Design and Control Optimisation of a Novel Bypass-embedded Multilevel Multicell Inverter for Hybrid Electric Vehicle Drives

Li, Jinfeng

doi:10.1109/pedg48541.2020.9244313

Cited by 17 publications

(19 citation statements)

References 30 publications

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“…The author receives multi-disciplinary research skills training from University of Cambridge [50][51][52], Imperial College London [53], University of Southampton, and University of Birmingham [54,55]. Special acknowledge is attributed to Cambridge Nuclear Energy Centre and VTT Technical Research Centre of Finland for the code packages training [56,57].…”

Section: Acknowledgementmentioning

confidence: 99%

This article (AETiC V5N1 - Paper #1) has been withdrawn based on the request of the author(s). We apologise for any inconvenience caused.

Li¹

2021

AETiC

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Nuclear reactor core depletion and thermal-hydraulics coupling have long been calculation-intensive tasks challenging both nuclear industry development and academic research projects regarding computing budgets of memory and time. Albeit future evolution in smart computation hardware with artificial intelligence and quantum computing facilities embedded could continuously push the predictive modelling limit, the fundamental reactor physics model will still tip the balance in underpinning the prediction accuracy, as evidenced by a benchmark of two computational models in this work for characterising the depletion of highly self-shielded Gadolinium burnable poison-bearing fuel pins in assessing the British first European Pressurised Reactor’s start-up core performance. Specifically, a sub-group multi-annular-ring method is verified to efficiently represent the self-shielded skin effect, which addresses the deficiencies of classic equivalence models. The subgroup method is subsequently applied into a deterministic neutron transport code and a Monte Carlo stochastic code, respectively, for another benchmark. Resulting discrepancies in power peaking factors for the same assembly are less than 2% for the first fuel cycle, the agreement of which well demonstrates the validity of the proposed subgroup model. At the forefront of efforts to quantitatively understand the burnable poisons’ behaviour precisely for fuel optimisation (e.g., mitigating power peaking), this work could also be advantageously used for training purposes in boosting safety philosophy and public engagement in the roadmap for decarbonisation.

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Section: Acknowledgementmentioning

confidence: 99%

This article (AETiC V5N1 - Paper #1) has been withdrawn based on the request of the author(s). We apologise for any inconvenience caused.

Li¹

2021

AETiC

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“…In this context, LS-PWM is suitable for its application in multilevel converter topologies because it ensures low harmonic distortion [32][33][34] and is simple on its implementation structure respect to space-vector methods. For the proposed inverter topology, a LS-PWM technique has been implemented, hence the output voltage is synthesized as follows [11]:…”

Section: Modulation Schemementioning

confidence: 99%

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Reusser

Young

2021

Electronics

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In this paper, a novel four-level single-phase multilevel converter is introduced, consisting of six active switches arranged in a quasi-nested configuration. The proposed topology synthesizes its output voltage levels with respect to a floating neutral point, using four cascaded capacitors with identical voltage levels. The proposed converter contains a reduced number of components compared to the neutral point clamped (NPC) or active-NPC topologies (ANPC) for the same number of output voltage levels, since it does not require diode or active switch clamping to a neutral point. Moreover, no floating capacitors with asymmetric voltage levels are employed, thereby simplifying the capacitor voltage balancing. The switching operation principles, modulation technique and control scheme for supplying a single-phase resistive-inductive load are addressed in detail. The proposed four-level inverter allows generating an additional output voltage level with the same semiconductor count as conventional three-level inverters such as NPC and ANPC which allows a superior waveform quality, with a THDv reduction of 32.69% in comparison the clamped inverters. Experimental tests carried out in a laboratory-scale setup verify the feasibility of the proposed topology.

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“…V mid is controlled by pulse width modultion (PWM) of the gate driver signal. The output voltage, V out , depends on internal impedance, Z, output current, I out and open circuit battery voltage, V bat as in (15).…”

Section: Modulationmentioning

confidence: 99%

“…The AC current injection using power converters for AC system (grid tied inverter) is an well established technology where the power flows unidirectionally and has a significant voltage variation corresponding to current [14,15]. The unidirectional power flow of a single phase inverter is depicted in Figure 1a.…”

Section: Introductionmentioning

confidence: 99%

Versatile AC Current Control Technique for a Battery Using Power Converters

Islam

Park

2021

Batteries

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Although a battery is a DC device, AC current is often necessary for testing, preheating, impedance spectroscopy, and advanced charging. This paper presents a versatile control technique to inject AC current to a battery. Synchronous buck and H-bridge topologies are operated in bidirectional mode and controlled by uni-polar and bi-polar pulse width modulation techniques for the AC current injection. The input and output passive circuits are specially designed considering AC current and the properties of the battery. A controller is proposed considering a small internal impedance, small AC ripple voltage, and variable DC offset voltage of a battery. The controller is capable of maintaining stable operation of AC current injection in two power quadrant within a small DC voltage boundary of a battery. The controller is comprised of a feedback compensator, a feedforward term, and an estimator. The feedback gain is designed considering the internal impedance. The feedforward gain is designed based on estimated open circuit battery voltage and input voltage. The open circuit voltage estimator is designed based on filters and battery model. For validation, AC current is injected to a Valence U-12XP battery. The battery is rated for 40 Ah nominal capacity and 13.8 V nominal voltage The controller successfully injected AC current to a battery with +10 A, 0 A and −10 A DC currents. The magnitude and frequency of the AC current was up to 5 A and 2 kHz respectively.

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Design and Control Optimisation of a Novel Bypass-embedded Multilevel Multicell Inverter for Hybrid Electric Vehicle Drives

Cited by 17 publications

References 30 publications

This article (AETiC V5N1 - Paper #1) has been withdrawn based on the request of the author(s). We apologise for any inconvenience caused.

This article (AETiC V5N1 - Paper #1) has been withdrawn based on the request of the author(s). We apologise for any inconvenience caused.

Four-Level Quasi-Nested Inverter Topology for Single-Phase Applications

Versatile AC Current Control Technique for a Battery Using Power Converters

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