基于不同拓扑结构的十二相同步发电机整流电压波形分析

Analysis of Rectifier Voltage Waveform of Twelve-Phase Synchronous Generator Based on Different Topologies

传统中小功率十二相整流型同步发电机电压等级较低,整流装置通常采用4套不控整流单元并联结构。随着舰船中压直流综合电力技术的发展,整流发电系统的容量和电压等级大幅提升,十二相整流单元采用两并两串的拓扑结构可以适应发电机绕组较高的电压设计值,同时整流端中性线可引出用于电力推进调速装置的均压控制。分析了两并两串拓扑结构的不同联接组合型式,重点对两种可行的拓扑结构下的直流侧电压波形进行了解析计算,并通过仿真与试验验证了理论分析的正确性,证明了(Y1//Y3)+(Y2//Y4)拓扑结构为最优组合方式,具有最佳的直流电压品质。

The traditional medium and small power twelve-phase synchronous generator-rectifier had a low voltage level, and its rectifying device was usually composed of four sets of parallel uncontrolled rectifier units. With the development of medium voltage DC integrated power technology for ship, the capacity of the generation system and the voltage level were greatly improved. The rectification unit adopted two-parallel-two-series topology to avoid excessive voltage design value of the generator winding, and the rectifying terminal neutral line could lead to the equalization control for the electric propulsion speed regulating device. So the topology was gradually adopted. The different connection combinations of two-parallel-two-series topologies were analyzed. The DC-side voltage waveforms under two feasible topologies were analyzed and calculated. The correctness of theoretical analysis was verified by simulation and experiment. The(Y1//Y3)+(Y2//Y4) topology was the optimal combination with the best DC voltage quality.