Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Revathi, B. Sri; Prabhakar, M.

doi:10.1109/access.2022.3199701

Cited by 20 publications

(7 citation statements)

References 49 publications

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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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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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“…Two main factors affect conversion systems' efficiency and power density: the choice of multilevel topology and the power semiconductors technology [15], [16]. Concerning the selection of the converter topology, size and weight of the system, its cost, energy efficiency, thermal efficiency, complexity, and electromagnetic interference are all factors a designer should consider to achieve an optimal design [17], [18].…”

Section: B Requirementsmentioning

confidence: 99%

Design of SiC-Si Hybrid Interleaved 3-Phase 5-Level E-Type Back-to-Back Converter

di Benedetto,

Lidozzi,

Grbović

2023

IEEE Open J. Power Electron.

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In modern applications, such as variable frequency electric drives, aircraft propulsion, electric vehicles, and uninterruptible power supply units, high power-dense, and efficient AC-AC power converters are the key to reducing power losses, thus limiting the overall costs, and improving the system's reliability. Power electronic equipment can be enhanced thanks to the continuous evolution of conversion topologies and advancements in power semiconductor technology. The design and the optimization strategy of the AC-AC 5-Level converter, called Interleaved 3-Phase 5-Level E-Type Back-to-Back Converter (I-3Φ5L BTB E-Type Converter), has been proposed in this paper. The converter is analyzed and experimentally characterized to prove the configuration's high efficiency and high-power density. An introduction to the characteristics of the I-3Φ5L BTB E-Type Converter is described, and afterward, the optimization methodology to design the multilevel converter is presented. The converter prototype is illustrated, which achieves a peak efficiency of 98.2% and a total weight of 6.18 kg using hybrid technology for power semiconductors..

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“…Generally, photovoltaic (PV) panels yield low voltage at its output and need significant voltage transformation for connecting the load and other fruitful utilization purposes. An intermediate power electronic converter is generally adopted to boost the output from the PV panel 3 , 4 .…”

Section: Introductionmentioning

confidence: 99%

Non-isolated high gain DC–DC converter with ripple-free source current

Valarmathy,

Prabhakar

2024

Sci Rep

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In this paper, an interleaved DC–DC converter with high voltage gain capability is presented. The proposed converter is synthesized from a coupled-inductor (CI) based interleaved boost converter (IBC). For enhancing the voltage gain capability, voltage-lift capacitor, and diode-capacitor multiplier (DCM) cells are employed at the primary and secondary sides of the CIs. The proposed hybrid gain extension concept is practically validated using simulation and experimentation. A 185W prototype version of the proposed converter is switched at 50 kHz under laboratory conditions from a 18 V input to realize 380 V at the output port. The switches in the proposed converter operate at 0.5 duty ratio and experience a very low voltage stress of only 10.5% of the output voltage. Moreover, due to the interleaving mechanism, the input current ripple is just 11% of the total input current and the current rating of the switches is halved. Due to the adopted gain extension mechanism, the voltage stress on almost all the diodes is also significantly reduced. The swift dynamic response of the converter under closed-loop conditions is also practically demonstrated. Further, the beneficial features of the proposed converter are clearly validated by benchmarking its parameters with many state-of-the art converters which are available in literature.

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Solar PV Fed DC Microgrid: Applications, Converter Selection, Design and Testing

Cited by 20 publications

References 49 publications

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

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

Design of SiC-Si Hybrid Interleaved 3-Phase 5-Level E-Type Back-to-Back Converter

Non-isolated high gain DC–DC converter with ripple-free source current

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