On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

Siton, Yarden; Sitbon, Moshe; Aharon, Ilan; Lineykin, Simon; Baimel, Dmitry; Kuperman, Alon

doi:10.3390/electronics12091994

Cited by 4 publications

(5 citation statements)

References 37 publications

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“…Or PW M&sign(v S (t)) (2) PW M(−)&sign(v S (t)) (1) PW M&sign(v S (t)) (1) Or PW M&sign(v S (t)) (1) PW M(−)&sign(v S (t))…”

Section: Discussionmentioning

confidence: 99%

“…Thus, the rectifier is required to operate continuously to keep a near unity power factor and eliminate all harmonics. This principle of operation is valid for single-phase or three-phase rectifiers [2]. For this purpose, the boost converter is the most widespread rectifier; However, it imposes a minimum DC bus voltage of ~375 V (to preserve continuous operation at the maximum amplitude of the sine wave).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier

Oren,

Dahan,

Shmaryahu

et al. 2024

Inventions

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A new type of single–conversion–step wide–input–range versatile step–up/down three–voltage–level power–factor correction stage is presented in this manuscript. The rectifier can operate both in continuous–conduction mode and discontinuous–conduction mode. First, the rectifier’s principle of operation is described, and then the innovative rectifier is analyzed in continuous and discontinuous–conduction modes. After, an average model for the innovative rectifier is developed. Lastly, the proposed theory is experimentally validated using a multiplier–less dual–control–loop mode at discontinuous–conduction modes. It is shown that although no multiplier is used in the control circuitry, the power factor is near unity. It is revealed that the rectifier can swing the output voltage from 50 V to 900 V while the input voltage is 230 Vrms. Although the rectifier output has a split DC bus with three voltage levels, the required control effort is low, and the output voltage is balanced. The innovative topology suits any standard power–factor correction rectifier application, dual–stage low–voltage power supply, and three–level voltage supplement for low–harmonic inverters. Since the rectifier’s output–voltage swing is extremely wide, energy storage systems and electric vehicle batteries are suitable applications.

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“…Or PW M&sign(v S (t)) (2) PW M(−)&sign(v S (t)) (1) PW M&sign(v S (t)) (1) Or PW M&sign(v S (t)) (1) PW M(−)&sign(v S (t))…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier

Oren,

Dahan,

Shmaryahu

et al. 2024

Inventions

Self Cite

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show abstract

“…It is interesting to note that, upon a decrease in power factor, the first harmonic magnitude reduces while the rest of the harmonic magnitudes inrease. As shown in [36,39] (and evident from Figure 4), normalized partial upper DC-side power components 𝑝 , 𝑝 , 𝑝 are given by ( ) ( )…”

Section: Steady-state Generalization and Evaluation Of Pulsating Comp...mentioning

confidence: 99%

“…Previous studies evaluated these fluctuations using complex and non-analytical neutral point expressions [34,35]. Another study proposed a methodology based on instantaneous split DC coupling forces, which allows for an analytical and intuitive quantification of corresponding voltage fluctuations [36]. However, these methodologies were developed for the unity power factor only and do not account for arbitrary power factor operation.…”

Section: Introductionmentioning

confidence: 99%

Generalization of Split DC Link Voltages Behavior in Three-Phase-Level Converters Operating with Arbitrary Power Factor with Restricted Zero-Sequence Component

Siton,

Kuperman

2023

Electronics

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This article examines the impact of a power factor on the behavior of partial DC link voltages in three-phase three-level AC/DC (or DC/AC) converters operating without additional balancing hardware. We consider the case in which the controller utilizes a bandwidth-restricted (DC in steady state) zero-sequence component to achieve average partial DC link voltage equalization since the injection of high-order zero-sequence components is impossible or forbidden. An assessment of partial split DC-link capacitor voltage behavior (particularly that of ripple magnitudes and phases) is necessary for, e.g., minimizing the values of DC link capacitances and selecting reference voltage values. Previous studies assessed the abovementioned behavior analytically for operation under a unity power factor based on third-harmonic-dominated split partial voltages’ ripple nature. However, it is shown here that deviation from the unity power factor introduces additional (to the third harmonic) non-negligible harmonic content, increasing partial voltage ripple magnitudes and shifting their phase (relative to the mains voltages). As a result, the third-harmonic-only assumption is no longer valid, and it is then nearly impossible to derive corresponding analytical expressions. Consequently, a numerical approach is used in this work to derive a generalized expression of normalized ripple energy as a function of the power factor, which can then easily be utilized for assessments of split DC link voltage behaviors for certain DC link capacitances and reference voltages. Simulations and experimental results validate the proposed methodology applied to a 10 kVA T-type converter prototype.

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“…Thus, the rectifier is required to operate continuously to keep a near unity power factor and eliminate all harmonics. This principle of operation is valid for single-phase or three-phase rectifiers [2]. The boost converter is the most widespread rectifier; still, it imposes a minimum DC bus voltage of ~375 V (to preserve continuous operation at the maximum amplitude of the sine wave).…”

Section: Introductionmentioning

confidence: 99%

Modeling, Simulation, and Experimental Validation of Broad Input Output Range Three Voltage Level Rectifier

Oren,

Dahan,

Shmaryahu

et al. 2024

Preprint

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A power factor correction (PFC) rectifier is compulsory for any electronic circuitry connected to the electrical grid. The majority of PFCs that are utilized are based on a step-up converter that supplies high DC voltage at its output terminal. Electric vehicle battery voltage varies from a few hundred to almost a thousand volts. Thus, an additional conversion step is obligatory when designing an all-brand universal charger. This paper presents a new type of front-end versatile step up / down three voltage level PFC. The rectifier can operate in continuous conduction mode or discontinuous conduction mode. First, the rectifier’s principle of operation is described, and then an innovative rectifier is analyzed for continuous and discontinuous conduction modes. Finally, the proposed theory is experimentally validated in a multiplier-less dual loop mode at discontinuous conduction modes. It was shown that although there is no multiplier use in the control circuitry, the power factor is near unity. It was revealed that the rectifier could swing the output voltage from 50 V to 900 V while the input voltage was 230 Vrms. The innovative topology suits any standard PFC rectifier, three-level voltage supplement, and dual-stage low-voltage power supply.

show abstract

On the Minimum Value of Split DC Link Capacitances in Three-Phase Three-Level Grid-Connected Converters Operating with Unity Power Factor with Limited Zero-Sequence Injection

Cited by 4 publications

References 37 publications

Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier

Modeling and Experimental Validation of Broad Input-Output Range Three-Voltage-Level Rectifier

Generalization of Split DC Link Voltages Behavior in Three-Phase-Level Converters Operating with Arbitrary Power Factor with Restricted Zero-Sequence Component

Modeling, Simulation, and Experimental Validation of Broad Input Output Range Three Voltage Level Rectifier

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