Single-phase Z-Source inverter: Analysis and Low-frequency Harmonics Elimination Pulse Width Modulation

Yu, Yifan; Zhang, Qianfan; Liang, Bin; Cui, Shumei

doi:10.1109/ecce.2011.6064068

Cited by 52 publications

(25 citation statements)

References 19 publications

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“…Four basic CB-PWM control techniques, namely simple boost control [1], maximum boost control [2], maximum constant boost control [3], and modified SV-PWM methods [6,7] for three-phase ZSIs were compared in [8]. For single-phase ZSIs, most PWM controls use the simple boost control method [9][10][11][12][13][14][15][16]. In the simple boost control method, a constant voltage is compared to a high frequency triangle waveform to generate a fixed shoot-through control signal.…”

Section: Introductionmentioning

confidence: 99%

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Maximum Boost Control Method for Single-Phase Quasi-Switched-Boost and Quasi-Z-Source Inverters

Nguyen

Choi

2017

Energies

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Abstract:The maximum boost control method for a single-phase switched-boost inverter (SBI) and single-phase Z-source inverter (ZSI) is proposed in this paper. In the proposed method, the low frequency voltage is added to the constant voltage for generating the variable shoot-through time intervals. For improving the AC output quality of the inverter, an active power switch is used to replace one of the diodes in the single-phase SBI. The operating principles and circuit analysis using the proposed maximum boost control method for single-phase inverters are presented. Laboratory prototypes are built to verify the operation of the proposed pulse-width modulation (PWM) control method for both single-phase quasi-ZSI and single-phase quasi-SBI.

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Section: Introductionmentioning

confidence: 99%

“…Recently, some PWM strategies to reduce the ripples in the capacitor voltage and inductor current of ZSIs have been addressed in [11][12][13]18,19]. In [13], a low frequency (2ω) ripple is added to the constant shoot-through control waveform to suppress the double-frequency ripple in the capacitor in the single-phase ZSI topology.…”

Section: Introductionmentioning

confidence: 99%

Maximum Boost Control Method for Single-Phase Quasi-Switched-Boost and Quasi-Z-Source Inverters

Nguyen

Choi

2017

Energies

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“…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]. These 2ω ripples have to be minimized or at least restricted to an engineering tolerant range.…”

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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“…However, the added circuits increase the system cost and complexity. In [18], a low frequency harmonic elimination PWM technique is presented to minimize the DFR on Z-source capacitors. However, the method is used for application with constant voltage input source and DFR current is induced in the inductor and the input side.…”

Section: Introductionmentioning

confidence: 99%

A Grid Connected Three Phase PV Quasi-Z-Source Inverter with Double Frequency Ripple Suppression Control

Chalasani¹

2017

ijecs

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Abstract-In a Grid connected three-phase photovoltaic (PV) system, there is double-frequency power mismatch existed between the dc input and ac output. The double-frequency ripple (DFR) energy needs to be buffered by passive network. Otherwise, the ripple energy will flow into the input side and adversely affect the PV energy harvest. In a conventional PV system, electrolytic capacitors are usually used for this purpose due to their high capacitance. However, electrolytic capacitors are considered to be one of the most failure prone components in a PV inverter. In this project, a capacitance reduction control strategy is proposed to buffer the DFR energy in three-phase Z-source/quasi-Z-source inverter applications. Without using any extra hardware components, the proposed control strategy can significantly reduce the capacitance requirement and achieve low input voltage DFR. Consequently, highly reliable film capacitors can be used. The increased switching device voltage stress and power loss due to the proposed control strategy will also be discussed. The proposed system is simulated in MATLAB/Simulink platform.Index Terms-DC-link voltage balance, Zero voltage switching, Renewable Energy (RE).

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Single-phase Z-Source inverter: Analysis and Low-frequency Harmonics Elimination Pulse Width Modulation

Cited by 52 publications

References 19 publications

Maximum Boost Control Method for Single-Phase Quasi-Switched-Boost and Quasi-Z-Source Inverters

Maximum Boost Control Method for Single-Phase Quasi-Switched-Boost and Quasi-Z-Source Inverters

Quasi Impedance Source Inverter Based Active Filter for Flexible Grid Connection

A Grid Connected Three Phase PV Quasi-Z-Source Inverter with Double Frequency Ripple Suppression Control

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