An Efficient Grid-Connected Three-Phase Single-Stage Boost Current Source Inverter

Singh, Akanksha; Mirafzal, Behrooz

doi:10.1109/jpets.2019.2929952

Cited by 41 publications

(10 citation statements)

References 27 publications

(39 reference statements)

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“…It supports the elimination of the DC-DC converter and step-up transformer stages in DC-AC applications wherein the DC voltage is lower than the output AC peak voltage [27]. This is predominantly the case with fuel cells and PV applications [28]. For the latter, voltage boosting lays the foundation for a single-stage transformerless PV-CSI system [29,30].…”

Section: Introductionmentioning

confidence: 75%

A Novel Single-Phase Five-Level Current-Source Inverter Topology

Aldin,

Dagan

2024

Electronics

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Recent technological advances have renewed the research interest in current-source inverters (CSIs). Nonetheless, CSI research still falls behind its voltage-source counterpart with regards to topologies, modulation, and control. Acknowledging the above, this paper presents a novel single-phase five-level CSI topology. The proposed circuit utilises eight switches and two inductors for the generation of five distinct output levels while maintaining low output voltage THD and dv/dt. Furthermore, by offsetting the inductor currents from a binary 1:2 to a trinary 1:3 ratio, the proposed inverter can generate seven current levels at its output. The inverter offers built-in short-circuit protection and can boost a low input DC voltage to a higher peak AC output voltage. These merits, alongside an electrolytic-capacitor-free design, simple current balancing mechanism, and fault-tolerant characteristics, make it a promising candidate for PV module-integrated inverter (MII) systems. The current topology utilises two inductors but is fully functional with single-inductor operation. The paper provides a functional analysis of the inverter topology alongside the inverter switching states and corresponding conduction paths. A detailed analysis of the inductor current dynamics as well as a current-balancing algorithm for dual- and single-inductor operations are given. The theoretical analysis of the proposed circuit and its functional operation are verified using simulations and experimental results carried out on a laboratory prototype.

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Section: Introductionmentioning

confidence: 75%

A Novel Single-Phase Five-Level Current-Source Inverter Topology

Aldin,

Dagan

2024

Electronics

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“…Moreover, the DC‐link electrolytic capacitors are substituted by small DC‐link inductors. As shown in A. Singh et al, 3 this will, inherently, increase the reliability and the lifespan of the power conversion topology. These features make of the CSI topology an interesting alternative for grid‐connected PV applications.…”

Section: Introductionmentioning

confidence: 94%

Performance evaluation of a grid‐connected three‐phase six‐switch boost‐type current source PV inverter under different switching strategies

Ezzeddine

Hamouda

Belaïd

et al. 2021

Int Trans Electr Energ Syst

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Recently, boost‐type current source inverters (CSIs) have received a considerable attention in grid connected photovoltaic (PV) applications thanks to their salient features such as high reliability and the aptitude to operate with a DC‐link voltage lower than the grid side voltage. This paper investigates the performance of three different switching strategies for grid‐connected six‐switch boost‐type CSI employed in a solar power conversion system. These strategies are analyzed in terms of the global average conduction and switching power losses, DC‐link current ripple, and AC power quality. The proposed evaluation is based on experimental investigations of the power devices behavior and computer co‐simulations. The obtained numerical and experimental results prove that the switching strategy with a freewheeling state placed in the middle of the overall pulse‐period is the most appropriate in terms of efficiency and power quality.

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“…Several applications of three-phase CSI in photovoltaic systems are proposed in [10,14,16]. Analysis and modelling of a grid connected CSI, using PI control in the synchronous frame and carrier-based SPWM, are presented in [10].…”

Section: Literature Review: Three-phase Current Source Inverter Systemmentioning

confidence: 99%

“…Although a simple MPPT control structure is introduced, limited experimental results and information on the control system are presented [14]. Meanwhile in [16,17], reverse-blocking IGBTs with Phasor Pulse Width Modulation are used in three-phase CSI which enable higher system efficiency, higher boost ratio and elimination of stepup stages by means of boost converter or step up transformer. This work is verified using hardware prototype of 2kW, 208Vl-I, rms and varying dc input voltage between 60V to 120Vdc.…”

Section: Literature Review: Three-phase Current Source Inverter Systemmentioning

confidence: 99%

Current control of grid connected three phase current source inverter based on medium power renewable energy system

Azmi¹,

Adam²,

Rahim³

et al. 2021

IJATEE

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Current source inverter (CSI) features simple converter structure and inherent voltage boost capability. In addition, it provides low instantaneous rate of voltage change with respect to time in comparison to voltage source inverter (VSI) and multilevel inverter (MLI). Nonetheless, CSI does not outshine as grid interfacing unit in photovoltaic (PV) generation system. This is because of requirement of large sizing of dc-link inductor and sluggish performance during light load condition. Contemplating both advantages and disadvantages of CSI, this work is aimed to investigate and analyze the superiority of CSI in PV system. The proposed system employs direct regular-sampled pulse width modulation (DRSPWM) as modulator and multi-loop proportional-integral (PI) in synchronous frame as the controller. The gridconnected CSI system is further evaluated along with photovoltaic maximum power point tracking (PV-MPPT) control.Simulation verification highlighted that the option of using CSI as medium power PV grid integration unit in exchanging active-reactive power with grid network is very satisfactory. In addition, balanced sinusoidal output currents with acceptable harmonic limit are successfully achieved; like other topologies in PV grid integration. The proposed CSI system is proved to be able to track the references in event of varying input condition from PV array. The theoretical equations and modeling are described, and the simulation are conducted in MATLAB / Simulink platform.

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An Efficient Grid-Connected Three-Phase Single-Stage Boost Current Source Inverter

Cited by 41 publications

References 27 publications

A Novel Single-Phase Five-Level Current-Source Inverter Topology

A Novel Single-Phase Five-Level Current-Source Inverter Topology

Performance evaluation of a grid‐connected three‐phase six‐switch boost‐type current source PV inverter under different switching strategies

Current control of grid connected three phase current source inverter based on medium power renewable energy system

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