Assessment of Aging and Performance Degradation of Supercapacitors Integrated into a Modular Multilevel Converter

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe) Pub Date : 2020-09-01 DOI:10.23919/EPE20ECCEEurope43536.2020.9215894

F. Errigo, L. Chedot, F. Morel, P. Venet, A. Sari, A. Hijazi, R. Pena

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引用次数: 4

Abstract

The interest for modular multilevel converter (MMC) with energy storage systems (ESSs) has increased quickly over the last decades. Since an MMC has several hundreds of sub-modules (SMs) and ESS performances usually deteriorate quickly, the ability of the converter to provide the expected service during its lifetime must be investigated. In this work, supercapacitors are used as ESS and the reduction of their capacity is first calculated through lifetime simulation of the ESS using aging models. Then, simulations are used to analyze the available energy of the proposed converter considering dispersions for the initial parameters of ESSs and for the aging rate. Finally, the results are compared with different levels of redundancy and maintenance intervals to discuss the viability of the solution. For the depicted case study, results show that oversizing the ESSs without carrying any maintenance operations during the lifetime of the converter minimizes the total number of cells required.

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集成在模块化多电平变换器中的超级电容器的老化和性能退化评估

在过去的几十年里，对具有储能系统(ess)的模块化多电平变换器(MMC)的兴趣迅速增加。由于MMC具有数百个子模块(SMs)，并且ESS性能通常会迅速恶化，因此必须研究转换器在其生命周期内提供预期服务的能力。在这项工作中，使用超级电容器作为ESS，并首先通过使用老化模型对ESS进行寿命模拟来计算其容量的减少。然后，通过仿真分析了该转换器的可用能量，并考虑了ESSs初始参数和老化速率的色散。最后，将结果与不同冗余级别和维护间隔进行比较，以讨论解决方案的可行性。对于所描述的案例研究，结果表明，在转换器的生命周期内，在不进行任何维护操作的情况下，扩大ESSs的规模可以使所需的电池总数最小化。

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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来源期刊

2020 22nd European Conference on Power Electronics and Applications (EPE'20 ECCE Europe)

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