两种星型自耦变压器升压模型研究Research on Step-Up Model of Two Star-Connected Autotransformers
王佳荣;陈小强;张正焓;
摘要(Abstract):
为使多脉波整流系统中的自耦变压器满足某些升压场合的应用,需对其结构进行改进设计。星型自耦变压器能显著提高功率密度,其结构可通过改变电源在原边的接入点实现升压。故基于12脉波整流系统分析了星型I和星型II自耦变压器升压数学模型,设计了对应的升压拓扑,给出了两种拓扑的升压范围,比较了相同升压比时两种拓扑的等效容量。在两种升压拓扑中,当升压比小于3时,随着升压比的增大,两种自耦变压器的等效容量增幅较大。当升压比大于等于3小于50时,随升压比的增大自耦变压器的等效容量增大较慢。当升压比大于50时,随升压比的增大自耦变压器的等效容量基本保持在各自稳定值,不再有较大波动。在相同升压比时,星型II自耦变压器升压拓扑较星型I自耦变压器升压拓扑容量小约15%,更适用于升压场合。仿真实验验证了理论分析的正确性。
关键词(KeyWords): 星型自耦变压器;升压模型;12脉波整流;等效容量分析;仿真实验
基金项目(Foundation): 国家自然科学基金(51367010);; 铁路总公司科技研究开发计划课题(2017J012-A)~~
作者(Author): 王佳荣;陈小强;张正焓;
Email:
DOI: 10.13335/j.1000-3673.pst.2017.2695
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