Transformer less 1Φ Inverter for Grid-Connected PV Systems with an Optimized Control

This paper investigates the transformerless single-phase inverter incorporates with the photovoltaic system along with the support of grid voltage. Solar Energy is a Non-Conventional Energy source which is mandatory for power generation due to their immeasurable parade and green pleasant nature. One-cycle control (OCC), Ruggedness and consistency which makes the interfacing with the grid easily. For grid interfacing, the inverter circuit does not need phase locked loop facility and are gradually being working for such solicitations. The strategy of the OCC inverter of one stage for solar PV applications is supported by means of a Sinusoidal Pulse Width Modulation to enhance inverter enactment at both low and high insolation levels. These factors allows the plan of a MPPT along P&O controller that pointedly progresses inverter playacting. Though, the OCC-based structures testified previous sensing of the grid voltage which slightly equalizers the strength of its characteristics, In order to dazed the restriction of prior researches, an One Cycle Control based grid-connected one-stage PV system is suggested. The sustainability of the suggested scheme is inveterate by performance simulation justification.

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Preliminary Evaluation of a Rooftop Grid-Connected Photovoltaic System Installation under the Climatic Conditions of Texas (USA)

Energies ◽

10.3390/en14030586 ◽

2021 ◽

Vol 14 (3) ◽

pp. 586

Author(s):

Fadhil Y. Al-Aboosi ◽

Abdullah F. Al-Aboosi

Keyword(s):

Power Plants ◽

Negative Impact ◽

Photovoltaic System ◽

Performance Ratio ◽

Energy Output ◽

Preliminary Evaluation ◽

Solar Pv ◽

Energy Potential ◽

Pv System ◽

Pv Systems

Solar photovoltaic (PV) systems have demonstrated growing competitiveness as a viable alternative to fossil fuel-based power plants to mitigate the negative impact of fossil energy sources on the environment. Notwithstanding, solar PV technology has not made yet a meaningful contribution in most countries globally. This study aims to encourage the adoption of solar PV systems on rooftop buildings in countries which have a good solar energy potential, and even if they are oil or gas producers, based on the obtained results of a proposed PV system. The performance of a rooftop grid-tied 3360 kWp PV system was analyzed by considering technical, economic, and environmental criteria, solar irradiance intensity, two modes of single-axis tracking, shadow effect, PV cell temperature impact on system efficiency, and Texas A&M University as a case study. The evaluated parameters of the proposed system include energy output, array yield, final yield, array and system losses, capacity factor, performance ratio, return on investment, payback period, Levelized cost of energy, and carbon emission. According to the overall performance results of the proposed PV system, it is found to be a technically, economically, and environmentally feasible solution for electricity generation and would play a significant role in the future energy mix of Texas.

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Multicarrier-SPWM Based Novel 7-Level Inverter Topology with Photovoltaic System

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v8.i2.pp826-834 ◽

2017 ◽

Vol 8 (2) ◽

pp. 826

Author(s):

R. Palanisamy ◽

V. Sinmayee ◽

K. Selvakumar ◽

K. Vijayakumar

Keyword(s):

Pulse Width Modulation ◽

Harmonic Distortion ◽

Multilevel Inverter ◽

Photovoltaic System ◽

Pv System ◽

Switching Losses ◽

Common Mode Voltage ◽

Voltage Stress ◽

Inverter Topology ◽

Sinusoidal Pulse Width Modulation

<p>In this paper a novel 5 switch seven level DC-AC inverter is being proposed. The proposed multilevel inverter uses reduced number of switches as compared to the switches used in the conventional multilevel inverter. The inverter has been designed to generate a 7 level AC output using 5 switches. The voltage stress on each of the switches as well as the switching losses is found to be less, minimized common mode voltage (CMV) level and reduced total harmonic distortion. The proposed 7-level inverter topology has four dc sources, which is energized through the PV system. Proposed inverter is controlled with help of multicarrier sinusoidal pulse width modulation (MCSPWM).The simulation and hardware results were verified using matlab simulink and dspic microcontroller respectively.</p>

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A Modular Multilevel Converter with an Advanced PWM Control Technique for Grid-Tied Photovoltaic System

Energies ◽

10.3390/en14020331 ◽

2021 ◽

Vol 14 (2) ◽

pp. 331

Author(s):

Safa Haq ◽

Shuvra Prokash Biswas ◽

Md. Kamal Hosain ◽

Md. Ashib Rahman ◽

Md. Rabiul Islam ◽

...

