Due to significant growth of the industrial companies and domestic electricity consumers along with appearance of the sensitive electrical and electronic equipment, the proper standard services have been more requested to provide high-quality electrical energy. Dynamic voltage restorer (DVR) is a custom power electronic which is located in series with sensitive load and grid to mitigate the voltage sag and swell by injecting the relevant compensating voltage. High cost price of this compensator is related to its power supplies that it is replaced with renewable energy to make it cost-effectiveness and eco-friendly. Furthermore, the structure of multilevel inverter has a significant effect on providing high-quality compensating voltage. In this paper, a novel HCMLI coupled to photovoltaic power source is proposed as AC-voltage synthesizer for DVR to accurately compensate any voltage disturbances. Photovoltaic system can provide the required DC voltage with respect to voltage fluctuation range with low distortion. The step-creation capability and cost-effectiveness of the DVR based on proposed AC voltage synthesizer have been thoroughly evaluated. Feasibility of this multilevel inverter has correspondingly validated by the experimental results. Likewise, the performance of proposed DVR has been compared with conventional DVR and evaluated under different types of voltage disturbances. At last, the simulation results have confirmed the compensation capability of proposed DVR with proposed AC-voltage synthesizer as compared with the conventional DVR to mitigate different sags and swells.

中文翻译：

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半级联多电平逆变器耦合光伏电源用于动态电压恢复器的交流电压合成器提高电压质量

由于工业企业和国内电力消费者的显着增长，以及敏感电子电气设备的出现，对提供优质电能的适当标准服务提出了更高的要求。动态电压恢复器 (DVR) 是一种定制的电力电子设备，它与敏感负载和电网串联，通过注入相关的补偿电压来缓解电压骤降和骤升。这种补偿器的高成本与它的电源有关，它被可再生能源替代，使其具有成本效益和环保性。此外，多电平逆变器的结构对提供高质量的补偿电压有显着的影响。在这篇论文中，提出了一种与光伏电源耦合的新型 HCMLI 作为 DVR 的交流电压合成器，以准确补偿任何电压干扰。光伏系统可以提供相对于电压波动范围所需的直流电压，失真小。基于所提出的交流电压合成器的 DVR 的步进创建能力和成本效益已经过全面评估。实验结果相应验证了该多电平逆变器的可行性。同样，所提出的 DVR 的性能已与传统 DVR 进行了比较，并在不同类型的电压干扰下进行了评估。最后，仿真结果证实了与传统 DVR 相比，所提出的带有交流电压合成器的 DVR 的补偿能力，以减轻不同的骤降和骤升。