Increased utilization of nonlinear loads in the power distribution system with profound integration of renewable energy requires improved power quality control. This paper proposes a Reformed Second Order Generalized Integrated (R-SOGI) control scheme for enhancing the output of the Dynamic Voltage Restorer (DVR) for the objective of achieving the desired sinusoidal voltage wave shape at the common point of services and harmonic reduction. The DVR incorporates a Solar Photovoltaic (SPV) system using the Z-source Inverter (ZSI), providing the necessary active power to mitigate the voltage sag/swell and power demand. ZSI offers step-down as well as step-up abilities, it makes the converters to operate in the conditions of shoot-through. Therefore, the application of ZSI-based DVR topology seems very promising. The compensating reference voltage is generated by the R-SOGI algorithm, which offers superior output under conditions for grid voltage irregularities, including voltage sag/swell and unbalanced and distorted utility grid voltages. In comparison to DVR based on the VSI voltage inverter (VSI), the response from ZSI-DVR to a reduction of voltage distortions and harmonics is investigated. An experimental SPV ZSI-DVR prototype is developed in the laboratory to check the effectiveness of the controller and is tested under balanced and unbalanced supply and dynamic load conditions.

中文翻译：

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基于 Z 源逆变器的动态电压恢复器电路设计与 R-SOGI 控制方案以丰富电能质量

随着可再生能源的深度整合，配电系统中非线性负载的利用率增加，需要改进电能质量控制。本文提出了一种改进的二阶广义集成 (R-SOGI) 控制方案，用于增强动态电压恢复器 (DVR) 的输出，以实现服务公共点处所需的正弦电压波形并减少谐波。DVR 包含一个使用 Z 源逆变器 (ZSI) 的太阳能光伏 (SPV) 系统，提供必要的有功功率以减轻电压骤降/骤升和电力需求。ZSI 提供降压和升压能力，它使转换器能够在击穿条件下运行。因此，基于 ZSI 的 DVR 拓扑的应用似乎很有前景。补偿参考电压由 R-SOGI 算法生成，该算法在电网电压不规则情况下提供出色的输出，包括电压骤降/骤升以及不平衡和失真的公用电网电压。与基于 VSI 电压逆变器 (VSI) 的 DVR 相比，研究了 ZSI-DVR 对降低电压失真和谐波的响应。在实验室开发了一个实验性 SPV ZSI-DVR 原型，以检查控制器的有效性，并在平衡和不平衡电源和动态负载条件下进行测试。研究了 ZSI-DVR 对降低电压失真和谐波的响应。在实验室开发了一个实验性 SPV ZSI-DVR 原型，以检查控制器的有效性，并在平衡和不平衡电源和动态负载条件下进行测试。研究了 ZSI-DVR 对降低电压失真和谐波的响应。在实验室开发了一个实验性 SPV ZSI-DVR 原型，以检查控制器的有效性，并在平衡和不平衡电源和动态负载条件下进行测试。