Filter design for grid-connected multilevel CHB inverter for battery energy storage systems

Lahlou, Taha; Abdelrahem, Mohamed; Valdés, Susana Ruíz; Herzog, Hans-Georg

doi:10.1109/speedam.2016.7525972

Cited by 26 publications

(4 citation statements)

References 8 publications

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“…The computation of the filter inductance for converters controlled by the Nearest Level Modulation (NLM) differs from those modulated by Phase Shift PWM [30]. In the former scenario, the maximum voltage ripple experienced from the filter inductance aligns with the maximum step amplitude calculated by the modulation.…”

Section: Filter Designmentioning

confidence: 99%

AC Direct Charging for Electric Vehicles via a Reconfigurable Cascaded Multilevel Converter

Tresca,

Zanchetta

2024

Energies

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This paper presents a charging architecture for the Reconfigurable Cascaded Multilevel converter, which was specifically designed for electric vehicle (EV) powertrain applications. The RCMC topology is capable of executing power conversion and actively managing battery systems concurrently. The active battery management is achieved using the Reconfigurable Battery Module, which regulates the serial connection of cells via a switch pattern. In this paper, the RCMC is directly interfaced with an AC three-phase power system, facilitating the dynamic control over battery cells charging. Its inherent design allows for the implementation of various charging algorithms, customizable to specific requirements, without necessitating additional intermediary power stages. Firstly, an overview of the RCMC topology is given, and an analysis to define the optimal filter inductance is carried out. Subsequently, after the AC system characteristics are explained, two charging algorithms are presented and described: one prioritizes State of Charge (SOC) balancing among battery cells, while the other focuses on minimizing power losses. Moreover, a time estimation computation for the RCMC is carried out considering a two-level AC charging station. The result is compared with the time required for a conventional battery pack. The results show a reduction of 10 s in charging time for a mere 20% increase in SOC. Finally, the experimental setup is presented and used to validate the efficacy of the proposed algorithms.

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Section: Filter Designmentioning

confidence: 99%

AC Direct Charging for Electric Vehicles via a Reconfigurable Cascaded Multilevel Converter

Tresca,

Zanchetta

2024

Energies

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“…The RCMC is compared with a two-level inverter and a CHB grid tie, described in [9]. Table I summarizes the key features of the converters and system simulated.…”

Section: Comparison With Two-level Inverter and Chbmentioning

confidence: 99%

“…The filter inductance is designed according to the current ripple method. According to [9], the CHB and the two-level inverter need an inductive filter of 3.9 mH and 6.4 mH, assuming a current value equal to 36 A and allowing a 5% of maximum current ripple. The inductive filter calculated for the RCMC is equal to 1.2 mH, which is 70% and 80% smaller than the two-level inverter and CHB, respectively.…”

Section: A Filter Designmentioning

confidence: 99%

Reconfigurable Cascaded Multilevel Converter design for Battery Energy System Storage

Tresca

Formentini

Salvo

et al. 2022

2022 International Symposium on Power Electronics, Electrical Drives, Automation and Motion (SPEEDAM)

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This paper presents the Reconfigurable Cascaded Multilevel converter employed for battery energy storage systems. The main advantage lies on the possibility to fully control each battery cell, improving the overall performances of the storage system. Indeed, the Reconfigurable Cascaded Multilevel Converter is compared with a CHB grid tie converter and two-level inverter, in terms of filter design, power losses and battery losses. The analysis results show that, under the same operative condition, the inductive filter required is at least 70% less than the other two topologies. Moreover, the RCMC provides the highest converter efficiency in all operative conditions.

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“…The minimum inductance value of Lf, can then be formulated as follows with the assumption that the maximum ripple current occurred at 50 % duty cycle [20].…”

Section: Converter Side Inductor Lf and Grid Side Inductor Lgmentioning

confidence: 99%

LCL-filter design and analysis for PWM recuperating system used in DC traction power substation

Sabran

Toh

Tan

2022

IJPEDS

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Voltage source inverter (VSI) had been used in dc traction power substation to deliver the trains braking energy back to the utility grid. To mitigate low order harmonics components, pulse-width-modulation (PWM) technique is commonly used in VSI controlled. As a result, the ac voltage and current waveforms may contain high frequency ripples. This paper proposes to mitigate the high frequency harmonics using LCL-filter with series <em>R</em>-damper. This filter offers good attenuation on harmonics with smaller size compare to other passive filter topologies. Theoretical analysis and simulation verification are conducted in designing the proposed filter. System level simulation had also been carried out. Sinusoidal grid current and voltage waveforms are recorded (THD<2%). This paper also includes damping losses analysis in conjunction with resonance peak suppression in designing the <em>R</em>-damper.

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Filter design for grid-connected multilevel CHB inverter for battery energy storage systems

Cited by 26 publications

References 8 publications

AC Direct Charging for Electric Vehicles via a Reconfigurable Cascaded Multilevel Converter

AC Direct Charging for Electric Vehicles via a Reconfigurable Cascaded Multilevel Converter

Reconfigurable Cascaded Multilevel Converter design for Battery Energy System Storage

LCL-filter design and analysis for PWM recuperating system used in DC traction power substation

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