Solar photovoltaic (PV) energy has met great attention in the electrical power generation field for its many advantages. The connection of the PV systems to the electrical network is performed through DC-DC converter and DC-AC inverter. This paper aims at enhancing the integration of the PV systems into the electrical network through controlling both the converter and the inverter. An adaptive reference PI (ARPI) controller for the inverter is introduced to enhance the system performance through supporting low voltage ride through (LVRT) capability, and smoothing the PV generated power fluctuations during variable environmental conditions. While the converter is used to achieve the maximum power point tracking (MPPT) of the PV system-based perturb and observe (P&O) algorithm at different environmental conditions. A comparison between the system performance using the proposed ARPI and an optimal PI controller optimized by harmony search (HS) is introduced to test the effectiveness of the proposed strategy.

太阳能光伏（PV）能源因其许多优点而在发电领域引起了极大的关注。光伏系统与电网的连接是通过DC-DC转换器和DC-AC逆变器进行的。本文旨在通过控制转换器和逆变器来增强光伏系统到电网的集成。引入了用于逆变器的自适应参考PI（ARPI）控制器，以通过支持低压穿越（LVRT）功能来增强系统性能，并消除可变环境条件下PV产生的功率波动。转换器用于实现基于光伏系统的扰动的最大功率点跟踪（MPPT），并在不同的环境条件下观察（P＆O）算法。