| 电网电压不平衡下逆变器功率波动平抑策略 |
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| 引用本文： | 朱晓青,严 威,李圣清. 电网电压不平衡下逆变器功率波动平抑策略[J]. 湖南工业大学学报, 2018, 32(3): 18-22 |
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| 作者姓名： | 朱晓青 严 威 李圣清 |
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| 作者单位： | 湖南工业大学电气与信息工程学院 |
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| 基金项目： | 湖南省自然科学基金资助项目（2017JJ4024），湖南省教育厅开放基金资助项目（15k036），湖南省重点实验 室基金资助项目（2016TP1018） |
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| 摘 要： | 电网电压的不平衡会使得光伏并网逆变器输出功率产生波动,为了消除这种不利影响,提出一种基于正序电压提取下的功率波动平抑策略。通过自适应陷波滤波器实现采样电压正序分量的提取,消除使得功率产生波动的分量,从而消除光伏并网逆变器输出功率的波动,实现对光伏并网逆变器的输出功率的有效控制。最后通过模型仿真和实验研究验证了该方法的可行性和有效性。
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| 关 键 词： | 不平衡电网电压；并网逆变器；正序电压；功率波动 |
| 收稿时间： | 2018-04-02 |
Power Fluctuation Suppression Strategy of the Inverter Under Unbalanced Grid Voltage |
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| ZHU Xiaoqing,YAN Wei and LI Shengqing. Power Fluctuation Suppression Strategy of the Inverter Under Unbalanced Grid Voltage[J]. Journal of Hnnnan University of Technology, 2018, 32(3): 18-22 |
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| Authors: | ZHU Xiaoqing YAN Wei LI Shengqing |
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| Abstract: | The imbalance of grid voltage will lead to the fluctuation of the output power of PV grid-connected inverter. In view of the elimination of this adverse effect, a proposal has thus been made of the power fluctuation suppression strategy based on positive sequence voltage extraction. By using the adaptive notch filter, an extraction can be achieved of the positive sequence components of sampled voltage, thus eliminating the components that result in the power fluctuation, with an effective control of the output power of PV grid connected inverter realized. Finally, the feasibility and effectiveness of the method can be verified by a model simulation and experimental research. |
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