Lifetime-based power routing of smart transformer with CHB and DAB converters

Smart Transformers (ST) are power electronic transformers capable of providing grid services and DC connectivity compared to conventional low-frequency transformers. However, failure of the components and consequent maintenance is one of the major challenges compared to it's counterpart, limiting its application. By controlling the power flowing through the cells in a modular ST architecture, the remaining lifetime of these cells can be controlled. The idea is to schedule the maintenance by actively controlling the lifetime of the individual cells using an optimization algorithm. The proposed algorithm has the ability to schedule the maintenances according to predefined maintenance intervals. A potential ST architecture consisting of Cascaded H-bridge (CHB) and Dual-Active Bridge (DAB) converters are analyzed with simulations and experiments to validate the proposed power routing algorithm and its impact on the lifetime and maintenance scheduling.

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“…8. Here, only the failure of DAB cells are shown since the effect of power routing algorithm on CHB is limited [11].…”

Section: Simulation Resultsmentioning

confidence: 99%

Lifetime Control of Modular Smart Transformers Considering the Maintenance Schedule

Raveendran

Andresen

Liserre

2018

2018 IEEE Energy Conversion Congress and Exposition (ECCE)

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“…To validate the impact of power routing for scheduling the maintenance by RUL equalization, a case study with ST comprising of 10CHB cells connected to 10 DAB cells is performed. The junction temperature of the converter cells for a mission profile is evaluated using the electro-thermal model of the ST [35] . Since the impact of unbalanced power sharing on the aging of CHB cells is minimal, the lifetime impact on CHB cells are not discussed here in detail, but can be obtained from [19] .…”

Section: Power Routing For Delaying the Maintenance Schedulementioning

confidence: 99%

Active thermal control for delaying maintenance of power electronics converters

Andresen

Kuprat

Raveendran

et al. 2018

Chin. J. Electr. Eng.

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Several studies have reported about power semiconductors and capacitors being the most sensitive components in power converters. The lifetime of these devices is associated with the mission profile and the resulting temperature profile. For preventing failures, it is of interest to estimate the Remaining Useful Lifetime(RUL) and several condition monitoring methods have been proposed for this purpose. Moreover, modular power converters consist of a high number of components and methods have been proposed to reduce the thermal stress and therefore extend the lifetime of a system with software, referred to as active thermal control. For power converters with limited accessibility, the RUL detected by the condition monitoring system may not fit to the scheduled maintenance of the system and devices may still have a significant RUL when their replacement is scheduled. Therefore, this work proposes to control the stress of the most deteriorated components in the system such that the failure probability of multiple building blocks is equalized when the next maintenance is scheduled. Moreover, this concept is proposed to extend the time to the next maintenance and reduce the number of maintenance instances without affecting the mean lifetime of the system.

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Power Converters Coolant: Past, Present, Future, and a Path Toward Active Thermal Control in Electrified Ship Power Systems

Moghassemi,

Rahman,

Ozkan

et al. 2023

IEEE Access

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Power converters have widespread applications in automotive, renewables, and power systems. The demand for power modules with low power consumption and high efficiency has increased due to advancements in semiconductor devices. So, power converters need to be highly efficient to reduce costs associated with energy dissipation and cooling requirements. This paper discusses various active thermal control methods for high-power power converters. It covers modulation and configuration techniques, ranging from single configurations to cascaded, modular, and multilevel converters. These concepts form the basis of power electronics building blocks, particularly relevant in all-electric ship systems. Power electronics building blocks represent a This article has been accepted for publication in IEEE Access.

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Lifetime-based power routing of smart transformer with CHB and DAB converters

Cited by 11 publications

References 14 publications

Lifetime Control of Modular Smart Transformers Considering the Maintenance Schedule

Lifetime Control of Modular Smart Transformers Considering the Maintenance Schedule

Active thermal control for delaying maintenance of power electronics converters

Power Converters Coolant: Past, Present, Future, and a Path Toward Active Thermal Control in Electrified Ship Power Systems

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