摘要
中高压、大容量电力电子变流系统中,二次回路的辅助电源对系统的可靠运行起着关键性的作用。但目前已有的辅助电源大都针对低压、中小容量的变流系统,且普遍有输入电压较低、输入电压范围较窄或效率较低的问题。为此,设计了一种适用于中高压、大容量电力电子变流系统的辅助电源。该电源的输入范围为400～2 000V,输出24 V直流电压,采用两级DC/DC拓扑结构,可以很好地实现宽范围输入并避免输入/输出隔离问题。推导了前级变换器传递函数并给出了该电源的小信号模型,对其进行了稳定性分析。最后进行了相关的实验,验证了所设计辅助电源的正确性和可行性。
For power electronic converter systems of medium-high voltage and large capacity, using of high-voltage and wide-range DC/DC auxiliary power supply （APS） in secondary circuits is essential for these systems＇ secure operation. However, the existing APS are mainly designed for low-voltage, small power converter systems, so normally, they have low input voltage, narrow input and low efficiency. Therefore, we designed a DC/DC APS for medium-high-voltage, large power converter systems. The APS could work with input of 400-2000 V and output of 24V output. It adopts a two-stage DC/DC topology that helps to realize the wide-range input and isolation. Besides, we derived the transfer function of the APS＇s forestage converter, presented a small signal model of the APS, and analyzed the APS＇s stability. Finally, through experiments, the proposed APS is proved to be both valid and feasible.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2014年第2期629-636,共8页
High Voltage Engineering
基金
国家自然科学基金(51177170)~~
