Study of Solar Power Plant (SPP) With 1.51 Mwp Capacity At Tanjungpura University

ABSTRACT


INTRODUCTION
Indonesia's geographical location along the equator presents diverse advantages and great potential for harnessing solar energy.The country enjoys a relatively high average solar radiation of 4.8 kWh/m2/day [1],, making it a favorable candidate for solar power generation (Photovoltaic Solar Power Plants -PLTS).Many energy systems worldwide, both existing and under development, heavily rely on fossil fuels [2].However, studies have shown that the use of fossil fuels poses several issues, which have been extensively analyzed and addressed [3].Environmental impacts, resource scarcity, supply risks, and price fluctuations have contributed to the shift away from fossil fuels as the central carbon-based economic driver [4], [8].Furthermore, fossil fuels are non-renewable resources, presenting concerns over energy sustainability for future generations.
The city of Pontianak, situated on the equator, receives abundant and limitless sunlight, making it an ideal location for harnessing solar energy.Implementing Photovoltaic Solar Power Plants (PLTS) in West Kalimantan offers a viable solution to complement the region's energy needs while promoting the use of clean, renewable energy.This initiative also aids in educating students, the youth of Indonesia, about the importance of renewable energy in achieving the country's goal of becoming carbon-neutral by 2060 [6], [10].
The Bralian Merdeka Yanuar Building, part of Tanjungpura University, comprises five structures, including conference halls, a library, lecture halls A and B, and an integrated laboratory.To meet the building's electricity demands, solar energy generated by PLTS will be supplied [9].
This study is conducted at Tanjungpura University, utilizing an 11,075 m2 land area and 2800 solar panels with a total capacity of 1.51 MWp and 540 Wp per unit, alongside 12 inverters with a capacity of 100 kWp, to accommodate PLTS usage.The solar-generated electricity will be channeled to the Bralian Merdeka Yanuar Building.The design of large-scale solar power plants, exceeding 500 kW capacity, requires careful consideration of energy calculations and azimuth angle comparisons, facing southwest and north.Therefore,

Study of Solar Power Plant (SPP) With 1.51 Mwp Capacity At Tanjungpura University (Muhammad Daflie Ridwan)
110 the use of simulation and optimization software, such as PVSyst, is essential in facilitating this process [5], [7], [11].

METHOD
The Bralian Merdeka Yanuar Building consists of 5 main buildings, namely the Conference Building, UNTAN Library Building, Lecture Hall Building A, Lecture Hall Building B, and Integrated Laboratory Building.The building has one customer ID, 211002368229, with a total electricity demand of 1,009,980 kWh in the year 2022.In the process of meeting the electricity needs of the building, it is supplied with electricity from the state-owned electricity company (PLN) [13].The electricity demand is used to fulfill the electrical needs of each building and for various types of electrical loads, such as lighting systems, computers, printers, air conditioners (AC), water pumps, and others [12], [14].

Solar Power Plant Area Data
The data used in this research was obtained from field measurements.The results of the measurements revealed that the area of the building in this laboratory is 11,075  2 .

Orientation Solar Panel
This research utilizes two simulations, where each simulation has a different orientation of the solar panels.In the first simulation, the tilt angle and azimuth angle are set at 10° and -135° (southwest), respectively.In the second simulation, the tilt angle and azimuth angle are set at 10° and 0° (north), respectively [17], [19].

Simulation 1
Simulation 1 was obtained from the field data to determine the level of electricity production generated.It can be seen in the figure for a tilt angle of 10° and an azimuth angle of -135° (southwest) [16].

Simulation 2
Simulation 2 was obtained from the geographical location in the field.As the research location is situated south of the equator, the azimuth angle points towards the north (0°).It is used to determine the level of electricity production generated.It can be seen in the figure for a tilt angle of 10° and an azimuth angle of 0° (north) [20], [21].

