| 基于改进MPPT算法的微电网电能质量改善作用研究 |
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| 作者姓名： | 郭芳 邓长虹 廖毅 谭茂强 贺艳芝 |
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| 作者单位： | 1.中国能源建设集团广东省电力设计研究院有限公司，广州 510663 |
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| 摘 要： | 基于最大功率跟踪(MPPT)技术的光伏发电系统，其控制器输出功率参考值由MPPT算法实时计算得到。MPPT算法的快速性、准确性和稳定性可直接影响光伏发电系统的输出功率特性及发电质量。为此，结合单级式光伏并网发电系统的控制原理，分析了MPPT算法对光伏发电系统的控制作用；并针对一种常用变步长扰动算法存在的问题，结合光伏电池的数学模型，提出了一种改进的变步长扰动算法。该算法可有效提高跟踪速度和精度，降低功率波动，提高发电质量。最后，仿真分析了改进前后含光伏发电系统的微电网的电能质量，验证了改进MPPT算法对微电网电能质量的改善作用。
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| 关 键 词： | 光伏发电 MPPT 微电网 电能质量 |
| 收稿时间： | 2014-10-01 |
Research on Improvement of Micro-grid Power Quality Base on the Advanced MPPT Algorithm |
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| Affiliation: | 1.Guangdong Electric Power Design Institute Co., Ltd. of China Energy Engineering Group, Guangzhou 510663, China2.College of Electrical Engineering, Wuhan University, Wuhan 430072, China |
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| Abstract: | The power quality of PV generation is greatly affected by the maximum power point tracking (MPPT) algorithm. Researching an improvement measure of MPPT algorithm, is an effective way to reduce the power quality problems caused by the PV generation system and improve the micro grid power quality. The drawbacks of a commonly used variable step perturbation algorithm and its effects on the power quality of micro-grid are analyzed. According with the drawbacks, an improved variable step perturbation algorithm is proposed combining with the mathematical model of PV cells. And the simulation analysis show that through improving the MPPT algorithm can effectively improve the power quality of micro-grid which contains PV generation system. |
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