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中国电机工程学报 2007, 27(6) 77-83 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电工电机 |
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自平衡电子电力变压器 |
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王丹 毛承雄 陆继明 |
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华中科技大学电气与电子工程学院 华中科技大学电气与电子工程学院 华中科技大学电气与电子工程学院 |
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摘要：
提出一种基于级联多电平结构，具有自平衡能力的电子电力变压器(A-EPT)，其高压侧采用单相全桥级联技术，低压侧采用交错并联技术，并根据其结构特点提出一种简单有效的控制方案。在该控制方案中，通过采用载波移相技术提高了等效开关频率和输入性能；通过引入相移补偿信号，避免了级联模块间的直流电压不平衡问题。对所提出的A-EPT进行建模和仿真，并与常规变压器的运行状况进行对比分析。仿真结果表明：A-EPT能够很好地实现当变压器任何一侧系统出现电压或电流不平衡时，另一侧系统仍然能够自动保持本侧系统的电压或电流平衡，并且调节过程短，比常规变压器具有更好的性能。 |
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关键词：
电子电力变压器
级联多电平
移相脉宽调制
自平衡
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Auto-balancing Electronic Power Transformer |
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Abstract:
A novel auto-balancing electronic power transformer(A-EPT) based on cascaded-multilevel converters was proposed. In the proposed A-EPT, the cascaded- multilevel converters were used for the high voltage stage, the interleaving parallel technology was adopted for the low voltage stage, and a simple effective control method was designed. In the proposed control scheme, the triangle carrier phase-shifted technique was used to obtain the high equivalent switching frequency and good input characteristic, and the corrected phase-shifted signals were introduced to achieve direct current(DC) capacitor voltage balance. Computer simulations were performed to verify the performance of the proposed A-EPT. The simulation results show that the proposed A-EPT can keep the system auto-balancing with fast regulation, and has much better performances than conventional power transformer. |
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Keywords:
electronic power transformer
cascaded- multilevel
phase-shifted pulse width modulation
auto- balancing
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收稿日期 2005-11-04 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 毛承雄 |
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作者简介: |
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作者Email: cxmao@263.net;cxmao@mail.hust.edu.cn |
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| 参考文献： |
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| 本刊中的类似文章 |
| 1．刘海波 毛承雄 陆继明 王丹.配电系统电子电力变压器非线性控制[J]. 中国电机工程学报, 2009,29(27): 1-8 |
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| Copyright by 中国电机工程学报 |
