Power quality analyses of a large scale photovoltaic system

In a Grid-Connected Photovoltaic System (GCPS), the inverters are applied for integration with the power grid. This integration brings some issues at the connection point. Therefore, grid-tied inverter control performs a vital role in feeding the power system with good power quality. This study presents a current-controlled Voltage Source Inverter (VSI) strategy for large-scale GCPS generates 1000 kW rated of power. The methodology and structure of the control system are presented. The power quality issues such as harmonics, voltage fluctuation, voltage unbalance, and power factor are limited at the interfacing point into the required limits as imposed by the standards. This study also discusses the controller design and the simulation results are introduced to show its effectiveness. Furthermore, the values obtained may be used to evaluate the power supply quality of various inverter controllers.

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Nonlinear Control of Multilevel Inverter for Grid Connected Photovoltaic System with Power Quality Improvement

International Review of Electrical Engineering (IREE) ◽

10.15866/iree.v12i1.10685 ◽

2017 ◽

Vol 12 (1) ◽

pp. 43

Author(s):

Hamid Ouadi ◽

Mehdi Et-taoussi ◽

Abdellatif Bouhlal

Keyword(s):

Quality Improvement ◽

Nonlinear Control ◽

Power Quality ◽

Multilevel Inverter ◽

Photovoltaic System ◽

Power Quality Improvement

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Impact of Power Quality Issues in Grid Connected Photovoltaic System

2020 4th International Conference on Electronics, Communication and Aerospace Technology (ICECA) ◽

10.1109/iceca49313.2020.9297618 ◽

2020 ◽

Author(s):

B.N. Ch.V. Chakravarthi ◽

G.V. Siva Krishna Rao

Keyword(s):

Power Quality ◽

Photovoltaic System ◽

Quality Issues

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Reliability Analysis and Repair Activity for the Components of 350 kW Inverters in a Large Scale Grid-Connected Photovoltaic System

Electronics ◽

10.3390/electronics10050564 ◽

2021 ◽

Vol 10 (5) ◽

pp. 564

Author(s):

Filippo Spertino ◽

Angela Amato ◽

Gabriele Casali ◽

Alessandro Ciocia ◽

Gabriele Malgaroli

Keyword(s):

Reliability Analysis ◽

Large Scale ◽

Photovoltaic System ◽

Component Level ◽

Ac Power ◽

Repair Activity ◽

Industrial Maintenance ◽

Large Scale Grid ◽

Ac Converters ◽

Scale Grid

The reliability of photovoltaic (PV) generators is strongly affected by the performance of Direct Current/Alternating Current (DC/AC) converters, being the major source of PV underperformance. However, generally, their reliability is not investigated at component level: thus, the present work presents a reliability analysis and the repair activity for the components of full bridge DC/AC converters. In the first part of the paper, a reliability analysis using failure rates from literature is carried out for 132 inverters (AC rated power of 350 kW each) with global AC power of 46 MW in a large scale grid-connected PV plant. Then, in the second part of the work, results from literature are compared with data obtained by analyzing industrial maintenance reports in the years 2015–2017. In conclusion, the yearly energy losses involved in the downtime are quantified, as well as their availability.

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