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首页> 外文期刊>Emerging and Selected Topics in Power Electronics, IEEE Journal of >An AC–AC Modular Multilevel Converter-Based Partially Rated Solid-State Transformer
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An AC–AC Modular Multilevel Converter-Based Partially Rated Solid-State Transformer

机译：基于AC-AC模块化多电平转换器的部分额定固态变压器

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摘要

Increasing penetration rate of the renewable energy resources in conjunction with emergence of new dynamic loads such as electric vehicles, necessitate more flexible, efficient, and economical operation of the power grid. To maximize the utilization of the power system infrastructure in an efficient and economical way, partially rated solid-state transformer (PSST) has been proposed to control the power flow and to improve the power quality. In this paper, based on a newly developed ac-ac modular multilevel converter (MMC), new PSSTs along with their supporting control strategies are proposed. The proposed PSSTs borrow the salient features of the MMC and are capable of controlling power flow, compensating voltage sag/swell, filtering the current harmonics, and removing unbalanced current components of the grid. Simulation studies in the PSCAD/EMTDC software environment are carried out to validate the performance and effectiveness of the proposed MMC-based PSSTs and the supporting control methods for different applications.
机译：可再生能源的渗透率不断提高，加上诸如电动汽车之类的新型动态负荷的出现，使得电网的运行更加灵活，高效和经济。为了以有效和经济的方式最大程度地利用电力系统基础架构，已经提出了部分额定功率的固态变压器（PSST），以控制功率流并改善功率质量。本文基于最新开发的交流-交流模块化多电平转换器（MMC），提出了新型PSST及其支持的控制策略。拟议的PSST借用了MMC的显着特征，并且能够控制功率流，补偿电压骤降/骤升，过滤电流谐波并消除电网的不平衡电流分量。在PSCAD / EMTDC软件环境中进行了仿真研究，以验证所提出的基于MMC的PSST的性能和有效性以及针对不同应用的支持控制方法。

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