Abstract
This paper presents a method to estimate the yield and analyze the performance of a grid-connected photovoltaic (PV) power plant including a rooftop PV system and a solar farm. The yield model was developed based on a commercial PV model in a MATLAB/Simulink environment. A simulation model is built to connect with the PV rooftop system and the solar farm in which their total installed capacities are 0.986 and 30.7 MW, respectively. The simulated and measured final yield results of a rooftop PV system in Vietnam are compared. Additionally, this paper provides a function of reducing the final yield corresponding to different PV operation temperature values. Furthermore, the performance of both a rooftop PV system and a solar farm, in Vietnam, are evaluated as the rated power of 0.986 and 30.7 MWp, respectively. The results also show that their performance is satisfactory, in which the value of the performance ratio (PR) average reaches 70% for the rooftop PV system and 80.45% for the solar farm within a six-month period, in 2019. The PR is also compared with a global PR average from 70% to 80% for a sufficiently well-performed solar system.
Highlights
The performance ratio (PR) and capacity factor (CF) of the systems are determined from the yield model and measured solar radiation
From Equations (11) and (12), Equation (10) is rewritten as: E f inal = HPDC Lsystem where H is effective global corrected solar irradiance in kWh/m2, npv is the efficiency of the PV module under standard test condition (STC) in %, PDC is the rated power of PV array with commercial PV module at STC, A is the area of the PV module, Lsystem is total losses of the system,Earray is the yield of array, and E f is the final yield
The comparison between the simulation and measurement results shows a gap for the simulation and measurement ranging from 0.95% to 4.9% for the rooftop PV system, and from 0.82% to 3.5% for the solar farm
Summary
In Southeast Asia, is one of the countries that has the best solar radiation in Asia. In. 2015, Polo [1] published a potential solar radiation mapping in Vietnam using satellite-derived and GIS-based information. Of the provinces (30/63), in Vietnam, had an average solar radiation higher than 4.5 kWh/m2. The south central of Vietnam has great solar radiation potential for developing solar power plans, with an average number of sunshine hours ranging from 1700 to 2500 h per year, and a solar radiation of 4.9–5.7 kWh/m2 /day. The grid-connected photovoltaic (PV) systems, in Vietnam, have been strongly. Grid-connected photovoltaic systems, Vietnam, have been strongly promising, since thethe.
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