The photovoltaic converter (PVC) is a key device in a power-over-fiber system (PoFS). The aim of the work is to create a digital twin (DT) to predict the behaviour of PVC based on their specification data, which is the first step towards creating a universal DT of the entire PoFS. The paper considers the theoretical principles of operation of PVC using the zone theory of solids. A relationship has been established between the theoretical parameters and specification data of real converters. A five-element equivalent circuit of a PVC has been created and a DT in MATLAB Simulink has been developed on its basis. The dependences of the main parameters of the DT on the optical power at the converter input are calculated. Experiments were carried out on an installation with PVC of the YCH-H6424-15-FC-A brand. The optical powers at which all characteristics of the solar cell coincide with an accuracy of 2% are determined. The discrepancy between the calculated and experimental characteristics with increasing optical power is explained by the fact that the current transfer coefficient decreases at high current strength. This phenomenon is substantiated by the zone theory, but is not taken into account in the DT.

中文翻译：

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光纤输电系统光电转换器的数字孪生

光伏转换器（PVC）是光纤供电系统（PoFS）中的关键器件。这项工作的目的是创建一个数字孪生 (DT)，以根据 PVC 的规范数据预测其行为，这是创建整个 PoFS 的通用 DT 的第一步。本文利用固体区域理论探讨了 PVC 操作的理论原理。理论参数与实际转换器的规格数据之间建立了关系。创建了PVC的五元件等效电路，并在此基础上开发了MATLAB Simulink中的DT。计算了 DT 主要参数对转换器输入光功率的依赖性。实验在 YCH-H6424-15-FC-A 品牌的 PVC 装置上进行。确定太阳能电池的所有特性以2%的精度一致时的光功率。随着光功率增加，计算特性与实验特性之间的差异可以通过电流传输系数在高电流强度下降低的事实来解释。这种现象得到了区域理论的证实，但在 DT 中并未考虑到。