Keyword(s):

Power Quality ◽

Fossil Fuels ◽

Pulse Width Modulation ◽

Harmonic Distortion ◽

Photovoltaic System ◽

Control Technique ◽

Solar Pv ◽

Pv System ◽

Medium Voltage ◽

Modulation Technique

Due to global warming and shortage of fossil fuels, the grid-connected solar photovoltaic (PV) system has gained significant popularity all over the world. The modular multilevel cascaded (MMC) inverter is the natural choice for step-up transformer and line filter less direct medium voltage grid integration of solar PV systems. However, power quality and loss are the important issues while connecting the PV system to the medium voltage grid through MMC inverter. Modulation technique is the key to maintain output power quality, e.g., total harmonic distortion (THD) and to ensure low switching and conduction losses. In this paper, an advanced modulation technique named “triangle saturated common mode pulse width modulation (TSCMPWM)” control is proposed for a 3-phase 5-level MMC inverter-based grid-tied PV system. Compared to traditional modulation techniques, the proposed TSCMPWM control offers the lowest voltage THD as well as lower inverter power losses. Performance of the proposed modulation technique is evaluated in MATLAB/Simulink environment and tested with a reduced scale prototype test platform. Both simulation and experimental results show the effectiveness of the proposed modulation technique.

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Design of type-1 servo controller for grid voltage modulated direct-power control of single-phase grid-connected PV inverter

International Journal of Electrical and Computer Engineering (IJECE) ◽

10.11591/ijece.v11i3.pp1912-1923 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1912

Author(s):

Eyad Radwan ◽

Mutasim Nour ◽

Ali Baniyounes ◽

Khalid S. Al Olimat

Keyword(s):

Single Phase ◽

Pulse Width Modulation ◽

Reactive Power ◽

Multiple Input Multiple Output ◽

Photovoltaic System ◽

Pole Placement ◽

Grid Voltage ◽

Wide Range ◽

Single Phase Inverter

This paper presents direct control of active and reactive power using grid voltage modulation for single-phase grid-connected photovoltaic inverter. A design of type-1 servo system based on pole-placement method is proposed to control the power flow using a simplified multiple-input multiple-output (MIMO) model of the system. Phase-locked loop (PLL) with a quarter cycle time delay is used to estimate the grid phase angle for the purpose of performing the stationary and synchronous reference frame transformation. Unipolar pulse width modulation (PWM) technique is used to control a single-phase inverter with 2.7 KVA capacity connected to the photovoltaic system. The proposed controller can simply be tuned using minimum number of controller gains to achieve the transient and steady-state performance requirements. The proposed system, was capable of operating for a wide range of solar irradiance levels with a power factor in the range of 0.95 (leading/lagging), for the reactive power compensation purposes.

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MSPWM Based Implementation of Novel 5-level Inverter with Photovoltaic System

International Journal of Power Electronics and Drive Systems (IJPEDS) ◽

10.11591/ijpeds.v8.i4.pp1494-1502 ◽

2017 ◽

Vol 8 (4) ◽

pp. 1494

Author(s):

Palanisamy R ◽

K. Vijayakumar ◽

D. Selvabharathi

Keyword(s):

Output Voltage ◽

Pulse Width Modulation ◽

Harmonic Distortion ◽

Input Voltage ◽

Photovoltaic System ◽

Pv System ◽

Power Semiconductor ◽

Semiconductor Switches ◽

Common Mode Voltage ◽

Sinusoidal Pulse Width Modulation

This paper proposes a novel 5-level dc-ac converter circuit using with 6 power semiconductor switches. The proposed multilevel inverter generates five-level ac output voltage by implementing Multi-carrier sinusoidal pulse width modulation (MSPWM) technique with reduced number of switches. The voltage stress on each switching devices and common mode voltage can be minimized from the suggested system. The designed system gives better controlled output current and improved output voltage with diminished total Harmonic Distortion value. The operating principles of the proposed inverter are discussed. DC Input for the proposed system is obtained from PV System. Finally, an experimental prototype of the proposed system with 12-V input voltage and 20 V /5 W output is implemented along with simulation output of the waveform to the load. The efficiency and the reduction of harmonic content are discussed.

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Grid Connected Solar PV System with SEPIC Converter Compared with Parallel Boost Converter Based MPPT

International Journal of Photoenergy ◽

10.1155/2014/385720 ◽

2014 ◽

Vol 2014 ◽

pp. 1-12 ◽

Cited By ~ 2

Author(s):

T. Ajith Bosco Raj ◽

R. Ramesh ◽

J. R. Maglin ◽

M. Vaigundamoorthi ◽

I. William Christopher ◽

...

