| 并网逆变器死区效应消去补偿方法研究 |
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| 引用本文： | 贾学瑞,粟时平,刘桂英,吕超,张意. 并网逆变器死区效应消去补偿方法研究[J]. 电力系统保护与控制, 2016, 44(5): 30-35 |
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| 作者姓名： | 贾学瑞 粟时平 刘桂英 吕超 张意 |
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| 作者单位： | 智能电网运行与控制湖南省重点实验室(长沙理工大学)，湖南 长沙 410004,智能电网运行与控制湖南省重点实验室(长沙理工大学)，湖南 长沙 410004,智能电网运行与控制湖南省重点实验室(长沙理工大学)，湖南 长沙 410004,智能电网运行与控制湖南省重点实验室(长沙理工大学)，湖南 长沙 410004,智能电网运行与控制湖南省重点实验室(长沙理工大学)，湖南 长沙 410004 |
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| 摘 要： | 针对并网逆变器死区效应问题，在充分分析并网逆变器工作特点及零电流箝位现象的基础上，提出了一种新颖的逆变器死区效应消去补偿方法。该方法在非过零区域依据并网电流的方向选择有效开关管，屏蔽无效开关，在过零区域根据并网电流的大小进行前馈补偿。与传统死区消去和补偿方法相比，该方法充分考虑了零电流箝位现象，能够更好地抑制电流过零处逆变器输出电压波形畸变，有效消除了死区效应的影响，降低输出电压谐波含量，从而改善并网电流质量。利用Matlab/Simulink仿真软件进行了仿真验证，仿真结果证明了逆变器死区效应消去补偿方法的有效性和正确性。
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| 关 键 词： | 并网逆变器；死区效应；零电流箝位；消去；补偿 |
| 收稿时间： | 2015-05-24 |
| 修稿时间： | 2015-11-27 |
A novel strategy of dead-time elimination and compensation for grid-tied inverters |
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| Affiliation: | Hunan Province Key Laboratory of Smart Grids Operation and Control (Changsha University of Science and Technology), Changsha 410004, China,Hunan Province Key Laboratory of Smart Grids Operation and Control (Changsha University of Science and Technology), Changsha 410004, China,Hunan Province Key Laboratory of Smart Grids Operation and Control (Changsha University of Science and Technology), Changsha 410004, China,Hunan Province Key Laboratory of Smart Grids Operation and Control (Changsha University of Science and Technology), Changsha 410004, China and Hunan Province Key Laboratory of Smart Grids Operation and Control (Changsha University of Science and Technology), Changsha 410004, China |
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| Abstract: | A novel dead-time elimination and compensation method based on full analysis of the feature of the grid-tied inverter and zero-current clamping phenomenon is presented to eliminate the dead-time effect of grid-tied inverter. The effective switch transistor is chosen according to the direction of grid current in the non-zero current zone and the control strategy is feed-forward compensation in the zero current zone. In comparison with traditional dead-time elimination and compensation methods, the proposed method can better restrain the output distortion in the zero current zone, effectively eliminate the dead-zone effect, reduce THD, and thereby improve grid-connected current quality due to full consideration of zero-current clamping phenomenon. The Matlab/Simulink simulation results demonstrate the effectiveness and validity of the proposed method. |
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| Keywords: | grid-tied inverter dead-time effect zero-current clamping elimination compensation |
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