[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 $c}-/U 8  
situations. It provides simultaneous AC and DC power with least 9s&Tv&%VN  
weight, volume and cost to meet the special requirement of mobile 5Sx.'o$  
power networks. In this paper a mathematical model based on multiloop vXT>Dc2\!  
method, including speed regulator and excitation regulator, is Z,7VOf6g  
established to reflect the system operation aspect. The simulation +~f=L
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results of voltage harmonics are compared with experiments to !8OgaMngzF  
verify the validity of mathematical model. The DC side power g[$4a4X  
oscillation and short circuit may result in system breakdown. The hD9b2KZv  
simulation program provides the guideline for system operation and 'mO>hD`V  
protection. The simulation results showed the factors that affect the MZ"|Jn  
amplitude and frequency of the DC side power oscillation. The qaxis TeNPuY~WP  
winding and feedback control of the DC load current on the 17F<vo>l%  
excitation voltage can increase s .. W.Z`kH *B  
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