Department of Electrical and Electronic Engineering, Anhui Science and Technology University, Bengbu, China.
PLoS One. 2024 May 15;19(5):e0303591. doi: 10.1371/journal.pone.0303591. eCollection 2024.
To ensure that grid-connected currents are of high quality, it is crucial to optimize the dynamic performance of grid-connected inverters and their control. This study suggests using a combination of reduced-order linear active disturbance rejection control (LADRC) and a Proportional-Integral (PI) controller. By applying this control strategy to a single-phase photovoltaic grid-connected system, the system's ability to suppress grid harmonics is significantly improved. The validity and effectiveness of this control approach have been confirmed through simulations and experiments. The results show that the LADRC-based control system is robust and capable of rejecting disturbances, resulting in a significant reduction in the Total Harmonic Distortion (THD) of grid-connected currents. Comparative analysis with traditional control methods demonstrates the superior performance of the proposed approach.
为确保并网电流的高质量，优化并网逆变器及其控制的动态性能至关重要。本研究建议采用降阶线性自抗扰控制（LADRC）和比例积分（PI）控制器的组合。通过将这种控制策略应用于单相光伏并网系统，系统抑制电网谐波的能力得到了显著提高。通过仿真和实验验证了这种控制方法的有效性和有效性。结果表明，基于 LADRC 的控制系统具有鲁棒性和抗干扰能力，可显著降低并网电流的总谐波失真（THD）。与传统控制方法的比较分析证明了所提出方法的优越性能。
