Performance Analysis of Grid-Connected PV Rooftop, at Sakon Nakhon Province, Thailand

Abstract

The performance ratio (PR) based on IEC 61724 standard is calculated under the influence of seasonal variations and the capability of the system. On the other hand, The National Renewable Energy Laboratory (NREL) of the U.S. Department of Energy proposed the weather-corrected performance ratio (PRcorr). This PRcorr index calculates the performance of the PV system which has taken the weather variations that influence the cell temperature into account. Both techniques were compared with the simulation program to analyze the PR index according to system conditions. The study site is the on-grid PV rooftop at Kasetsart University Chalermphakiat Sakon Nakhon (CSC). The PV panel is oriented to the southwest, 215 degrees azimuth. The angle of the inclination of the panel is 17 degrees. The result shows the trend of monthly PRcorr with little variations. At the same time, the PR value over the year has a lot of variations. The variation of PRcorr and PR is 2.39 and 5.07, respectively. PRcorr has low variability due to the correction of weather factors. The average cell temperature is an important variable. To calculate the average temperature of the panels, one year of data is needed to filter out distorted information. The system available condition is an important factor for the on-grid PV system at low voltage.

RETRACTED: Analysis of the efficiency of 300 kw grid-connected solar photovoltaic systems at Bukhara state university

“…The properties of a grid-connected solar photovoltaic system were analyzed using the 1998 IEC 61724 standard (International Electrotechnical Commission, 1998) [6,7]. The performance indicators presented in this standard are very important to evaluate the performance of photovoltaic systems and to determine the losses shown by the systems [8]. The evaluated parameters are the performance factor, energy output, system collection losses, final output and power utilization factor.…”

Analysis of the efficiency of a 300kw solar photovoltaic system in the climate of uzbekistan

“…The properties of a grid-connected solar photovoltaic system were analyzed using the 1998 IEC 61724 standard (International Electrotechnical Commission, 1998) [6,7]. The performance indicators presented in this standard are very important to evaluate the performance of photovoltaic systems and to determine the losses shown by the systems [8]. The evaluated parameters are the performance factor, power output, system collection losses, final power and power utilization factor.…”

“…The annual energy production of a solar photovoltaic power plant is calculated as follows 𝐸 𝑃𝑉 = 𝑃 𝑟,𝑝𝑣 𝐷 𝑓 𝑃 𝑠ℎ 𝑁 𝑑 (1) where 𝐸 𝑃𝑉 -the output power of the photovoltaic device is kW•h, 𝑃 𝑟,𝑝𝑣 -nominal power of the photovoltaic device kW, 𝐷 𝑓 -overall reduction factor, 𝑃 𝑠ℎ -average daily maximum solar hour, 𝑁 𝑑 -the number of days in a period, such as a year. The coefficient of reduction of the nominal characteristics is calculated by modeling the actual temperature of the element as follows [7][8][9]:…”