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根据光伏电池阵列的输出I-U特性,提出了利用四段折线拟合法对该特性曲线进行分段拟合,并在此基础上设计了基于Buck电路的太阳能电池模拟器。模拟器采用输出电流反馈PI调节,提高了系统的动态性能以及稳态精度。通过仿真验证了设计的合理性。
According to the I-U characteristic of photovoltaic cell array, a four-segment line fitting method is proposed to segment the characteristic curve. Based on this, a solar cell simulator based on Buck circuit is designed. The simulator uses output current feedback PI regulation to improve the system’s dynamic performance and steady-state accuracy. The simulation proves the rationality of the design.