This paper presents a two-stage three-phase solar photovoltaic (PV) system, which is controlled through a novel enhanced second order generalized integrator (ESOGI) based control technique. The proposed ESOGI is used for fundamental component extraction from nonlinear load current and distorted grid voltages. This integrator effectively and simultaneously manages to address the DC offset, inter-harmonic and integrator delay problems of the traditional SOGI. In addition, this control technique provides power factor correction, harmonic elimination, and load balancing functionalities. The ESOGI controller is used to generate reference grid currents for controlling the voltage source converter (VSC), interfacing the PV panel with the grid. Extensive experimental results on a developed prototype in the laboratory, depict that the total harmonic distortion (THD) of the grid injected currents and voltages are found well under IEEE-519 standard.

中文翻译：

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弱电网集成太阳能光伏系统的增强型SOGI控制器

本文提出了一种两级三相太阳能光伏 (PV) 系统，该系统通过一种基于新型增强型二阶广义积分器 (ESOGI) 的控制技术进行控制。建议的 ESOGI 用于从非线性负载电流和失真的电网电压中提取基本分量。该积分器同时有效地解决了传统 SOGI 的直流偏移、间谐波和积分器延迟问题。此外，该控制技术还提供功率因数校正、谐波消除和负载平衡功能。ESOGI 控制器用于生成参考电网电流，用于控制电压源转换器 (VSC)，将光伏电池板与电网连接起来。在实验室中对开发的原型进行了广泛的实验结果，