Microgrid Design in Electricity Supply in Paper Factories

ABSTRACT

New renewable energy is a concern or spotlight as an environmentally friendly alternative crop compared to conventional plants. Based on Law No. 30 of 2007, Energy is the ability to do work in the form of heat, light, mechanics, chemistry, and electromagnetics. Furthermore, to clarify energy, the term energy will be classified into primary energy, sec, secondary, non-renewableble energy. (ESDM, 2007) In Indonesia, it is estimated to have considerable solar energy potential considering Indonesia's geographical location in the tropics, based on solar irradiation data in Indonesia, which has the potential to produce electricity of 207.9 GWp. Under these conditions, solar power development for electricity is projected to have been utilized around 6.5 GWp in 2025 and 45, Gwpwill ben uused45 GWp in 2050 or ,22% of what is expected. The condition of the national energy general plan for the use of solar energy has been utilized is 78MW from the 0.04% utilized. Based on the regulation of Permen-LH Law No. 27 of 1999 concerning environmental impact analysis, forcing power plants to design to reduce exhaust emissions from the use of raw materials for making steam boilers, namely gas and coal, limited fossil energy sources, high fuel prices, and an abundance of new renewable energy resources, plant owners need to develop new and renewable energy to meet the electrical energy needs of paper mills and Environmentally friendly. (CANDY on Environmental Impact Analysis Number 27, 1999) The current condition of paper mill consumption is supplied with gas fuel power plants with a capacity of 2x4.2 MW, diesel fuel plants with a total of 5x 4.2MW an,d PLN adjusting the needs between 2MW to 8MW. Electricity production data uses data forfour4 years from 2019 to 2022 which the average production of both fuel gas supply plants is ±2.,7MW and the average use of PLN is > 4.5M. Thediesel generation is only used as a backup when there is a voltage drop. Based onfoufoursars, electricity consumption data is averaged for all supplies, namely 4MW -5 MW.

Table 1. Data on electricity production during 2019 -2022
Referring to this, the production of electricity produced from plants with capacities has different values; this is due to a decrease in performance in generation in electricity production and in reducing CO2 exhaust emissions released by plants. To overcome the need for electrical energy production in factories, reliable alternative energy sources must be considered to build an effective system to reduce CO2 exhaust emissions. Judging from the condition of the plant in the middle of the city, design the use of a Solar Rooftop. The use of Solar Rooftop has several advantages, namely solar panels that are very environmentally friendly, do not use fossil fuels, do not emit harmful greenhouse gas emissions such as carbon dioxide, solar panels are easy to install or maintain, solar panels greatly contribute to reducing noise pollution or solar panels work very quietly, and a very long service life of 20-30 years.
For the reliability of the electric power system, it is also necessary to pay attention to such as the standard voltage profile of the network area, which is 3.3kV, in order to create no harm in the electricity supply to the factory to design the use of Solar Rooftop. On this basis, research was conducted on the use of PLTS in reducing exhaust emissions produced by plants. The research was conducted in the approach of exhaust emissions and the need for electricity supply, a design was carried out if PLTS Rooftop was used to supply the needs of the paper mill by simulating with software. Therefore, the author made the idea of discussing "Microgrid Design in Providing Electricity to Paper Mills"

METHODS
This chapter will present the electrical modeling system in the factory area power plant, previously the electricity supply in the factory area using PLTG, PLN, and PLTD power plants. The existence of the Paris Agreement, whereby least developed countries and small island developing countries can prepare and deliver strategies, plans, and actions for development that are low in greenhouse gas emissions according to their specific situations.
Base on the Minister of Energy and Mineral Resources No. 16 of 2020 concerning the National Action Planned for Reducing Greenhouse Gas Emissions (RAN GRK) is a work plan document for the implementation of various activities that directly and indirectly reduce GHG emissions in accordance with the national development target as outlined in Presidential Regulation Number 61 -2011 concerning the National Action Plan for Reducing Greenhouse Gas Emissions (RAN GRK) which is a planning guideline, implementation, monitoring and evaluation of GHG emission reduction. In this Presidential Regulation, there is a description of GHG emission reduction targets and strategies in five main sectors, which include agriculture; forestry and peatlands; energy and transportation; industry; and waste management.
Based on these two guidelines, PLTS modeling will be carried out planned using rooftop facilities; modeling here will show the potential that can be generated with a limited area, offer the benefits obtained if installing rooftop PLTS in terms of exhaust emissions, and at the end, it is displayed showing the modeling of the Rooftop PLTS system when entering the network.

