Stability Analysis of Identical Paralleled DC-DC Converters with Average Current Sharing

Cheng, Pengming; Ding, Guo Bao; Song, Chao; Chai, Handong.; Guo-ying, XU

doi:10.1109/apeec.2019.8720726

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…15, which serves as a means to explain the adverse attributes of the System. [22][23][24] Figure 11, depicts the block diagram illustrating the closed loop control system of the converter H(s) including a proportional-integral-derivative (PID) controller. The converter H(s) is a second-order hold (SOH) that utilizes a sampling interval T in order to replicate the behavior of the system.…”

Section: Representation Of Impedance Spectroscopymentioning

confidence: 99%

Analysis of Lithium-ion Batteries through Electrochemical Impedance Spectroscopy Modeling

Teki,

Kasi,

Chidurala

et al. 2024

J. Electrochem. Soc.

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Electrochemical impedance spectroscopy (EIS) is a very effective methodology employed in the evaluation of performance and degradation mechanisms associated with lithium-ion batteries. In order to comprehend the complex electrochemical processes taking place within these energy storage devices, reliable and effective diagnostic tools are required due to the constant improvements in battery technology. EIS methodology has gained prominence as a very effective non-destructive method for examining the electrochemical characteristics of batteries. This technique offers significant contributions by providing useful insights into the internal operations of batteries. The main objective of this study is to create an electrical equivalent circuit model of a lithium-ion battery based on physics, and then use EIS to comprehend the electrical behavior and impedance of the battery to evaluate its performance under various operating scenarios. We seek to identify the critical elements influencing the battery’s capacity, performance, and lifespan by capturing the intricate interaction of EIS. The results of this research are going to enhance the understanding of battery behavior and supporting the design as a more reliable and efficient energy storage systems for a wide range of applications, from portable electronic devices to electric vehicles and renewable energy integration.

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Section: Representation Of Impedance Spectroscopymentioning

confidence: 99%

Analysis of Lithium-ion Batteries through Electrochemical Impedance Spectroscopy Modeling

Teki,

Kasi,

Chidurala

et al. 2024

J. Electrochem. Soc.

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“…To address the problems associated with PCCs, the following solution strategies have been proposed: (i) centralized control strategies to endorse balanced power sharing and a reduction in ICCs [20,34]; (ii) decentralized strategies consisting of droop controllers that do not require a central communication block [23,35]; and (iii) physical components-assisted methodologies to stabilize equivalent power sharing and improve efficiency [11,36]. To integrate various DC sources with the AC grid, an architecture composed of PCCs is proposed in [35].…”

Section: Literature Reviewmentioning

confidence: 99%

“…To enhance the efficiency and reliability of the power-conditioning phase in FC-based HP applications, an appropriate distribution of processed power among parallel-coupled converters (PCCs) is a viable solution. A considerable reduction in power losses can be achieved alongside noticeable improvements in conditioning efficiency [17,20]. The equivalent sharing of conditioned power between PCCs can also reduce the thermal throttling of the components.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Reliable Power-Conditioning Stage for Fuel Cell-Based High-Power Applications

Iqbal

Benmouna

Claude³

et al. 2023

Energies

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Mainstream power-conditioning devices such as boost converters are frequently utilized for developing a compatible interface between a fuel cell, electrical storage, and high power loads. The conventional power stage comprising a unique boost converter suffers from low efficiency and poor reliability due to excessive power losses, particularly in high-power applications. Additionally, the presence of high ripple contents can reduce the lifespan of the fuel cell itself. With this background, this paper proposes and experimentally validates a physical components-assisted equivalent power-sharing strategy between parallel-coupled boost converters (PCCs) that is subjected to a wide spectrum of low-voltage–high-power conditions. The operation of PCCs is bottlenecked by several practical limitations, such as the presence of inner circulating currents (ICCs) and stability issues associated with the equivalent sharing of power. To overcome these limitations, a module of reverse blocking diodes is suggested to avoid ICCs between the PCCs. Further, an equalization filter is properly placed to improve the equivalent power-sharing capability. The proposed strategy is theoretically assessed in a MATLAB/Simulink environment with a 6 kW proton exchange membrane fuel cell (PEMFC) as the main power source. A scaled-down laboratory setup consisting of an 810 W PEMFC stack, an electronic load, three boost converters, and a filter circuit is then designed and critically evaluated. A consistent agreement is observed between the experimental findings and the simulation results under realistic operating conditions.

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“…It should also be noticed that the required current-sharing control in the parallel inverters system might reduce the system's stability [31], so that the additional current-sharing control also needs to be considered in modelling. Although the droop control method is usually used to achieve current and power balance among the inverter modules [18,32,33], its dynamic performance is poor because of the quite low bandwidth of droop control [18].…”

Section: The General Time-domain Model Of N-parallel Inverters Systemmentioning

confidence: 99%

A Floquet theory‐based fast time‐domain stability analysis forN‐parallel inverters system

Hong

Jiang

Liu

et al. 2021

IET Power Electronics

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Based on Floquet theory, a simple and fast time-domain stability analysis method for an N-parallel inverters system is proposed. Furthermore, a general time-domain model of the N-parallel inverters system in grid-connected mode and in island mode are derived, and the corresponding stability criteria are derived based on the Floquet theory. Subsequently, simulations and experiments of a two-parallel inverters system in island and grid-connected modes are conducted to verify the correctness and effectiveness of the proposed timedomain stability analysis method. To the end, the complexity comparison between the proposed time-domain method and the traditional frequency-domain method is presented to prove the advantages of the proposed method over the tedious manual derivation.

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Stability Analysis of Identical Paralleled DC-DC Converters with Average Current Sharing

Cited by 6 publications

References 8 publications

Analysis of Lithium-ion Batteries through Electrochemical Impedance Spectroscopy Modeling

Analysis of Lithium-ion Batteries through Electrochemical Impedance Spectroscopy Modeling

Efficient and Reliable Power-Conditioning Stage for Fuel Cell-Based High-Power Applications

A Floquet theory‐based fast time‐domain stability analysis forN‐parallel inverters system

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