Potential Energy Resources
In this research, solar energy potential is utilized for the power generation system.The solar irradiance data is obtained from the PVSyst software by inputting the coordinates of the intended Solar Power Plant (PLTS) location [21], [22].

Confugration Solar Panel
The solar panels used are JA Solar JAM72S30 540 Wp, with an open circuit voltage (Voc) of 49.60 V, maximum power voltage (Vmp) of 41.46 V, and maximum power current (Imp) of 12.97 A. The inverter used is Huawei SUN2000 100KTL M1, with a minimum inverter voltage (Vmin Inverter) of 200 V, maximum input voltage (Vmax Inverter) of 1000 V, and maximum input current (Imax input inverter) of 26 A. The calculation to determine the number of solar panels to be connected in series or parallel can be done based on the following equation s [23].To calculate the minimum series connection, use equation 1, for the maximum series connection, use equation 2, and for the maximum parallel connection, use equation 3 [24].
A. To calculate the minimum series connection.
The minimum solar panels are connected in series per string.
B. To calculate the maximum series connection.
The maximum solar panels are connected in series per string.
C. To calculate the minimum parallel connection The maximum solar panels are connected in parallel per string

RESULTS AND DISCUSSION
The testing of Simulation 1 and Simulation 2 results using PVSyst software yielded electricity production for the energy needs of the Bralian Merdeka Yanuar Building over one year..The peak electricity production occurs in July, which is around 3.7 kWh/kWp/day.The average electricity production per day is approximately 3.54 kWp.With a total solar panel capacity of 1,512 kWp, the daily average electricity production amounts to 5,352.48 kWh/day.To find the electricity production value for January, equation 4 can be used [23], [25].The average performance ratio over one year remains stable at 0.777 or 77.7%.Meanwhile, the simulation results in Figure 6 also show a stable performance ratio at 0.778 or 77.8%.The calculation of the performance ratio can be done using equation 5.The results of the calculations based on this equation are as follows.Rasio performa [23], [25].The peak electricity production occurs in July, which is around 4.3 kWh/kWp/day.The average electricity production per day is approximately 3.56 kWp.With a total solar panel capacity of 1,512 kWp, the daily average electricity production amounts to 5,382.72 kWh/day.To find the electricity production value for January, equation 5 can be used [23], [25].The average performance ratio over one year remains stable at 0.777 or 77.7%.Similarly, the results from Simulation in Figure 7 show a stable performance ratio at 0.778 or 77.8%.The performance ratio can be calculated using equation 5.The results of the calculations based on this equation are as follows.

CONCLUSION
Based on the obtained data, to find the most optimal configuration in terms of energy production, a comparison can be made between the electricity demand of the Bralian Merdeka Yanuar Building and each simulation.For further clarification, please refer to Table 3 and Table 4 Power Plant Electricity Production (kWh); 183.100,Difference; 89.680.The total electricity demand in the Bralian Merdeka Yanuar Building is approximately 1,009,980 kWh/year, and the total electricity production from the Solar Power Plant is around 1,963,300 kWh/year.Thus, the difference between them can be utilized for other electricity needs or can be sold to the State Electricity Company, amounting to approximately 953,320 kWh/year.

Figure 1 .
Figure 1.The Electricity Demand of Bralian Merdeka Yanuar Building Based on Figure 1, it can be observed that the highest electricity demand in Bralian Merdeka Yanuar Building occurs in August, amounting to 101,780 kWh.Meanwhile, the lowest electricity bill is recorded in April, totaling 67,200 kWh [15].

Figure 4 .
Figure 4. Tilt angle and azimuth angle 2.3Potential Energy ResourcesIn this research, solar energy potential is utilized for the power generation system.The solar irradiance data is obtained from the PVSyst software by inputting the coordinates of the intended Solar Power Plant (PLTS) location[21],[22].

Table 1 .
Electricity Production from Simulation 1

Table 2 .
Electricity Production from Simulation 2