Keyword(s):

Pulse Width Modulation ◽

High Reliability ◽

Boost Converter ◽

Maximum Power ◽

Photovoltaic System ◽

Switching Frequency ◽

Solar Pv ◽

Pv System ◽

Switching Losses ◽

Series Resistor

The main objective of this work is to study the behaviour of the solar PV systems and model the efficient Grid-connected solar power system. The DC-DC MPPT circuit using chaotic pulse width modulation has been designed to track maximum power from solar PV module. The conversion efficiency of the proposed MPPT system is increased when CPWM is used as a control scheme. This paper also proposes a simplified multilevel (seven level) inverter for a grid-connected photovoltaic system. The primary goal of these systems is to increase the energy injected to the grid by keeping track of the maximum power point of the panel, by reducing the switching frequency, and by providing high reliability. The maximum power has been tracked experimentally. It is compared with parallel boost converter. Also this model is based on mathematical equations and is described through an equivalent circuit including a PV source with MPPT, a diode, a series resistor, a shunt resistor, and dual boost converter with active snubber circuit. This model can extract PV power and boost by using dual boost converter with active snubber. By using this method the overall system efficiency is improved thereby reducing the switching losses and cost.

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Experimental Study on the Effect of Dust Deposition on a Car Park Photovoltaic System with Different Cleaning Cycles

Sustainability ◽

10.3390/su13147636 ◽

2021 ◽

Vol 13 (14) ◽

pp. 7636

Author(s):

Khaled M. Alawasa ◽

Rashid S. AlAbri ◽

Amer S. Al-Hinai ◽

Mohammed H. Albadi ◽

Abdullah H. Al-Badi

Keyword(s):

Negative Impact ◽

Photovoltaic System ◽

Energy Yield ◽

Solar Pv ◽

Dust Deposition ◽

Pv System ◽

Pv Systems ◽

Car Park ◽

The Impact ◽

Dust Accumulation

For a decade, investments in solar photovoltaic (PV) systems have been increasing exponentially in the Middle East. Broadly speaking, these investments have been facing tremendous challenges due to the harsh weather in this particular part of the world. Dust accumulation is one the challenges that negatively affects the performance of solar PV systems. The overall goal of this paper is to thoroughly investigate the effect of dust accumulation on the energy yield of car park PV systems. With this aim in mind, the paper presents scientific values for further research and opens the horizon for attracting further investments in solar PV systems. This study is based on a real PV system in the Sultanate of Oman and considers different cleaning cycles for 16 months (from 29 July 2018 to 10 November 2019). Furthermore, four different PV groups were assessed, and the system was monitored under different cleaning frequencies. In general, it was found that dust accumulation has a significant impact; under 29-day, 32-day, 72-day, and 98-day cleaning cycles, the average percentages of energy loss due to soiling were 9.5%, 18.2%, 31.13%, and 45.6%, respectively. In addition, the dust effect has a seasonal variation. The study revealed that dust accumulation has a more negative impact during summer than during winter. During summer, the energy losses due to soiling were 8.7% higher than those during winter. The difference was attributed to different environmental conditions, with high humidity and low wind speed being the main factors that worsen the impact of dust during summer. Based on the findings of this research, a monthly cleaning program is highly recommended in the city of Muscat.

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Reconfigurable Distributed Power Electronics Technique for Solar PV Systems

Electronics ◽

10.3390/electronics10091121 ◽

2021 ◽

Vol 10 (9) ◽

pp. 1121

Author(s):

Kamran Ali Khan Niazi ◽

Yongheng Yang ◽

Tamas Kerekes ◽

Dezso Sera

Keyword(s):

Energy Yield ◽

Solar Pv ◽

Charge Redistribution ◽

Pv System ◽

Partial Shading ◽

Pv Systems ◽

Simulation Based ◽

In Series ◽

A Cell ◽

Power Balancing

A reconfiguration technique using a switched-capacitor (SC)-based voltage equalizer differential power processing (DPP) concept is proposed in this paper for photovoltaic (PV) systems at a cell/subpanel/panel-level. The proposed active diffusion charge redistribution (ADCR) architecture increases the energy yield during mismatch and adds a voltage boosting capability to the PV system under no mismatch by connected the available PV cells/panels in series. The technique performs a reconfiguration by measuring the PV cell/panel voltages and their irradiances. The power balancing is achieved by charge redistribution through SC under mismatch conditions, e.g., partial shading. Moreover, PV cells/panels remain in series under no mismatch. Overall, this paper analyzes, simulates, and evaluates the effectiveness of the proposed DPP architecture through a simulation-based model prepared in PSIM. Additionally, the effectiveness is also demonstrated by comparing it with existing conventional DPP and traditional bypass diode architecture.

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