Open circuit fault detection and localization in modular multilevel converter

M. Sen, Muhannad Alaraj, Jae-Do Park
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引用次数: 0

Abstract

Modular multilevel converters (MMCs) have become attractive since being proposed for high voltage/power applications with their properties such as scalability, efficiency, redundancy and high quality output voltage and current. MMCs are comprised of many submodules which are typically made of insulated gate bipolar transistors (IGBTs) and diodes in the form of half-bridge cell and failure of these switches can be a major system operation and reliability issue. In this study, detection and localization of the submodule IGBT's open-circuit fault is investigated using a 5-level MMC model. Phase shifted pulse width modulation, circulating current suppression controller and voltage sorting-balancing algorithm are applied to get proper results in open loop condition. The proposed method is validated using Matlab/Simulink computer simulations.
模块化多电平变换器开路故障检测与定位
模块化多电平变换器(mmc)由于其可扩展性、高效性、冗余性和高质量输出电压和电流等特性而被广泛应用于高压/功率应用。mmc由许多子模块组成,这些子模块通常由绝缘栅双极晶体管(igbt)和半桥单元形式的二极管组成,这些开关的故障可能是主要的系统运行和可靠性问题。本文采用5级MMC模型对IGBT子模块开路故障的检测和定位进行了研究。在开环条件下,采用移相脉宽调制、循环电流抑制控制器和电压排序平衡算法来获得合适的结果。通过Matlab/Simulink计算机仿真验证了该方法的有效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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