RESULTS AND DISCUSSION
In this chapter, we will discuss the condition of electricity generated by PT. Alpha5 by looking at the monthly energy profile in 2019 -2020, planning the potential of modeling that can be developed in the area of PT. Alpha5 by looking at the possibility of sunlight that can cause photovoltaic, calculating the potential for electrical energy that can be generated, determining the number of modules used, and see the potential for exhaust emissions to be blocked using PLTS; Data simulation to know the stability of the PLTS Rooftop modeling system that is interconnected to the generation network using ETAP 12.6 software.

A. Electrical condition generated by PT. Alpha5
Based on the results of data collection taken from the producers and fuel consumption needed for electricity generation produced for three consecutive years. The conditions in the

B. Energy potential that can be generated by PLTS Rooftop
The potential energy that PLTS Rooftop can produce can be seen from systematic calculations and simulations through PVSyst. Systematically generated energy potential From the data it can be seen that the average solar insulation is 6.38 kWh / m2. Therefore ESH can be calculated: ESH = Annual Average Insulation/Standard Insulation = 4,87 x 1000/1000 = 4.87 Jam Based on the calculation above, the amount of potential energy generated from the PLTS system can be estimated. The planned solar system is 0.132 MWp, but for the suitability of design needs, the capacity of PLTS becomes 132 kWp. In the design of this PLTS system, it is planned to use solar modules with the power of each module 440 Wp, so that the number of solar modules is: Total of modules = Solar Capacity/Module Capacity = 132.000 Wp/440 Wp = 300 solar panel Next, calculate the potential energy produced by the PLTS system using the formula: Potential PV Energy = Solar Capacity x ESH = 132.000 x 4,87 = 642.840 Wh/day From the calculation of generated energy above, some will be lost due to various losses in the system. So the energy that can really be utilized is: PV Energy Potential Utilized = PV Energy Potential / Potential Loss = 642.

C. Potential energy generated by simulation
To find out how much potential energy is generated can also be done using the help of simulation software. In this study, the calculation of generated energy was carried out using PVSYST Software.

Conclusion
The research that has been conducted on microgrid design in providing electricity to paper mills can be concluded as follows : (1) The old potential of energy that the PLTS Rooftop can produce can be seen from systematic calculations and simulations through PVSyst, which is 4.87 hours. (2) Based on the potential electricity that can be generated, which is 132 kW with a design using a 440wp solar panel capacity with the number of modules used as much as 300 pc per module and assembled 75 strings assembled in series as much as 4. (3) 7) Simulation 1 ETAP shows that PLTG and PLN enter the network, and there is a lot of voltage drop starting from the distribution transformer and the components below it. Judging from the bus, the most voltage drop is 72.67% in the PLN 4 panel, and the overvoltage is 109.23% in the F4 panel. The F2 panel shows that some buses have experienced voltage drops where they have not reached the tolerance limit, which is the bus limit tolerated at 95%. The total active power value is 13748.31kW, and the real reactive power is 11272.44 kvar. 1. The F3 panel shows that some buses have experienced voltage drops where they have not reached the tolerance limit; namely, the bus limit is tolerated 95%. The total active power value is 9998.7kW, and the real reactive power is 8198.14 kvar. The total on all buses shows that some buses have experienced voltage drops where they have not reached the tolerance limit; namely, the bus limit is tolerated at a minimum of 95%, and toleration is a maximum limit of 105%. It can be kvar. The F3 panel shows that some buses have experienced voltage drops where they have not reached the tolerance limit, which is the bus limit tolerated at 95%. The total active power value is 9998.7kW, and the real reactive power is 8198.14 kvar. The total on all buses shows that some buses have experienced voltage drops where they have not reached the tolerance limit; namely, the bus limit is tolerated at a minimum of 95%, and the maximum limit is 105%.