An Energy Stored Quasi-Z-Source Cascade Multilevel Inverter-Based Photovoltaic Power Generation System

Sun, Dehui; Ge, Baoming; Liang, Weihua; Abu‐Rub, Haitham; Peng, Fang Zheng

doi:10.1109/tie.2015.2407853

Cited by 145 publications

(68 citation statements)

References 19 publications

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“…The former consists of three-phase QZS H-bridge inverter module focused by [5], the latter integrates battery into QZS network to store abundant Photo Voltaic power and smooth its fluctuation in three-phase system described by [6]. When the battery-integrated QZS network is applied to three-phase QZSI module, the energy stored QZS-CMI has advantages of both QZS-CMI and energy stored system described by [7], also the energy stored single-phase QZSI possesses promising application in PV power systems. However, similar to traditional single-phase inverter, the second harmonic (2ω) pulsating power flows through the dc side of three-phase QZSI module, the QZS capacitors and inductors, which causes 2ω voltage ripple of dc-link of capacitors, and 2ω current ripple of inductors described by [8].…”

Section: Review Of the Related Workmentioning

confidence: 99%

Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection

Madasamy¹

2017

IJRASET

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The main objective of this paper is to suppress harmonic and unbalanced reactive power to ensure the reliable operation of grid at the same time of grid-connection. Active filter (AF) has become the conventional technique of harmonic suppression, and the control method applied in the photovoltaic grid-connected system. The paper proposes an active filter integrated quasi Z source inverter applied in photovoltaic systems better, a flexible grid connection method based on direct power control. The main function of the proposed grid-connected photovoltaic generation system is supplying active power to grid, while that of AF device is harmonic suppression and reactive power compensation. The proposed method adopted grid power to control active filter directly, thus the detection of harmonics and reactive current of loads is omitted. The effectiveness of the proposed method proved through .simulation with MATLAB. Keywords: Active filter, Flexible grid-connection, quasi Z source inverter, second order pulsating harmonics I. INTRODUCTIONRenewable resources are the alternative resources for conventional energy resources and are in great demand nowadays. The traditional resources are reducing across the world rapidly. Solar photo voltaic generating electrical power from the alternative resources. Many research efforts are made to extract maximum power out of the Photo voltaic panel by using different power converters as most of the power generated by the renewable sources are varying. There are different traditional power circuit topological which has many disadvantages. The conventional Voltage Source Inverters and DC/DC converters have certain disadvantages such as double stage conversion, maximum output voltage obtained is less than the dc voltage, complexity in the controller circuits and the inverter components should be over sized to match with the continuous variation of Photo voltaic voltages which can be overcome by the proposed control topology of quasi impedance source inverter. The pv system is connected by implementation of the quasi impedance source inverter in which the output voltage can be controlled by both modulation index and the boost factor independently based on the open loop and closed loop simulation. This advantage makes Photo voltaic generation more efficient. Since the quasi impedance source inverter has the advantage of having no dead time. To operate in one of the mode named shoot through mode either the same leg switches(upper leg and lower leg) are short switches ON so that short circuit occurs whereas in order to avoid the short circuit of the same leg as designed in the form of traditional VSI methods we are forced to make the dead time . The comparative analysis between impedance source and the quasi impedance source inverter were done to find out the best topology for the Photo Voltaic system. A traditional energy storage system usually requires an extra bidirectional dc-dc converter , which increases the system cost, volume, and control complication. Hence, an energy storage...

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Section: Review Of the Related Workmentioning

confidence: 99%

Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection

Madasamy¹

2017

IJRASET

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“…Then, the DC link voltage is pulsating in nature between zero and peak DC link voltage. Moreover, a qZS-CHB topology for grid-tie PV systems was proposed in [9][10][11][12][13][14]. This mix-topology is characterized by highquality staircase output voltage with lower harmonic distortions, independent DC-link voltage compensation with a special voltage step-up/down function in a single-stage power conversion, and independent control of power delivery with high reliability [13].…”

Section: Finite Control Set Model Predictive Control For Gridtied Quamentioning

confidence: 99%

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Trabelsi

Bayhan

Abu‐Rub

et al. 2016

2016 IEEE International Conference on Industrial Technology (ICIT)

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“…To improve on the original ZSI, the quasi-Z-source inverter (q-ZSI) has been developed which features several improvements, such as continuous input current and no need input capacitance. It has no disadvantages when compared to the traditional ZSI, and can be used in any application in which the ZSI would be used [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Stator Current Harmonic Reduction in a Novel Half Quasi-Z-Source Wind Power Generation System

Huang

Zhang

2016

Energies

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Abstract:The generator stator current gets distorted with unacceptable levels of total harmonic distortion (THD) because impedance-source wind power generation systems use three-phase diode rectifiers. The stator current harmonics will cause increasing losses and torque ripple, which reduce the efficiency and stability of the system. This paper proposes a novel half quasi-Z-source inverter (H-qZSI) for grid-connected wind power generation systems, which can reduce the generator stator current harmonics a great deal. When H-qZSI operates in the shoot-through zero state, the derivative of the generator stator current is only determined by the instantaneous value of the generator stator voltage, so the nonlinear relationship between generator stator current and stator voltage is improved compared with the traditional impedance-source inverter. Theoretically, it is indicated that the stator current harmonics can be reduced effectively by means of the proposed H-qZSI. Finally, simulation and experimental results are given to verify the theoretical analysis.

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An Energy Stored Quasi-Z-Source Cascade Multilevel Inverter-Based Photovoltaic Power Generation System

Cited by 145 publications

References 19 publications

Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection

Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection

Finite control set model predictive control for grid-tied quasi-Z-source based multilevel inverter

Stator Current Harmonic Reduction in a Novel Half Quasi-Z-Source Wind Power Generation System

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