| 引用本文: | 刘 钊,叶曙光,张 倩,邓海波,李林文,戴卓强.矩阵式双向变流器改进型换流策略[J].电力自动化设备,2015,35(3): |
| LIU Zhao,YE Shuguang,ZHANG Qian,DENG Haibo,LI Linwen,DAI Zhuoqiang.Improved commutation strategy for bidirectional converter based on matrix converter[J].Electric Power Automation Equipment,2015,35(3): |
|
| 摘要: |
| 针对基于矩阵式变换器的双向变流器电压电流型一步换流策略进行研究。通过分析电压电流型一步换流中存在的问题，指出其在输入相电压相对大小判断不准确时会使得输入电流波形畸变，并提出了基于过渡区间两步换流的改进型换流策略。通过在输入相电压大小相近时设置合适宽度的过渡区间，在过渡区间内采用两步换流，在过渡区间外采用一步换流，从而有效地避免了电压扇区判断错误的情况。最后通过仿真模型和实验样机，对所提出的改进型换流策略的有效性和正确性进行了仿真和实验验证，结果证明所提换流策略能准确地判断电压扇区所在空间，改善输入电流波形。 |
| 关键词: 变换器 矩阵式变换器 双向变流器 电流型换流策略 一步换流 过渡区间 |
| DOI： |
| 分类号: |
| 基金项目: |
|
| Improved commutation strategy for bidirectional converter based on matrix converter |
|
LIU Zhao1, YE Shuguang2, ZHANG Qian2, DENG Haibo2, LI Linwen2, DAI Zhuoqiang3
|
|
1.Nanjing Research Institute of Electronics Technology，Nanjing 210039，China;2.Jiangsu King Source Electric Power Technology Co.，Ltd.，Nanjing 210018，China;3.Wujing Thermal Power Plant of Shanghai Power Company，Shanghai 200241，China
|
| Abstract: |
| The current-voltage one-step commutation strategy for bidirectional converter based on matrix converter is researched. The existing problems of current-voltage one-step commutation are analyzed and it is pointed out that，the inaccurate judgment of input relative voltage will distort the input current waveform. An improved commutation strategy based on “two-step commutation within intermediate interval” is proposed，which sets an intermediate interval with appropriate width when the input voltages are similar and adopts the two-step commutation within the interval while keeps the one-step commutation outside the interval，effectively avoiding the voltage sector judgment error. The effectiveness and correctness of the proposed commutation strategy are verified by simulation and experiment，which shows that，the voltage space sector is accurately determined and the input current waveform is improved. |
| Key words: electric converters matrix converter bidirectional converter current-controlled commutation strategy one-step commutation intermediate interval |
