A Three-Phase Three-Level Isolated DC–AC Converter With Line Frequency Unfolding

Pal, Anirban; Basu, Kaushik

doi:10.1109/tpel.2020.2984698

Cited by 12 publications

(8 citation statements)

References 23 publications

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“…Inverter's output workings like a simulated power system with a fixed frequency and voltage [16]. The PV-asynchronous generator and batteries, as well as the PV-asynchronous generator, supply the threephase charges to the main converter [17].…”

Section: With Dc-dc Converter Proposed Photovoltaic Inverter-fed Wind...mentioning

confidence: 99%

Self-excited asynchronous generator with PV array in detained autonomous generation systems

Nagarajan

David

2023

IJPEDS

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<span lang="EN-US">It's important to examine and handle the issue of green energy generation in inaccessible locations. Nonrenewable hybrid power has environmental and economic impacts. Reliable electricity and energy efficiency are priorities. Renewable energy that is eco-friendly and doesn't affect the environment. Solar and wind power, two ecologically benign and load-sharing-capable forms of renewable energy, are included in this technique. At the same time, solar power will keep the load voltage balanced and the system stable thanks to the inclusion of a DC-DC converter. The asynchronous generator has been selected because of its low maintenance needs and extended service life; nevertheless, the voltage on the load side is unbalanced when this machine is in operation. An asynchronous generator can be a viable alternative to well-developed synchronous generators for use in wind turbines or small hydro generators because they have relatively inexpensive costs, are simple, require inadequate maintenance, possess adequate resistance to wear and tear, and have reduced overload damage. It is difficult to maintain a continuous supply of energy in faraway regions because of the lack of related work in the power distribution networks. This problem is addressed in this paper by a well-designed converter that maintains a constant output voltage.</span>

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Section: With Dc-dc Converter Proposed Photovoltaic Inverter-fed Wind...mentioning

confidence: 99%

Self-excited asynchronous generator with PV array in detained autonomous generation systems

Nagarajan

David

2023

IJPEDS

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“…The 3LNPC inverters with soft-switching systems, presented in the literature over the last 10 years, have the highest efficiency in the range from 92.0% to 98.3% [11,12,15,16]; however, the rated powers of these systems are from 2 to 20 kW and their structures significantly vary with respect to the proposed solution. Therefore, it is difficult to compare the efficiency of the described solution with other soft-switching systems, especially because the parameters of the switches used today, e.g., voltage drops and switching times, are more favourable than a few years ago.…”

Section: Power Losses Analysismentioning

confidence: 99%

“…In systems described in [10,[13][14][15][16], capacitors are connected in parallel to main switches. Note that in some low-rated power inverters, parasitic capacitances of a given switch are used, but this refers to soft-switching systems with MOSFETs [11][12][13]. In case of disturbances, a given switch may be turned ON when the capacitor is not discharged; it can cause damage of the inverter.…”

Section: Power Losses Analysismentioning

confidence: 99%

“…In case of disturbances, a given switch may be turned ON when the capacitor is not discharged; it can cause damage of the inverter. Disturbances in the inverter operation may cause an uncontrolled turn-OFF of main switches which are connected in series with transformer windings [10] or with a resistance-inductive load [11,12]. Additionally, due to different disturbances, an uncontrolled turn-OFF of auxiliary switches, which are connected in series with inductors, may occur.…”

Section: Power Losses Analysismentioning

confidence: 99%

“…The second group of soft-switching systems includes solutions that support the switching processes individually in each phase of the given three-level inverter [7][8][9][10][11][12]. An advantage of these solutions is the ability to support switching processes in a wide range of output frequencies, especially when the inverter should operate with different methods of pulse width modulation.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

2021

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This paper presents a new soft-switching solution recommended for three-level neutral-point-clamped inverters. The operation principles of the proposed solution, working stages, selection of elements, and the control algorithm are comprehensively discussed herein. The control method of the inverter main switches is the same as that of the switches of an inverter operating according to the hard-switching technique. The correctness of the proposed solution was confirmed by the results of different tests using a laboratory neutral-point-clamped inverter with rated parameters of 3 kW, 2 × 150 V, 12 A, and 3 kHz. Numerical analyses were performed for the inverter of rated power 1.2 MW. The switching losses of the inverter operating with the proposed solution were compared with those of an inverter with hard-switching method. The proposed soft-switching solution increased the inverter efficiency and its competitiveness in relation to other proposals because there were no connections between switches and capacitors or inductors, which pose a risk of damaging the inverter when disturbances in the control system appear.

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A novel HRMO-AOA approach for a grid integrated wind-solar PV system with a 5-level NPC inverter

Pardhu,

Kota

2024

Results in Engineering

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A Three-Phase Three-Level Isolated DC–AC Converter With Line Frequency Unfolding

Cited by 12 publications

References 23 publications

Self-excited asynchronous generator with PV array in detained autonomous generation systems

Self-excited asynchronous generator with PV array in detained autonomous generation systems

A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

A novel HRMO-AOA approach for a grid integrated wind-solar PV system with a 5-level NPC inverter

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