This article presents a dynamic voltage restorer (DVR) topology based on the adaptive noise canceling (ANC) technique, which can be used for both voltage compensation and harmonic mitigation. Furthermore, this article aims to investigate the DVR performance when installed in a microgrid (MG) during both normal operation of the utility and during utility disturbances. One of the main objectives of this article is to reduce the cost of inverter-based DVR by reducing both the size of the dc-link capacitor and rating of switching elements. The voltage of the dc-link capacitor is regulated to low voltage level using a transformer and a pulsewidth modulation (PWM) rectifier to achieve both effective voltage regulation and drawing a sinusoidal line current from the grid and thus not to contribute to the increase of the THD of the utility current. Furthermore, the voltage across the switches can be limited to low value by an adequate design of dc-link capacitor size, capacitor voltage, and sag level to be compensated. Finally, the effectiveness and fast response of the proposed DVR for the compensation of voltage disturbances and current harmonics is confirmed by simulation using MATLAB/Simulink during the steady-state and transient operations to analyze the performance of the scheme under different operating conditions.

中文翻译：

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微电网系统中带在线调节直流母线电容器的动态电压恢复器的控制和运行

本文介绍了一种基于自适应噪声消除 (ANC) 技术的动态电压恢复器 (DVR) 拓扑，该技术可用于电压补偿和谐波抑制。此外，本文旨在研究在公用事业正常运行和公用事业干扰期间安装在微电网 (MG) 中的 DVR 性能。本文的主要目标之一是通过减小直流链路电容器的尺寸和开关元件的额定值来降低基于逆变器的 DVR 的成本。使用变压器和脉宽调制 (PWM) 整流器将直流母线电容器的电压调节到低电压水平，以实现有效的电压调节和从电网汲取正弦线电流，从而不会增加市电电流的 THD。此外，通过适当设计直流链路电容器尺寸、电容器电压和要补偿的跌落水平，可以将开关两端的电压限制在较低的值。最后，通过在稳态和瞬态运行期间使用 MATLAB/Simulink 进行仿真，分析该方案在不同运行条件下的性能，证实了所提出的 DVR 对电压扰动和电流谐波补偿的有效性和快速响应。