scholarly journals Lightning Surge Analysis on a Large Scale Grid-Connected Solar Photovoltaic System

Energies ◽  
2017 ◽  
Vol 10 (12) ◽  
pp. 2149 ◽  
Author(s):  
Nur Zaini ◽  
Mohd Zainal Abidin Ab. Kadir ◽  
Mohd Amran Mohd Radzi ◽  
Mahdi Izadi ◽  
Norhafiz Azis ◽  
...  
Keyword(s):  
Large Scale ◽  
Photovoltaic System ◽  
Solar Photovoltaic ◽  
Large Scale Grid ◽  
Solar Photovoltaic System ◽  
Scale Grid

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

Electronics ◽  
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.

Sizing Optimization of Large-Scale Grid-Connected Photovoltaic System Using Cuckoo Search

2017 ◽  
Vol 8 (1) ◽  
pp. 169 ◽  
Author(s):  
Muhammad Zakyizzuddin Bin Rosselan ◽  
Shahril Irwan Sulaiman ◽  
Ismail Musirin
Keyword(s):  
Large Scale ◽  
Computation Time ◽  
Cuckoo Search ◽  
Optimization Methods ◽  
Photovoltaic System ◽  
Performance Ratio ◽  
Sizing Optimization ◽  
Optimal Sizing ◽  
Large Scale Grid ◽  
Scale Grid

<p>This study presents the development of Cuckoo Search (CS)-based sizing algorithm for sizing optimization of 5MW large-scale Grid-Connected Photovoltaic (GCPV) systems. CS was used to select the optimal combination of the system components which are PV module and inverter such that the Performance Ratio (PR) is correspondingly optimized. The oversized and undersized of this large-scale GCPV system can give huge impact towards the performanceof this system. Before incorporating the optimization methods, a sizing algorithm for large-scale GCPV systems was developed. Later, an Iterative-based Sizing Algorithm (ISA) was developed to determine the optimal sizing solution which was later used as benchmark for sizing algorithms using optimization methods.The results showed that the CS-based sizing algorithm was unable to found the optimal PR for the system if compared with ISA. However, CS was outperformed ISA in producing the lowest computation time in finding the optimal sizing solution.</p>

scholarly journals Application of large-scale grid-connected solar photovoltaic system for voltage stability improvement of weak national grids

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Bukola Babatunde Adetokun ◽  
Joseph Olorunfemi Ojo ◽  
Christopher Maina Muriithi
Keyword(s):  
Power System ◽  
Energy Demand ◽  
Large Scale ◽  
Voltage Stability ◽  
Reactive Power ◽  
Active Power ◽  
Photovoltaic System ◽  
Critical Voltage ◽  
Solar Photovoltaic ◽  
Solar Photovoltaic System

AbstractThis paper investigates the application of large-scale solar photovoltaic (SPV) system for voltage stability improvement of weak national grids. Large-scale SPV integration has been investigated on the Nigerian power system to enhance voltage stability and as a viable alternative to the aged shunt reactors currently being used in the Nigerian national grid to mitigate overvoltage issues in Northern Nigeria. Two scenarios of increasing SPV penetration level (PL) are investigated in this work, namely, centralized large-scale SPV at the critical bus and dispersed large-scale SPV across the weak buses. The voltage stability of the system is evaluated using the active power margin (APM) also called megawatt margin (MWM) derived from Active Power–Voltage (P–V) analysis, the reactive power margin (RPM) and the associated critical voltage–reactive power ratio (CVQR) index obtained from Reactive Power–Voltage (Q–V) analysis. All simulations are carried out in DIgSILENT PowerFactory software and result analyses done with MATLAB. The results show that with centralized SPV generation for the case study system, the highest bus voltage is able to fall within acceptable limits at 26.29% (1000 MW), while the dispersed SPV achieves this at 21.44% (800 MW). Also, the dispersed SPV scenario provides better voltage stability improvement for the system as indicated by the MWM, RPM and the CVQR index of the system. Therefore, this work provides a baseline insight on the potential application of large-scale SPV in weak grids such as the Nigerian case to address the voltage stability problems in the power system while utilizing the abundant solar resource to meet the increasing energy demand.

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