摘要
描述了适用于直驱型风力发电系统整流变换的12脉波整流电路。该电路拓扑中采用两个六脉波整流桥串联,并通过移相变压器实现12脉波输出。其交流侧可以得到THD值小于3%的正弦电流。该拓扑结构只使用无源器件,并且在达到同样性能的前提下比其他整流电路所用器件少很多,降低了成本。此外,与其他多脉波整流器相比,可以附加一个额外的低功率谐波注入电路以提高该拓扑结构抑制谐波的性能。
A new converter topology for 12-pulse rectifier circuit is described, which is especially suitable for directdrive wind power system applications. Two six-pulse rectifier bridges are connected in series, fed by a phase-shifting transformer, to form a 12-pulse system. Therefore, this converter draws almost sinusoidal currents from the AC system with very low harmonic content, typically less than 3% total harmonic distortion. The topology uses only passive components and has a lower component count than other rectifier circuits with similar performance. An additional low power harmonic injection circuit enhances the performance of the circuit to obtain low harmonic current pollution levels that are comparable with those achieved from other muhi-pulse rectifier.
出处
《电源技术应用》
2007年第12期8-12,共5页
Power Supply Technologles and Applications
基金
中国博士后基金(20060390092)
关键词
直驱型风力发电系统
2脉波整流
移相变压器
谐波注入
direct-drive wind power system
12-pulse rectifier
phase-shifting transformer
harmonic injection
