An Effective Control Method for Quasi-Z-Source Cascade Multilevel Inverter-Based Grid-Tie Single-Phase Photovoltaic Power System

The electricity shortage can be effectively alleviated by developing household photovoltaic power system in vast rural areas, it is necessary to establish simulation models. In this paper, the dynamic modeling of household photovoltaic power system including photovoltaic,Cuk-chopper circuit,battery and a single phase PWM inverter have been made in the ElectroMagnetic Transient Program /Alternative Transient Program(EMTP/ATP) software package.Control strategy based on MPPT for the power control of the inverter have been also developed. Operation characteristic of household photovoltaic power system was developed. Simulation results proved the validity of the model.

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Hybrid pulsewidth modulated single-phase quasi-Z-source grid-tie Photovoltaic power system

2015 IEEE Applied Power Electronics Conference and Exposition (APEC) ◽

10.1109/apec.2015.7104585 ◽

2015 ◽

Cited By ~ 2

Author(s):

Yushan Liu ◽

Haitham Abu-Rub ◽

Baoming Ge

Keyword(s):

Power System ◽

Single Phase ◽

Photovoltaic Power

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The Review of Photovoltaic Power System and Chaos Phenomenon

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.308-310.193 ◽

2011 ◽

Vol 308-310 ◽

pp. 193-196

Author(s):

Xue Song Zhou ◽

Jin Li ◽

You Jie Ma

Keyword(s):

Power System ◽

Feedback Linearization ◽

Control Method ◽

Photovoltaic Power ◽

Operation Process ◽

Tracking Controller ◽

Oscillation Problem ◽

Grid Operation

This article introduces the composition and classification of Photovoltaic power system, makes Photovoltaic Grid Power System as an example, and Research the problem that is met in the grid operation process—Chaos Oscillation. For Chaos Oscillation problem in the Photovoltaic Grid Power System, paper elaborates conventional control method on Chaos, comes up with the theory that is applied to control method in Chaos Oscillation using Feedback Linearization to design a tracking controller to make Chaos Oscillation disappear in Photovoltaic Grid Power System.

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Performance evaluation and comparison of diode clamped multilevel inverter and hybrid inverter based on PD and APOD modulation techniques

International Journal of Advances in Applied Sciences ◽

10.11591/ijaas.v8.i2.pp143-153 ◽

2019 ◽

Vol 8 (2) ◽

pp. 143

Author(s):

N. Susheela ◽

P. Satish Kumar

Keyword(s):

Pulse Width ◽

Single Phase ◽

Pulse Width Modulation ◽

Control Method ◽

Harmonic Distortion ◽

Multilevel Inverter ◽

Multilevel Inverters ◽

Number Of Components ◽

Modulation Techniques ◽

Modulation Methods

<p>The popularity of multilevel inverters have increasing over the years in various applications without use of a transformer and has many benefits. This work presents the performance and comparative analysis of single phase diode clamped multilevel inverter and a hybrid inverter with reduced number of components. As there are some drawbacks of diode clamped multilevel inverter such as requiring higher number of components, PWM control method is complex and capacitor voltage balancing problem, an implementation of hybrid inverter that requires fewer components and less carrier signals when compared to conventional multilevel inverters is discussed. The performance of single phase diode clamped multilevel inverter and hybrid multilevel inverter for seven, nine and eleven levels is performed using phase disposition, alternate phase opposition disposition sinusoidal pulse width modulation techniques. Both the multilevel inverter are implemented for the above mentioned multicarrier based Pulse Width Modulation methods for R and R-L loads. The total harmonic distortion is evaluated at various modulation indices. The analysis of the multilevel inverters is done by simulation in matlab / simulink environment.</p>

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Optimized Modeling and Control Strategy of the Single-Phase Photovoltaic Grid-Connected Cascaded H-bridge Multilevel Inverter

Electronics ◽

10.3390/electronics7090207 ◽

2018 ◽

Vol 7 (9) ◽

pp. 207 ◽

Cited By ~ 4

Author(s):

Seongjun Lee ◽

Jonghoon Kim

Keyword(s):

Single Phase ◽

Control Method ◽

Maximum Power ◽

Multilevel Inverter ◽

Duty Ratio ◽

Control Loop ◽

Partial Shading ◽

Modeling And Control ◽

Photovoltaic Array ◽

And Control

This paper presents the modeling and control-loop design method with an inverted decoupling scheme of a single-phase photovoltaic grid-connected five-level cascaded H-bridge multilevel inverter. For the unity power factor, the proportional and integral current controller with a duty ratio feed-forward compensation is used. In addition, in order to achieve the maximum power point tracking of each photovoltaic array, when the stacked modules are in the partial shading condition, each direct current (DC) voltage is stably controlled to their maximum power points (MPP) by dedicated voltage controllers of each H-bridge module. This paper also presents a control method that minimizes the effect of the loop-interaction in the design of an individual DC-link voltage control loop in a two-input two-output system. The proposed control methods of the cascaded H-bridge multilevel inverter are validated through the simulation and experimental results of the 2-kW prototype hardware.

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