With the advancement of technology, electric equipment and loads have become more sensitive to problems related to power quality, such as voltage sag, swell, imbalances, and harmonics. To detect faults and to protect sensitive loads from these voltage distortions, a Dynamic Voltage Restorer (DVR) series compensator is among the best available cost-effective solutions. One of the main goals of the DVR is to achieve a control structure that is robust, stable, and can handle properly the disturbances (e.g., grid voltage issues, load current, and fluctuations at the DC link voltage) and model uncertainties (e.g., inverters and filter parameters). In this work, a novel framework control strategy based on Uncertainty and Disturbance Estimator (UDE) is proposed to improve the response of the DVR to properly compensate the load voltage under a variety of power quality issues, particularly the ones associated with the grid voltage disturbances. Additionally, the stability of the proposed control system is analyzed and validated using the Lyapunov stability theory. The advantages of the new control system are robustness, simplified design, good harmonic rejection, low tracking error, fast response, and sinusoidal reference tracking without the need for voltage transformations or specific frequency tuning (e.g., abc-dq0 and Proportional-Resonant). This research uses the MATLAB/Simulink software to validate the effectiveness of the proposed scheme under a diverse set of conditions with no control limitations. Moreover, the designed controller is tested under real conditions using Hardware-In-the-Loop (HIL) validation with OPAL-RT real-time simulator coupled with a TI Launchpad microcontroller. The results demonstrate a good performance of the proposed control strategy for a quick transient response and a great harmonic rejection when subject to grid voltage distortions.

随着技术的进步，用电设备和负载对与电能质量相关的问题变得更加敏感，例如电压暂降、暂升、不平衡和谐波。为了检测故障并保护敏感负载免受这些电压失真的影响，动态电压恢复器 (DVR) 系列补偿器是现有的最佳成本效益解决方案之一。DVR 的主要目标之一是实现一个稳健、稳定的控制结构，并且能够正确处理干扰（例如，电网电压问题、负载电流和直流链路电压波动）和模型不确定性（例如，逆变器和滤波器参数）。在这项工作中，提出了一种基于不确定性和扰动估计器 (UDE) 的新型框架控制策略，以提高 DVR 在各种电能质量问题下，特别是与电网电压扰动相关的问题下的响应，以适当补偿负载电压。此外，使用 Lyapunov 稳定性理论对所提出的控制系统的稳定性进行了分析和验证。新控制系统的优点是鲁棒性、简化设计、良好的谐波抑制、低跟踪误差、快速响应和正弦参考跟踪，无需电压转换或特定频率调谐（例如，abc-dq0 和比例谐振）。本研究使用 MATLAB/Simulink 软件来验证所提出方案在没有控制限制的各种条件下的有效性。此外，所设计的控制器在实际条件下使用硬件在环 (HIL) 验证和 OPAL-RT 实时模拟器以及 TI Launchpad 微控制器进行测试。结果表明，在受到电网电压失真影响时，所提出的控制策略具有良好的性能，可实现快速瞬态响应和出色的谐波抑制。