Power Routing in Modular Smart Transformers: Active Thermal Control Through Uneven Loading of Cells

Liserre, Marco; Andresen, Markus; Costa, Levy Ferreira; Buticchi, Giampaolo

doi:10.1109/mie.2016.2588898

Cited by 104 publications

(56 citation statements)

References 24 publications

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“…This leads to an unequal expected remaining lifetime of all parts. Instead of turning parts off, the concept of power routing operates the power converter under unequal loading conditions for the maximization of the time to the next maintenance [7].…”

Section: Power Routing In Modular Power Convertersmentioning

confidence: 99%

“…The same cell is repaired and becomes available as a replacement unit. Eventually, a ST modular system is composed of differently aged cells [7].…”

Section: Introductionmentioning

confidence: 99%

“…The proposed approach is not to shut down modules, but to route the power along different paths in partial load operation [7], [8], [9]. This enables to control the lifetime of the system and to extend the operation time for modules with high accumulated damage, which can be estimated with condition monitoring techniques.…”

Section: Introductionmentioning

confidence: 99%

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Lifetime-Based Power Routing in Parallel Converters for Smart Transformer Application

Andresen

Raveendran

Buticchi

et al. 2018

IEEE Trans. Ind. Electron.

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Abstract-The use of a Smart Transformer-based electrical distribution could be an effective approach to reorganize the electric grid, solving the problems and challenges of distributed generation systems and active loads. While lower efficiency and higher cost compared to the conventional transformer are well known and investigated limiting factors, the required higher maintenance, related to the use of electronics systems in the electric grid, is seldom targeted. In fact, high maintenance cost would make the use of Smart Transformer inapplicable even if new services could justify higher initial cost and new semiconductor development could increase the overall efficiency. This work proposes a modular repairable system based on condition monitoring, which aims at equalizing the lifetime consumption of the single modules to make possible prognostic maintenance.

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Section: Power Routing In Modular Power Convertersmentioning

confidence: 99%

“…The same cell is repaired and becomes available as a replacement unit. Eventually, a ST modular system is composed of differently aged cells [7].…”

Section: Introductionmentioning

confidence: 99%

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Lifetime-Based Power Routing in Parallel Converters for Smart Transformer Application

Andresen

Raveendran

Buticchi

et al. 2018

IEEE Trans. Ind. Electron.

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“…Solid-state transformer (SST) is a promising solution for flexible grid connectivity and power flow control with power electronic converters. A smart transformer (ST) can be defined as an SST with minimum two stages and enhanced ac and dc connection management capability through advanced identification and control algorithms [1]. The conventional low-frequency transformer offers very high reliability with decades of operation and low maintenance requirement compared to the SST.…”

Section: Introductionmentioning

confidence: 99%

“…The conventional low-frequency transformer offers very high reliability with decades of operation and low maintenance requirement compared to the SST. The "smart transformer" challenges the conventional SSTs by increasing reliability through advanced control strategies like "power routing" introduced in [1]- [3]. By unequal power distribution, power dependent failure mechanisms can be delayed to lower the maintenance requirements.…”

Section: Introductionmentioning

confidence: 99%

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Raveendran

Buticchi

Mercante³

2017

2017 IEEE Energy Conversion Congress and Exposition (ECCE)

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Abstract-For Smart Transformers (ST), reliability is one of the major problems when compared to the traditional lowfrequency transformers. Modular ST with advanced control algorithms could increase the reliability compared to the nonmodular solutions. This could be achieved by distributing differently the power among the cells depending on their aging. This unequal power transfer is a challenge for Cascaded HBridge converters (CHB). ST based on a CHB rectifier with different capacitor voltage balancing schemes are analyzed in the paper. The goal is to evaluate the best scheme for unequal power transfer while maintaining the dc-link voltages constant. The paper focuses on validating the operating power unbalance limits of each cell of the modular system for unbalanced power transfer while maintaining the voltage balance in the medium voltage dc-link stage. The power unbalance limits are established with analytical calculations and verified through simulations and experiments.

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Multilevel Converters – Control and Operation in Industrial Systems

León¹,

Vázquez²,

Franquelo³

2019

Power Electronics in Renewable Energy Systems and Smart Grid

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Power Routing in Modular Smart Transformers: Active Thermal Control Through Uneven Loading of Cells

Cited by 104 publications

References 24 publications

Lifetime-Based Power Routing in Parallel Converters for Smart Transformer Application

Lifetime-Based Power Routing in Parallel Converters for Smart Transformer Application

Comparison of voltage control methods of CHB converters for power routing in smart transformer

Multilevel Converters – Control and Operation in Industrial Systems

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