Improvement Approach for Matching PV-array and Inverter of Grid Connected PV Systems Verified by a Case Study

Omar, Moien A.; Mahmoud, Marwan M.

doi:10.14710/ijred.2021.36082

Cited by 10 publications

(7 citation statements)

References 23 publications

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“…In a series connection, the voltage output will increase according to the module number, while in a parallel connection, the current output will rise according to the module number. Therefore, to determine the series-parallel connection of the PV modules, (4), (5), and (6) are used [11], [12]. 𝑉 min_𝑖𝑛𝑣𝑒𝑟𝑡𝑒𝑟 is the minimum input voltage of the inverter, 𝑉 max_𝑖𝑛𝑣𝑒𝑟𝑡𝑒𝑟 is the maximum input voltage of inverter, 𝑉 𝑜𝑐_𝑚𝑜𝑑𝑢𝑙𝑒 is open circuit voltage of PV module, 𝑉 𝑚𝑝_𝑚𝑜𝑑𝑢𝑙𝑒 is the voltage at maximum power point of PV module, 𝐼 max_𝑖𝑛𝑣𝑒𝑟𝑡𝑒𝑟_𝑖𝑛𝑝𝑢𝑡 is maximum input current of inverter and 𝐼 𝑚𝑝_𝑚𝑜𝑑𝑢𝑙𝑒 is current at maximum power point of PV module.…”

Section: Methods 21 Designing the Fpvmentioning

confidence: 99%

A 48-MW floating photovoltaic design and integration to a grid

Adrianti

Agung

Nasir

et al. 2023

IJEECS

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Photovoltaic is one of the renewable power sources with the highest growth in recent decades. However, large photovoltaic capacities require enormous areas for installing the modules, which is frequently troublesome. This issue could be addressed by a floating photovoltaic system since it can be installed on the surface of unutilised lakes, and dams. This study aims to design a 48-MW floating photovoltaic at Lake Singkarak and determine a connected substation to the West Sumatra Grid. PVsystem and digsilent powerfactory were used in this study as the calculation and simulation tools. The study’s results discover that the 48-MW floating photovoltaic design consists of 96,000 photovoltaic modules of 500 Wp and 16 inverters of 3,000 kVA. Simulation results showed that Solok substation is the most optimum choice to connect the floating PV, as it provides better voltage profiles, fewer power losses and a shorter distance. The harmonic simulation also showed the THDv of 2.14% at 150 kV of Solok substation, which is still within acceptable limits.

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Section: Methods 21 Designing the Fpvmentioning

confidence: 99%

A 48-MW floating photovoltaic design and integration to a grid

Adrianti

Agung

Nasir

et al. 2023

IJEECS

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show abstract

“…The inverter was equipped with a maximum power point tracking (MPPT) controller to regulate the DC side of the inverter by using a DC-DC boost converter. The duty ratio of the boost converter changes according to the MPPT Perturb and Observe (P&O) technique to obtain the maximum power from the PV panels and maintain a constant DC voltage input to the inverter of 800 V which is suitable for 400V line to line voltage of PV three phase inverter (12). The control of active power in a photovoltaic (PV) inverter is a complex process that involves several components and techniques as shown in Figure 5, the DC link controller, which regulates the DC voltage to remain constant around 800 volts.…”

Section: Case Study Descriptionmentioning

confidence: 99%

Control approach for photovoltaic inverters enhancing the primary grid using the virtual synchronous generator concept

Ghazzawi,

Omar,

Mahmoud

2024

An-Najah University Journal for Research - A

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This paper presents a control scheme for virtual synchronous generators (VSGs) in PV inverters, designed to enhance grid frequency and voltage. Through the skillful management of active and reactive power, this control scheme enables PV inverters to interact seamlessly with the main grid in response to grid events, including voltage and frequency fluctuations. The VSG controller is implemented using Matlab Simulink, and its effectiveness is rigorously assessed under various scenarios in a case study involves a 50 kVA rated PV inverter, a 50 kW rated PV system, and a 220 V grid phase voltage. In conditions of low power generation from the PV system (solar radiation of 200 W/m²) and high load power (120 kW and 37.5 kVAr), the load voltage drops to 202.4 V. The VSG controller successfully raises the grid voltage by 17.6 V, stabilizing it at 220 V. Conversely, in scenarios of high PV power generation (solar radiation of 1000 W/m²) and low load power (20 kW and 7.5 kVAr), the grid voltage surges by 10 V, reaching 230 V. The proposed control strategy adeptly fine-tunes the voltage, ultimately stabilizing at 220 V. Additionally, when the frequency deviates within ±0.4 Hz from the nominal frequency of 50 Hz, the proposed control effectively restores the frequency to its nominal value.

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“…PV output power estimation: DC Power generated from PV system is mainly dependent on different factors including PV peak power at standard test condition (STC), solar radiation and ambient temperature. This simple model is represented in Equation (1) [21].…”

Section: Pv Output Power Estimationmentioning

confidence: 99%

“…It can be determined by considering the aggregate costs linked to system installation, component sizing, running expenses, and maintenance, consolidated into an annual cost. This annual cost is then divided by the energy consumed by the load, as calculated in (21) [32,33].…”

Section: Cost Of Energymentioning

confidence: 99%

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The Significance of Considering Battery Service-Lifetime for Correctly Sizing Hybrid PV–Diesel Energy Systems

Omar

2023

Energies

Self Cite

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This study emphasizes how crucial it is to consider battery service lifetime when determining the optimal battery size in PV–diesel hybrid systems. It investigates how battery size influences the evaluation of hybrid systems and their lifetime due to battery cycling. Unlike previous research that relies on assumed battery lifetimes, this study delves into the tangible impact of battery cycling, revealing the intricate relationship between battery size, cycling behavior, and service lifetime. Utilizing HOMER Pro version 3.14.2 software, a case study assessed three battery capacities (300 Ah, 800 Ah, and 1000 Ah) in a hybrid PV system catering to a 24 kWh daily demand. Across varying assumed lifetimes (5, 10, and 20 years), the study found that a 300 Ah battery was the most feasible under a 5-year assumed battery lifetime. However, for 10-year and 20-year battery lifetimes, the 800 Ah system emerged as the optimal choice, emphasizing the influence of assumed lifetime on determining the optimal battery size. Throughput battery lifetime analysis estimated service lifetimes of 4.9, 10.96, and 13.64 years for the 300 Ah, 800 Ah, and 1000 Ah batteries, respectively. Notably, smaller-rated batteries exhibited shorter estimated service lifetimes linked to usage patterns. Among the systems assuming a 20-year calendar lifetime, the optimal 800 Ah system, with a service lifetime of 10.96 years, yielded an energy cost of 0.312 USD/kWh, annual costs of USD 2736.5, and a total cost of USD 37,450. Considering service lifetime, the 800 Ah system emerged as optimal, contrasting the initially favored 300 Ah system under a 5-year assumed lifetime. This underscores the crucial significance of comprehending and integrating service lifetime considerations to optimize the economic feasibility of PV hybrid systems.

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Improvement Approach for Matching PV-array and Inverter of Grid Connected PV Systems Verified by a Case Study

Cited by 10 publications

References 23 publications

A 48-MW floating photovoltaic design and integration to a grid

A 48-MW floating photovoltaic design and integration to a grid

Control approach for photovoltaic inverters enhancing the primary grid using the virtual synchronous generator concept

The Significance of Considering Battery Service-Lifetime for Correctly Sizing Hybrid PV–Diesel Energy Systems

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