A Reconfigurable Solar Photovoltaic Grid-Tied Inverter Architecture for Enhanced Energy Access in Backup Power Applications

Venkatramanan, D.

doi:10.1109/tie.2019.2960742

Cited by 27 publications

(8 citation statements)

References 27 publications

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“…The current source in the model is the current of the non-active phase, ic1, whil ∆VC is the voltage ripple. The RMS value of the ripple is given through Equation (11):…”

Section: Capacitor Current and Voltage Ripplesmentioning

confidence: 99%

“…The more traditional grid-connected inverters fed all the available energy into the grid, while more advanced ones use batteries to accumulate excess energy at off-peak hours [10]. Some topologies have been proposed to feed critical loads during times of blackout [11]. Others solutions have been proved to be able to compensate for current harmonics [12].…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of the B4 Topology for Implementing Grid-Connected Inverters in Microgrids

Torán,

Liberos,

Patrao

et al. 2024

Electronics

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The B4 topology is an interesting alternative to the conventional B6 inverter due to its reduced number of parts and lower cost. Although it has been widely used in the past, especially in low-power motor drive applications, its application as a grid-connected inverter is an open area of research. In this regard, this paper analyses the feasibility of the B4 inverter topology for grid-connected applications. A versatile 7 kW inverter prototype, which may be configured as B4 and B6, was built, allowing for a comprehensive evaluation of the performance of both topologies. Through an analytical study and experimental tests, the performance of the B4 and B6 topologies was comparatively evaluated in terms of efficiency, total harmonic distortion of line currents, current unbalance, cost, and mean time between failures. The study was carried out in the context of microgrid systems, highlighting their role in the integration of renewable energy and distributed generation.

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“…The current source in the model is the current of the non-active phase, ic1, whil ∆VC is the voltage ripple. The RMS value of the ripple is given through Equation (11):…”

Section: Capacitor Current and Voltage Ripplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of the B4 Topology for Implementing Grid-Connected Inverters in Microgrids

Torán,

Liberos,

Patrao

et al. 2024

Electronics

View full text Add to dashboard Cite

show abstract

“…where, P dc is the constant component and p r (t) is the ripple component, variable at second-harmonic frequency. Assuming a stiff dc bus voltage V dc , the second-harmonic ripple current in the dc-link due to p r (t) is calculated in (1), where…”

Section: A Ripple Power In Single-phase Convertersmentioning

confidence: 99%

“…Single-phase power converters find wide applications in different power conversion systems ranging from power levels of a few watts to several mega-watts. Starting from a home appliance like UPS, micro-inverter for roof-top solar inverter [1], battery charger for electric vehicles to Mega-watt level front-end converter in railway traction system [2], singlephase voltage source converters (VSC) are adopted at large. Despite its widespread applications, standardised design, and control practices [3], proficient handling of second-harmonic ripple remains a challenge in single-phase VSCs, especially in applications demanding high power density, reliable operation, and prolonged life [4].…”

Section: Introductionmentioning

confidence: 99%

Solid-State Tuning Restorer for Second-Harmonic LC Filter in Single-Phase Converters

Mukhopadhyay¹

2023

Preprint

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<p>Second-harmonic filter is a critical constituent of single-phase power conversion system that helps to reduce the dc bus capacitance requirement. As the converter performance largely depends on the filter efficacy, an improved filter design target, characterised by superior ripple attenuation, compact size, low power loss, and less failure rate, continued to trigger significant research interest. Given the design and performance trade-offs between conventional passive filters and cutting-edge active filters, hybrid filters have emerged as an attractive solution capable of combining the desired features. Though it is easy for new designs to adapt an active filter with tunable characteristics, more often than not, it is impracticable for an existing system due to constraints on accessibility and space. However, tuning, retrofitting or replacement of the existing passive filters can be necessary in the interest of superior filtering and converter performance. Therefore, an easily integrable active circuit, named solid state tuning restorer (SSTR), is proposed here to enhance the performance of an existing LC filter. The second-harmonic tuned passive LC filter, along with SSTR, forms a hybrid filter with adjustable characteristics capable of maintaining the tuned state over a range of operating frequencies and LC parameters. The volt-ampere (VA) rating of SSTR, being only 2% of the main converter, facilitates easy integration into an existing dc bus LC filter. Even in case of SSTR failure, the configuration offers a graceful degradation in the second-harmonic filter characteristics without disrupting the main converter. Thus, it improves the performance of an existing second-harmonic LC filter while not compromising its reliability. The operation, design constraints, and control methodology of the proposed SSTR are discussed, and the performance is validated through experiments on a hardware prototype.</p>

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“…In modern days, uninterruptible power supply (UPS) systems are usually used at the utility grid as the main power source and the batteries are used as a backup power source [12,13]. Thus, for systems interfacing the ESS with the DC bus, the bidirectional DC-DC converters with power flow control have been widely discussed for effective power conversion [14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of the Bidirectional DC-DC Converter with Rapid Energy Conversion

et al. 2022

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The bidirectional DC-DC converters are widely used in the energy storage system (ESS) and DC distribution system. The power capacity is limited when the converter is operated with smooth power transfer. In addition, the directions of the inductor current and the capacitor voltage cannot change instantaneously. In this study, a rapid energy conversion technique for smoothing and accelerating the energy transfer under the same specification of the main components in steady state is proposed. Moreover, a bidirectional DC-DC converter with a high conversion ratio is proposed to overcome the commonly low voltage input from renewable energy sources. The operating principles of the proposed converter’s step-down and step-up modes are discussed in this study. Furthermore, to achieve rapid energy conversion, digital control is a crucial component in the converter system. A digital signal processor is used as the control platform, and a control strategy is formulated to achieve rapid energy conversion. The bidirectional DC-DC prototype converter with a 24 V battery, a DC bus of 200 V, and an output power of 500 W is constructed to confirm the feasibility of rapid energy conversion. The proposed converter can be operated in CCM, BCM, and DCM conditions. The transfer period can be completed within one switching cycle when the proposed converter is operated in BCM or DCM. The energy is freewheeled before energy conversion when the proposed converter is operated in CCM condition. In the experiment, the minimum transfer period is 6.29 µs on the DCM stage.

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A Reconfigurable Solar Photovoltaic Grid-Tied Inverter Architecture for Enhanced Energy Access in Backup Power Applications

Cited by 27 publications

References 27 publications

Performance Evaluation of the B4 Topology for Implementing Grid-Connected Inverters in Microgrids

Performance Evaluation of the B4 Topology for Implementing Grid-Connected Inverters in Microgrids

Solid-State Tuning Restorer for Second-Harmonic LC Filter in Single-Phase Converters

Design and Implementation of the Bidirectional DC-DC Converter with Rapid Energy Conversion

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