Photovoltaic (PV) systems require outdoor experiments to verify their functionality and reliability. However, outdoor experiments require complicated experimental set-ups including PV panels, power conversion circuits and controllers. In addition, the experimental data obtained from such systems can be easily affected by environmental conditions such as weather, temperature and season. Recently, PV emulation methods have been proposed that can emulate PV characteristics in the laboratory by connecting a DC supply to PV modules in parallel. However, the voltage characteristics of the conventional PV emulator are different from those of real PV panels, which degrades the accuracy of the PV emulator. This paper proposes an effective PV emulation method with accuracy improvements at the maximum power point of the PV panel, which is based on a simple circuit analysis. Using the proposed PV emulation method, the performance verification of a target PV system can be easily and accurately obtained. The proposed emulation method for PV power generation is experimentally verified by comparisons between it, the conventional emulation method and results obtained from outdoor experiments.

中文翻译：

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有效的光伏发电实验室测试方法，具有更高的光伏仿真精度

光伏（PV）系统需要进行户外实验，以验证其功能和可靠性。但是，户外实验需要复杂的实验装置，包括光伏电池板，电源转换电路和控制器。另外，从这样的系统获得的实验数据很容易受到诸如天气，温度和季节等环境条件的影响。近来，已经提出了PV仿真方法，该方法可以通过将DC电源并联连接到PV模块来在实验室中仿真PV特性。然而，常规PV仿真器的电压特性不同于真实PV面板的电压特性，这降低了PV仿真器的精度。本文提出了一种有效的PV仿真方法，该方法在PV面板的最大功率点上具有更高的精度，这是基于简单的电路分析。使用所提出的PV仿真方法，可以轻松而准确地获得目标PV系统的性能验证。通过将其与常规仿真方法以及从户外实验获得的结果进行比较，对所提出的光伏发电仿真方法进行了实验验证。