[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 Sc<dxY@w7-  
situations. It provides simultaneous AC and DC power with least FQZ*i\G>>  
weight, volume and cost to meet the special requirement of mobile 7({)o
u x  
power networks. In this paper a mathematical model based on multiloop 2b"*~O;  
method, including speed regulator and excitation regulator, is 78&|^sq  
established to reflect the system operation aspect. The simulation z0 "DbZ;d  
results of voltage harmonics are compared with experiments to 8D*7{Q  
verify the validity of mathematical model. The DC side power 0m@+ &X>w  
oscillation and short circuit may result in system breakdown. The VvhfD2*T  
simulation program provides the guideline for system operation and ,-UF5U  
protection. The simulation results showed the factors that affect the vW+6_41ZM  
amplitude and frequency of the DC side power oscillation. The qaxis MxE]EJZ  
winding and feedback control of the DC load current on the ^m\o(R  
excitation voltage can increase s .. NRRJlY S  
w~3X m{  

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