Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter

Park, Jong-Hyoung; Kim, Heung-Geun; Nho, Eui‐Cheol; Chun, Tae-Won

doi:10.6113/jpe.2010.10.1.079

Cited by 48 publications

(18 citation statements)

References 10 publications

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“…The boost ability of the proposed embedded switched-inductor Z-source inverters is higher than that of the classic Z-source inverter [2]. From (12), (13), (18) and (19), we can observe that the proposed inverter topologies are symmetrical when V dc1 = V dc2 = V dc /2. In case two split dc voltage sources V dc /2 are not identical, there is no problem at the operation of proposed topologies.…”

Section: B Cesl-zsi Circuit Analysismentioning

confidence: 93%

“…Work on Z-source inverters has focused on pulse-width modulation (PWM) strategies [3], [4], applications [5], [6], modeling and control [7], [8], direct ac-ac converters [9], [10], and other Z-network topologies [11]- [13]. A class of quasi-Z-source inverters was proposed in [11], [12] that were designed to overcome the shortcomings of the classic Z-source inverter. Quasi-Z-source inverters have some advantages, such as a reduction in the passive component ratings and an improvement in the input profiles.…”

Section: Introductionmentioning

confidence: 99%

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Embedded Switched-Inductor Z-Source Inverters

Nguyen¹,

Lim²,

Chang³

et al. 2013

Journal of Power Electronics

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In this paper, a ripple input current embedded switched-inductor Z-source inverter (rESL-ZSI) and a continuous input current embedded switched-inductor Z-source inverter (cESL-ZSI) are proposed by inserting two dc sources into the switched-inductor cells. The proposed inverters provide a high boost voltage inversion ability, a lower voltage stress across the active switching devices, a continuous input current and a reduced voltage stress on the capacitors. In addition, they can suppress the startup inrush current, which otherwise might destroy the devices. This paper presents the operating principles, analysis, and simulation results, and compares them to the conventional switched-inductor Z-source inverter. In order to verify the performance of the proposed converters, a laboratory prototype was constructed with 60 V dc input to test both configurations.

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Section: B Cesl-zsi Circuit Analysismentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Embedded Switched-Inductor Z-Source Inverters

Nguyen¹,

Lim²,

Chang³

et al. 2013

Journal of Power Electronics

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“…Because the shoot-through state is allowed in PWM, the reliability of the ZSI system is significantly increased and the ac output distortion is greatly reduced. Owing to these advantages, the ZSI topology is developed continuously and utilized successfully in various applications such as motor drives, fuel cell, PV, and wind power systems [5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

A New Z-Source Inverter Topology with High Voltage Boost Ability

Trinh¹,

Lee²

2012

Journal of Electrical Engineering and Technology

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-A new Z-source inverter (ZSI) topology is developed to improve voltage boost ability.The proposed topology is modified from the switched inductor topology by adding some more inductors and diodes into inductor branch to the conventional Z-source network. The modulation methods developed for the conventional ZSI can be easily utilized in the proposed ZSI. The proposed ZSI has an ability to obtain a higher voltage boost ratio compared with the conventional ZSI under the same shoot-through duty ratio. Since a smaller shoot-through duty ratio is required for high voltage boost, the proposed ZSI is able to reduce the voltage stress on Z-source capacitor and inverter-bridge. Theoretical analysis and operating principle of the proposed topology are explicitly described. In addition, the design guideline of the proposed Z-source network as well as the PWM control method to achieve the desired voltage boost factor is also analyzed in detail. The improved performances are validated by both simulation and experiment.

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“…This approach enables maximum power point tracking (MPPT) control with poststage inverter current information instead of calculating the solar array power, which significantly simplifies the controller and the sensor. A power conversion circuit for a grid-connected PV system using a Quasi-ZSI was suggested and analyzed in [33]. A modified perturbation and observation (P&O) method was used for the MPPT control.…”

Section: Introductionmentioning

confidence: 99%

Unified MPPT Control Strategy for Z-Source Inverter Based Photovoltaic Power Conversion Systems

Thangaprakash¹

2012

Journal of Power Electronics

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Z-source inverters (ZSI) are used to realize both DC voltage boost and DC-AC inversion in single stage with a reduced number of power switching devices. A traditional MPPT control algorithm provides a shoot-through interval which should be inserted in the switching waveforms of the inverter to output the maximum power to the Z-network. At this instant, the voltage across the Z-source capacitor is equal to the output voltage of a PV array at the maximum power point (MPP). The control of the Z-source capacitor voltage beyond the MPP voltage of a PV array is not facilitated in traditional MPPT algorithms. This paper presents a unified MPPT control algorithm to simultaneously achieve MPPT as well as Z-source capacitor voltage control. Development and implementation of the proposed algorithm and a comparison with traditional results are discussed. The effectiveness of the proposed unified MPPT control strategy is implemented in Matlab/Simulink software and verified by experimental results.

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Power Conditioning System for a Grid Connected PV Power Generation Using a Quasi-Z-Source Inverter

Cited by 48 publications

References 10 publications

Embedded Switched-Inductor Z-Source Inverters

Embedded Switched-Inductor Z-Source Inverters

A New Z-Source Inverter Topology with High Voltage Boost Ability

Unified MPPT Control Strategy for Z-Source Inverter Based Photovoltaic Power Conversion Systems

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