DC-Link Capacitor Current Modeling and Analysis for Three-Level Voltage Source Inverters

Zhao, Zhe; Diao, Fei; Wu, Yuheng; Wang, Zhongjing; Zhao, Yue

doi:10.1109/apec42165.2021.9487366

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…Following the removal of the fault, the S switches and VSC are reset to DVR mode functioning. The DC link capacitance (Cdc) is designed using equation ( 2) [14][15].…”

Section: A Design Methodsmentioning

confidence: 99%

Design and control of a dual-function device with simultaneous DVR and FCL capability

Asteraki¹,

Saradarzadeh²,

Pourfar³

2022

Scientia Iranica

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Dynamic voltage restorer (DVR) is a protecting device for sensitive loads which compensates grid voltage fluctuations. Although using fault current limiting devices (FCL) is a method of protecting loads and electrical networks against short circuits. In recent years, some methods have been proposed to combine these two devices to reduce the cost of converters and use the benefits of each device simultaneously. A new topology and control method to combine a DVR and an FCL is presented in this paper, which with just adding a switch to the conventional DVR, the FCL performance will be available for the network. The FCL-DVR has been developed to provide excellent dynamic performance and faster response time to network failures while maintaining appropriate reliability and a low converter cost. The performance ability of the proposed device is investigated by simulation results.

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“…Following the removal of the fault, the S switches and VSC are reset to DVR mode functioning. The DC link capacitance (Cdc) is designed using equation ( 2) [14][15].…”

Section: A Design Methodsmentioning

confidence: 99%

Design and control of a dual-function device with simultaneous DVR and FCL capability

Asteraki¹,

Saradarzadeh²,

Pourfar³

2022

Scientia Iranica

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“…The design tool in this paper derives the minimum DC-link capacitance values required during the converter design process. With the given system specifications and operating conditions, the DC-link capacitor currents of the 2L and 3L-NPC converters (i C of the 2L converter and i C1 /i C2 of the 3L-NPC converter in Figure 4) can be calculated analytically, as shown in ( 13) and ( 14), respectively [26,27]. Table 7 shows the detailed formulas for the parameters used in (14).…”

Section: Dc-link Voltage Current Ripple Calculationsmentioning

confidence: 99%

A Basic Design Tool for Grid-Connected AC–DC Converters Using Silcon Carbide MOSFETs

Kim,

Yun

2023

Electronics

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The design and optimization of power converters is a key factor in the growth and development of the power electronics field. However, the process of designing a power converter is not straightforward, and engineers often rely on experience and intuition, sometimes requiring time-consuming computer simulations. This paper presents a tool for the basic design of grid-connected AC–DC converters. The design tool takes specifications and operating conditions for two-level and three-level NPC converter topologies and derives a draft design. The tool calculates the input filter’s electrical parameters, the converter’s losses, the temperature rise of the power semiconductor devices, and the ripple current and voltage of the DC-link capacitor. In order to validate the proposed design tool, four AC–DC converters using SiC MOSFETs were designed. Based on the design results, simulation models and prototypes were fabricated to verify the performance and confirm that the proposed design tool can be used in the basic design process of converters.

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“…However, the ability of PWM methods to reduce NPP ripple varies based on power factor and modulation index. In [14], the authors analyse capacitor currents and state the analytical relationship between power factor, modulation index, and DC-link capacitor current. Jain et al [15] compare popular PWM methods in terms of their NPP ripple.…”

Section: Introductionmentioning

confidence: 99%

Capacitor sizing of three‐level neutral point clamped voltage source inverter for electric vehicles: Effects of modulation and motor characteristics

Ogan,

Bostanci

2024

IET Power Electronics

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A three‐level neutral point clamped (3L‐NPC) voltage source inverter (VSI) topology can be advantageous in electric vehicles with a high DC‐link voltage and a high switching frequency. A bulky DC‐link capacitor is not an option; thus, the DC‐link capacitor's sizing considering the traction system characteristics is an important design step. This paper investigates how the DC‐link capacitor size of a 3L‐NPC VSI gets affected by the combination of the interdependent characteristics of an electric drive, such as its power factor, modulation index, current, and fundamental frequency, with the effects of the modulation methods. Five pulse width modulation (PWM) methods, of which three of them have an active neutral point potential control, are compared in terms of their neutral point potential (NPP) oscillations. Then, the size of the DC‐link capacitor is determined for each PWM method so that the NPP ripple is kept under desired limits at all operating conditions. It is shown that both the modulation technique and the electric machine characteristics influence the capacitor size. For example, electric machine design modifications can introduce more than a 30% reduction in capacitor size. Finally, DC‐link and NPP oscillations with different PWM methods are experimentally validated in a scaled‐down 3L‐NPC inverter.

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DC-Link Capacitor Current Modeling and Analysis for Three-Level Voltage Source Inverters

Cited by 4 publications

References 15 publications

Design and control of a dual-function device with simultaneous DVR and FCL capability

Design and control of a dual-function device with simultaneous DVR and FCL capability

A Basic Design Tool for Grid-Connected AC–DC Converters Using Silcon Carbide MOSFETs

Capacitor sizing of three‐level neutral point clamped voltage source inverter for electric vehicles: Effects of modulation and motor characteristics

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