| 引用本文: | 贾学瑞,粟时平,刘桂英,等.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. |
| JIA Xuerui,SU Shiping,LIU Guiying,et al.A novel strategy of dead-time elimination and compensation for grid-tied inverters[J].Power System Protection and Control,2016,44(5):30-35 |
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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。 |
| 关键词: 并网逆变器 死区效应 零电流箝位 消去 补偿 |
| DOI：10.7667/PSPC150870 |
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| A novel strategy of dead-time elimination and compensation for grid-tied inverters |
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JIA Xuerui, SU Shiping, LIU Guiying, LÜ Chao, ZHANG Yi
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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. |
| Key words: grid-tied inverter dead-time effect zero-current clamping elimination compensation |
