A Symmetric Switched-Capacitor-Based Basic Inverter Unit for Grid-Connected PV Systems

Jahan, Hossein Khoun; Sarhangzadeh, Mitra; Ardashir, Jaber Fallah; Blaabjerg, Frede

doi:10.1109/tpel.2022.3184757

Cited by 9 publications

(4 citation statements)

References 23 publications

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“…during a switching interval. 29 In other words, the resonant frequency (f r ) of charging inductor and the capacitor should be lower than the switching frequency (f s ). 30 So, the charging inductor (L r ) can be calculated according to Equation (14).…”

Section: On Switches For Positive Half-cyclementioning

confidence: 99%

“…In this way, conduction losses are calculated for all states of voltage levels according to Equation (29), and their sum is considered total conduction losses. As a result, by calculating the parameters related to the converter losses, the converter's efficiency can be calculated through Equation (30).…”

Section: Conductive Lossesmentioning

confidence: 99%

“…The inductor ( L r ) in the proposed inverter is used to limit the inrush current of the capacitors and limit the power loss which arises from inrush current of capacitors. The size of this small charging inductor is calculated by taking into account the fact that the charging process of the capacitors should complete during a switching interval 29 . In other words, the resonant frequency ( f r ) of charging inductor and the capacitor should be lower than the switching frequency ( f s ) 30 .…”

Section: Operation Principles Of the Proposed Structurementioning

confidence: 99%

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A single‐source switched‐capacitor‐based 25‐level sextuple boost inverter with a low switch count

Noori,

Hosseinpour,

Seifi

et al. 2024

Energy Science & Engineering

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Today, multilevel inverters are widely utilized in various applications. Reducing the number of components in the design of these converters is one of the crucial goals so that they have less volume and cost. This paper presents a single‐source structure for a multilevel switched‐capacitor inverter with voltage boost capability. The proposed structure can generate 25 sinusoidal‐like step voltage levels with a six times amplitude increase compared to the input. This converter uses only one direct current (DC) power source, 14 switches, and four capacitors. The nearest level control switching method has been used to control the converter, create voltage levels, and select the switching modes. A comprehensive comparison has been made with other recently presented structures to demonstrate the efficiency of the proposed structure. The advantages of the proposed structure include using only one DC voltage source, the ability to increase the output voltage six times compared to the input, the use of fewer power electronics components compared to the number of voltage levels, proper efficiency, self‐balancing of capacitors, and as a result, the lower cost. The performance accuracy of the proposed converter has been simulated in the MATLAB Simulink environment and then evaluated by a laboratory prototype.

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Section: On Switches For Positive Half-cyclementioning

confidence: 99%

Section: Conductive Lossesmentioning

confidence: 99%

Section: Operation Principles Of the Proposed Structurementioning

confidence: 99%

See 1 more Smart Citation

A single‐source switched‐capacitor‐based 25‐level sextuple boost inverter with a low switch count

Noori,

Hosseinpour,

Seifi

et al. 2024

Energy Science & Engineering

View full text Add to dashboard Cite

show abstract

“…The PV module will generate maximum output if it is optimally controlled. The number of optimizing techniques such as Hill climbing perturb & observe, fuzzy logic controller (FLC), etc [10,11]. can be applied to track the maximum output from the PV module [3].…”

Section: Introductionmentioning

confidence: 99%

A novel control technique for various modes of grid-connected PV system to improve power quality.

Tiwari

Agarwal

2023

Preprint

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A novel control strategy for a single grid-connected PV system with power backup in different modes of operation, including constant load, changing atmospheric circumstances, and load variable conditions. The proposed controller works with a large nonlinear load under different modes of operation. The controller operates in such a way that, it can achieve different functions such as maintaining power flow between the photovoltaic (PV) module to the grid, maintaining UPF (unity power factor) at the point of common coupling(reactive power compensation), synchronizing a grid with PV (grid current harmonics compensation) and regulates the operation of battery(charging or discharging) for electric vehicle application. Implementing the proposed controller reduces the complexity of the active shunt filter at the point of common coupling (PCC). A maximum Power Point (MPPT) controller, optimized with perturb & observe (P&O)algorithm is used to get optimum power from the PV module. Thesimulation findings validate the operation of the suggested controlstrategy in a grid-connected PV system with a battery backup topology.

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A Comprehensive Review of Grid-Connected PV Systems Based on Impedance Source Inverter

et al. 2022

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The increase in linking photovoltaic (PV) power plants to utility grids are due to the world expansion in PV systems and its advantages of low running cost, renewable, etc. Although PV is now considered one of the main power sources in many countries, it has low efficiency. Therefore, the big issue to improve the efficiency is to enhance the interface inverters' efficiency. Different inverter topologies have been proposed to relate to the PV panels; each has advantages and disadvantages. These topologies can be classified into two-stage and single-stage (impedance network) inverters. Impedance network inverters overcome the problems of traditional inverters and seek to realize the advantages of a two-stage system and reduce the number of power conversions. However, to the authors' best knowledge, there is no comprehensive review of the applications of the impedance source inverter for the PV system, including the control techniques. Therefore, this paper reviewed the existing topologies by paying attention to four key research issues: 1) various impedance network inverters and discusses the main structures from the point of view of the PV application, 2) control techniques suitable for impedance source inverters, comparing them in terms of complexity and theoretical performance, 3) investigation into the most important control methods used to connect the inverter output current with the network voltage, and 4) Challenges and future direction. Finally, this paper is provided as a brief reference to help researchers choose the appropriate impedance source inverter topologies for their applications and the preferred control and modulation methods for this type.

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A Symmetric Switched-Capacitor-Based Basic Inverter Unit for Grid-Connected PV Systems

Cited by 9 publications

References 23 publications

A single‐source switched‐capacitor‐based 25‐level sextuple boost inverter with a low switch count

A single‐source switched‐capacitor‐based 25‐level sextuple boost inverter with a low switch count

A novel control technique for various modes of grid-connected PV system to improve power quality.

A Comprehensive Review of Grid-Connected PV Systems Based on Impedance Source Inverter

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