Design and implementation of a multi‐port bidirectional converter for electric vehicle applications

Malik, Muhammad Zeeshan; Zhang, Shiqing; Ali, Amjad; Farooq, Ajmal

doi:10.1002/cta.3649

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…There are many associated challenges such as grid stability and bidirectional power flow control in hybrid energy systems (HESs) in electric vehicles that use multi-port bi-directional converters (Malik et al, 2023a;Malik et al, 2023b). With variable weather conditions, the PV system suffers low voltage at the output; in this scenario, the DC-DC boost converter becomes a very necessary part to get high voltage gain Malik et al (2017).…”

Section: Introductionmentioning

confidence: 99%

Digital resonant control of power converters under variable grid frequency conditions

Ijaz,

Nazir,

Alhussein

et al. 2023

Front. Energy Res.

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Introduction: The proportional resonant (PR) controller is known for its ability to effectively regulate sinusoidal current and voltage with low steady-state error. However, in the context of digital power systems, where operations are discrete in time, applying conventional PR controllers directly presents challenges. This study investigates the impact of various discretization methods on the performance of PR controllers, particularly under scenarios with varying reference frequencies.Methods: To assess the performance of digital PR controllers under varying reference frequency conditions, three discretization techniques are employed: zero-order hold (ZOH), impulse invariant (II), and zero pole matching (ZPM), in addition to the conventional deadbeat controller. These controllers are tested in conjunction with a single-phase pulse-width modulated (PWM) inverter, which is a crucial component in modern power systems.Results: Simulation results indicate the effectiveness of the different digital PR controllers in tracking both fixed and variable reference frequency signals while minimizing total harmonic distortion (THD) and steady-state error. When utilizing only the deadbeat controller, steady-state error and THD are measured at 4.9 V and 4.82%, respectively. However, the proposed ZPM-based digital PR controller significantly improves performance, reducing steady-state error to 0.12 V and THD to 0.45%, highlighting its superior performance.Discussion: The findings of this study emphasize the importance of choosing the appropriate discretization method when implementing PR controllers in digital power systems. The ZPM-based digital PR controller proves to be highly efficient in regulating power converters under varying grid frequency conditions. This research contributes to the understanding of digital PR controller behavior and its potential for improving power system performance, especially in scenarios with intermittent renewable energy resources and fluctuating grid frequencies.

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Section: Introductionmentioning

confidence: 99%

Digital resonant control of power converters under variable grid frequency conditions

Ijaz,

Nazir,

Alhussein

et al. 2023

Front. Energy Res.

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Mathematical modeling and stress‐aware stability analysis of a nonideal multiport Single Inductor DC–DC converter for renewable energy

Gupta,

Joshi

2024

Circuit Theory & Apps

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This paper proposes a novel configuration for a multiport boost converter (MPBC) with a single inductor (SI), accounting for equivalent series resistances (ESRs) and minimizing input switching stress. The MPBC performance is evaluated and compared with other established topologies. The proposed MPBC interfaces two unidirectional input DC power ports and a rechargeable port for an energy storage element (ESE) with two output ports. The design integrates two renewable sources with the ESE as a third source. One output is for higher voltage, linked to a single‐phase inverter for AC loads. The other output is for lower DC voltage, used for DC loads. The configuration can be adjusted based on requirements. This converter has numerous applications in renewable energy systems, electric vehicles, and agriculture. The steady‐state and small signal modeling of MPBC has been done to derive the mathematical expressions for analyzing stability, stresses (both voltage and current), and performance considering ESRs. A 240 W, MPBC is fabricated along with improved switching strategies using DSP TMS320F28379D. Experimental and simulation results are compared to show the effectiveness of proposed scheme on stability, stresses, and efficient power transfer. Output power is regulated effectively by sharing the input power thereby reducing voltage stress on switches.

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A novel topology of a non‐isolated bidirectional multiphase single inductor DC–DC converter

Igor Carvalho Lobato,

Berrehil El Kattel,

Marcelo Antunes

et al. 2024

Circuit Theory & Apps

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This paper introduces a novel topology for a non‐isolated bidirectional multiphase single inductor (BMPSIC) DC–DC converter. The proposed BMPSIC requires only a single inductor, irrespective of the number of arms, and features reduced volume and weight compared to the total magnetics needed for a conventional converter with similar ratings. The proposed BMPSIC advantages include a high DC voltage gain without operating on a large duty cycle, voltage stress on the power switches equal to that at the high‐voltage port, easy implementation, and a lower cost for application at high‐power densities. Furthermore, this topology requires only one current and voltage control loop. This paper thoroughly details the steady‐state operating principles of the inductor current continuous mode. It provides theoretical and mathematical analysis, including a comparative analysis of the proposed BMPSIC against earlier DC–DC converters, highlighting the superior performance and efficiency of the BMPSIC. An 8‐kW laboratory prototype, designed as a proof of concept, has been meticulously developed and tested, showcasing the performance of the converter across a broad range of load variations. The efficiency measured for the rated load exceeded 98.2% at the low‐voltage port of 250 V and the high‐voltage port of 400 V. Additionally, the article features Video S1, which illustrates the functioning of the converter.

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Design and implementation of a multi‐port bidirectional converter for electric vehicle applications

Cited by 3 publications

References 29 publications

Digital resonant control of power converters under variable grid frequency conditions

Digital resonant control of power converters under variable grid frequency conditions

Mathematical modeling and stress‐aware stability analysis of a nonideal multiport Single Inductor DC–DC converter for renewable energy

A novel topology of a non‐isolated bidirectional multiphase single inductor DC–DC converter

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