During the COVID-19 pandemic since early 2020 in Indonesia, the demand for electrical energy in the housing sector has increased significantly. This is due to the government’s recommendation to reduce activities on the outside and work from home, specifically for educational and entertainment activities. Those are almost recommended to be done online. Many people complain about the increase in monthly electricity payments compared to before the pandemic. The construction of solar power plants in housing/solar home systems (SHS) will reduce the electricity consumption from the public grid. This SHS installation can be used to supply some household electricity needs, such as computers, televisions, internet facilities, lighting, et cetera. In this article, the researchers discuss the performance testing of SHS with a capacity of 300 Wp. It is installed in the house buildings accompanied by the design and measurement of solar energy potential.
The use of solar PV system in Indonesia has expanded to various field and area. One example is residential buildings in urban areas. This article discusses calculation methods for designing a solar power generation system that is applied to residential buildings, such as homes, offices, or colleges. Electricity generated from the solar home system (SHS) is used to support many kinds of electrical equipments, where the electrical equipments are used by building occupants in their daily life. The calculation method is considered from the potential of solar energy and the reliability of the on-site system to generate electricity. The system is designed in an off-grid topology by exchanging connections with the public electricity grid owned by PLN. Calculation results shows that this SHS has a generation capacity of 1 kWp, 24 V 300 Ah battery storage, and a 200 W inverter. This SHS can reduce electricity usage in this sector by 18.2 kWh in average every month.
The goal of this paper was to create an adaptive virtual inertia controller (VIC) for superconducting magnetic energy storage (SMES). An adaptive virtual inertia controller is designed using an extreme learning machine (ELM). The test system is a 25-bus interconnected Java Indonesian power grid. Time domain simulation is used to evaluate the effectiveness of the proposed controller method. To simulate the case study, the MATLAB/Simulink environment is used. According to the simulation results, an extreme learning machine can be used to make the virtual inertia controller adaptable to system variation. It has also been discovered that designing virtual inertia based on an extreme learning machine not only makes the VIC adaptive to any change in the system but also provides better dynamics performance when compared to other scenarios (the overshoot value of adaptive VIC is less than -5×10-5).
<span lang="EN-US">The characteristics of the photovoltaic module are affected by the level of solar irradiation and the ambient temperature. These characteristics are depicted in a V-P curve. In the V-P curve, a line is drawn that shows the response of changes in output power to the level of solar irradiation and the response to changes in voltage to ambient temperature. Under partial shading conditions, photovoltaic (PV) modules experience non-uniform irradiation. This causes the V-P curve to have more than one maximum power point (MPP). The MPP with the highest value is called the global MPP, while the other MPP is the local MPP. The conventional MPP tracking technique cannot overcome this partial shading condition because it will be trapped in the local MPP. This article discusses the MPP tracking technique using an evolutionary algorithm (EA). The EAs analyzed in this article are genetic algorithm (GA), firefly algorithm (FA), and fruit fly optimization (FFO). The performance of MPP tracking is shown by comparing the value of the output power, accuracy, time, and tracking effectiveness. The performance analysis for the partial shading case was carried out on various populations and generations.</span>
A pyranometer is a device used to measure the level of solar irradiation. This device has a sensor that measures the density of the electromagnetic flux of solar radiation on a flat plane. The electromagnetic flux density parameter is converted into an electrical parameter in watts per square meter. Pyranometers are used in weather station devices to analyze and predict weather conditions. Solar power generation systems are usually also installed with this device. It is intended to monitor solar irradiation's condition to examine the generating system's performance. This article discusses the photovoltaic-based pyranometer characterization method. The characterization method is carried out to determine the measurement parameters such as accuracy, precision, and hysteresis. Knowing these parameters will make it possible to see the performance of measuring solar irradiation levels by a measuring instrument for solar irradiation levels, like a pyranometer. The characterization method is to compare the measurement results with standard instruments. The solar irradiance level monitoring is also optimal, accurate, and precise with a reliable measurement method.
Abstrak-Paper ini menyelidiki distribusi medan listrik pada isolator gantung berbahan polimer ketika isolator tersebut terkena kontaminan. Isolator gantung yang dianalisis mempunyai inti gelas dan akan disimulasikan menggunakan perangkat lunak berbasis FEM (Finite Element Method). Kontaminan yang digunakan adalah air laut. Simulasi dilakukan dengan membandingkan kondisi medan listrik pada permukaan isolator yang terkontaminasi air laut dengan kondisi normal. Selain itu, juga akan dianalisis pengaruh sudut kontak terhadap karakteristik distribusi medan listrik di isolator. Oleh karena itu, bentuk kontaminan divariasikan dengan mempertimbangkan sudut kontak Kemudian, untuk mengetahui pengaruh lebih dalam, analisis dilakukan di tiga tempat yang berbeda, yaitu pada bagian inti, permukaan isolator dan sirip terdekat dengan tegangan kerja isolator. Dari analisis yang dilakukan, diketahui bahwa kontaminan yang menempel tidak banyak mempengaruhi persebaran medan listrik pada bagian inti, namun menjadi sangat berpengaruh pada persebaran medan listrik di permukaan isolator dan sirip terdekat dengan tegangan kerja isolator. Lebih jauh lagi, sudut kontak dari kontaminan mempengaruhi besar dan karakteristik dari persebaran medan listrik secara signifikan. Kata Kunci : Batang Inti Bahan Gelas, Isolator Gantung Polimer, Kontaminan Air Laut, Sudut KontakAbstract-The paper investigates the electric field distribution in polymer suspension insulator when exposed to contaminants. The analyzed suspension insulator has glass core and will be simulated using FEM (Finite Element Method) software. Contaminant used is sea water. Simulations carried out by comparing the condition of the electric field on the surface of the insulator which is contaminated by seawater with normal conditions. In addition, the influence of the contact angle on the characteristics of the electric field distribution in insulators will also be analyzed. Therefore, the shape of contaminants are varied by considering the contact angle Then, to determine the deeper influence of contaminant, the analysis is carried out in three different places, which is the core part, the surface of the insulator and the fin closest to the working voltage insulator. From the conducted analysis, it is known that the contaminants are not much affected the electric field distribution at the core, but became very influential in the distribution of the electric field at the surface of the insulator and the fin closest to the working voltage insulator. Furthermore, the contact angle of contaminants affects the characteristics of the distribution of the electric field significantly
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