Power Smoothing Control Using Spline Function in Photovoltaic Generation System

2019 IEEE Decentralized Energy Access Solutions Workshop (DEAS) Pub Date : 2019-02-01 DOI:10.1109/DEAS.2019.8758737

A. Takahashi, Tatsuya Kajitani, S. Funabiki

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引用次数: 2

Abstract

This paper proposes a novel power smoothing control method using a spline function for a photovoltaic generation system. The spline function is sequentially created using the preceding average values of PV power. The command value of power smoothing control is determined by extrapolating the obtained spline function, which represents the long-term fluctuation components of PV power. The smoothing effect is evaluated by calculating the power in the targeted frequency band of the power flowing backward to the power grid. The proposed method is verified with 153 days of data measured in the PV system rated 1.75 MW. As a result, the smoothing effect was 51.8% with the proposed method in the case that the parameter of section time was 300 s. The rated capacity of energy storage system was 106 kWh. Then, it was indicated that the smoothing effect was increased and the short-term fluctuation of power flowing back to the power grid was reduced by setting the section time longer. Finally, the proposed method was compared with the power smoothing control using simple MA.

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基于样条函数的光伏发电系统功率平滑控制

针对光伏发电系统，提出了一种基于样条函数的功率平滑控制方法。使用前面PV功率的平均值依次创建样条函数。通过外推得到的样条函数来确定功率平滑控制的命令值，样条函数表示光伏功率的长期波动分量。通过计算返回电网的功率在目标频带内的功率来评价平滑效果。通过1.75 MW光伏系统153天的实测数据验证了该方法的有效性。结果表明，在截面时间参数为300 s的情况下，该方法的平滑效果为51.8%。储能系统的额定容量为106 kWh。结果表明，设置较长的分段时间可以增强平滑效果，减小回网功率的短期波动。最后，将该方法与基于简单MA的功率平滑控制方法进行了比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2019 IEEE Decentralized Energy Access Solutions Workshop (DEAS)

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