| 引用本文: | 金宏,张友军,王诗颂,丁效平,朱翚,胡庆何.采用辅助变压器的全占空比调节三电平AC/AC变换器[J].电力自动化设备,2019,39(6): |
| JIN Hong,ZHANG Youjun,WANG Shisong,DING Xiaoping,ZHU Hui,HU Qinghe.Full-duty-cycle regulated three-level AC/AC converter with auxiliary transformer[J].Electric Power Automation Equipment,2019,39(6): |
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| 摘要: |
| 高压大功率变换场合下，传统三电平AC/AC变换器需要同时控制输出电压和飞跨电容电压，使得控制电路相对复杂，且输出电压和负载范围受到限制。为此提出了一种采用辅助变压器的全占空比调节三电平AC/AC变换器，其飞跨电容电压由辅助变压器直接供给，无需通过其他控制电路进行调节。该变换器只有输出电压1个控制对象，其控制简单、易于实现，可全占空比满幅调节输出电压，且辅助变压器的容量很小，只需略大于飞跨电容的无功负载。详细分析了电路工作原理，并研制了原理样机。实验结果表明，采用简单的控制电路就可实现三电平AC/AC变换器的全占空比满幅调节。 |
| 关键词: AC/AC变换器 三电平 飞跨电容 辅助变压器 全占空比调节 |
| DOI：10.16081/j.issn.1006-6047.2019.06.011 |
| 分类号:TM46 |
| 基金项目:国家自然科学基金资助项目(51477107)；中国博士后基金资助项目(2015M571805)；江苏省博士后基金资助项目(1402107C)；江苏省光谱成像与智能感知重点实验室2018年开放基金资助项目(3091801410402/8)；中央高校基本科研业务费专项资金资助项目(30918014106) |
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| Full-duty-cycle regulated three-level AC/AC converter with auxiliary transformer |
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JIN Hong, ZHANG Youjun, WANG Shisong, DING Xiaoping, ZHU Hui, HU Qinghe
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School of Mechanical & Electrical Engineering, Soochow University, Suzhou 215021, China
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| Abstract: |
| For high voltage and high power conversion applications, the traditional three-level AC/AC converter needs to control the output voltage as well as the flying capacitor voltage, which makes the control circuit relatively complicated and the ranges of output voltage and load limited. A full-duty-cycle three-level AC/AC converter with an auxiliary transformer is proposed. The voltage of the flying capacitor is directly supplied by the auxiliary transformer and does not need to be controlled by other control circuits. The proposed converter only controls the output voltage. Its control strategy is simple and easy to be realized. The output voltage can be adjusted with full-duty-cycle. The capacity of auxiliary transformer is very small which only needs to supply the reactive load of the flying capacitor. The operation principle of the circuit is analyzed in detail, and a prototype is designed. The experimental results show that the full-duty-cycle regulation of three-level AC/AC converter can be realized with a simple control circuit. |
| Key words: AC/AC converter three-level flying capacitor auxiliary transformer full-duty-cycle regulation |
