
^C|9K>M  

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