并网逆变器死区效应消去补偿方法研究
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贾学瑞(1989-),男,硕士研究生,研究方向为分布式电源并网技术;E-mail: 1606040986@qq.com

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A novel strategy of dead-time elimination and compensation for grid-tied inverters
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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。

    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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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,V44(5):30-35]

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  • 收稿日期:2015-05-24
  • 最后修改日期:2015-11-27
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  • 在线发布日期: 2016-02-26
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