Multiple-Input Soft-Switching DC–DC Converter to Connect Renewable Energy Sources in a DC Microgrid

Sun, Zhuoya; Bae, Sungwoo

doi:10.1109/access.2022.3227439

Cited by 7 publications

(4 citation statements)

References 29 publications

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“…The overall transfer function of the system, derived by reducing the block diagram in Fig. 5 and substituting the parameter values from Table III, is obtained as (3). The values of the proportional and integral gains of the current controller, K 9 and K 10 , respectively, are obtained by tuning the controller.…”

Section: Fuel Cell With Boost Convertermentioning

confidence: 99%

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Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm

Jithin,

Mayadevi,

Hari Kumar

et al. 2024

Journal of Modern Power Systems and Clean Energy

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DC microgrids (DCMGs) are made up of a network of sources and loads that are connected by a number of power electronic converters (PECs). The increase in the number of these PECs instigates major concerns in system stability. While interconnecting the microgrids to form a cluster, the system stability must be ensured. This paper proposes a novel stepby-step system matrix building (SMB) algorithm to update the system matrix of an existing DCMG cluster when a new microgrid is added to the cluster through a distribution line. The stability of the individual DCMGs and the DCMG cluster is analyzed using the eigenvalue method. Further, the particle swarm optimization (PSO) algorithm is used to retune the controller gains if the newly formed cluster is not stable. The simulation of the DCMG cluster is carried out in MATLAB/Simulink environment to test the proposed algorithm. The results are also validated using the OP4510 real-time simulator (RTS).

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Section: Fuel Cell With Boost Convertermentioning

confidence: 99%

“…The power electronic converters (PECs) interface the majority of the sources and loads of a DCMG to a shared DC bus. Therefore, it is possible to characterize power flow, stability, power quality, etc, as a function of converter behavior and their control loops [3], [4].…”

Section: Introductionmentioning

confidence: 99%

Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm

Jithin,

Mayadevi,

Hari Kumar

et al. 2024

Journal of Modern Power Systems and Clean Energy

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“…On the other hand, some fundamental elements of renewable power generation systems (RPGS) are the power converters [31,32], which must present very high reliability. One of the most vulnerable components of power converters is the aluminum electrolytic capacitor (AEC), which is responsible for more than 25% of their failures [11,14].…”

Section: Non-invasive Fault-detection Techniquementioning

confidence: 99%

Advanced Fault-Detection Technique for DC-Link Aluminum Electrolytic Capacitors Based on a Random Forest Classifier

2023

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In recent years, significant technological advances have emerged in renewable power generation systems (RPGS), making them more economical and competitive. On the other hand, for the RPGS to achieve the highest level of performance possible, it is important to ensure the healthy operation of their main building blocks. Power electronic converters (PEC), which are one of the main building blocks of RPGS, have some vulnerable components, such as capacitors, which are responsible for more than a quarter of the failures in these converters. Therefore, it is of paramount importance that the design of fault diagnosis techniques (FDT) assess the capacitor’s state of health so that it is possible to implement predictive and preventive maintenance plans in order to reduce unexpected stoppage of these systems. One of the most commonly used capacitors in power converters is the aluminum electrolytic capacitor (AEC) whose aging manifests itself through an increase in its equivalent series resistance (ESR). Several advanced intelligent techniques have been proposed for assessing AEC health status, many of which require the use of a current sensor in the capacitor branch. However, the introduction of a current sensor in the capacitor branch imposes practical restrictions; in addition, it introduces unwanted resistive and inductive effects. This paper presents an FDT based on the random forest classifier (RFC), which triggers an alert mechanism when the DC-link AEC reaches its ESR threshold value. The great advantage of the proposed solution is that it is non-invasive; therefore, it is not necessary to introduce any sensor inside the converter. The validation of the proposed FDT will be carried out using several computer simulations carried out in Matlab/Simulink.

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“…To address this challenge, power electronics-based DC/DC converters play a crucial role [4][5][6][7][8]. They enhance the voltage output, making it easier to integrate renewable energy into different applications.…”

Section: Introductionmentioning

confidence: 99%

Advancing Renewable Energy: An Experimental Study of a Switched-Inductor, Switched-Capacitor Luo Boost Converter for Low-Voltage Applications

Ertekin,

Baltacı,

Çelebi

2023

Electronics

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Photovoltaic (PV), battery, and fuel cell (FC) technologies are emerging forms of renewable energy gaining popularity. However, one of the key limitations is their production of direct current (DC) voltage, which hinders the connectivity and integration with the electrical grid. To address this issue, various DC/DC boost converters have been introduced. This study presents an innovative Luo converter with a switched-inductor–capacitor (SLC) cell at the input and a switched-capacitor (SC) cell at the output. The SLC cell not only increases the input voltage, but also enhances the source’s lifespan and reliability. The SC cell further amplifies the voltage, especially for high-gain applications. The proposed converter simplifies control processes by using a single power switch, significantly boosting the input voltage by 21 times with a duty ratio of 0.8. This surpasses the gains achieved by conventional boost converters by over fourfold and Luo converters by sevenfold. The second challenge when a converter is connected to these voltage sources is the potential reduction in the lifespan of the sources and the overall system due to large input current ripples. The proposed converter addresses this issue by incorporating a switched-capacitor cell on the input side. This cell charges the inductors in parallel and discharges them in series, reducing the magnitude of the input current. Another advantage of the proposed converter is its simplicity, as it employs only one power switch, minimizing the complexity of the controller system. Additionally, the distribution of the output voltage passing through the diodes between the switch and output capacitor helps mitigate voltage stress for all semiconductor devices and capacitors. The study includes thorough mathematical analyses, simulations, and laboratory tests to validate the research’s theoretical foundations.

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Multiple-Input Soft-Switching DC–DC Converter to Connect Renewable Energy Sources in a DC Microgrid

Cited by 7 publications

References 29 publications

Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm

Stability Analysis of DC Microgrid Clusters Based on Step-by-step System Matrix Building Algorithm

Advanced Fault-Detection Technique for DC-Link Aluminum Electrolytic Capacitors Based on a Random Forest Classifier

Advancing Renewable Energy: An Experimental Study of a Switched-Inductor, Switched-Capacitor Luo Boost Converter for Low-Voltage Applications

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