9 research outputs found
PERANCANGAN DAN ANALISA KELAYAKAN PEMBANGUNAN SISTEM PHOTOVOLTAIC BERKAPASITAS 60 KWP DI PEMBANGKIT PEMARON
Get PDFPerencanaan pembangunan Photovoltaic (PV) di pembangkit Pemaron ditujukan sebagai salah satu upaya untuk menurunkan penggunaan daya dari jaringan listrik PLN. Dengan menggunakan PV diharapkan mampu memberikan pengurangan terhadap pemakaian listrik sendiri dari unit pembangkit dan gedung pembangkit Pemaron. Pada perancangannya digunakan sistem PV tanpa trafo karena listrik dari inverter langsung dijadikan sebagai sumber listrik untuk unit pembangkit Pemaron. Besarnya daya dari inverter yang digunakan adalah sesuai dengan pemakaian daya di pembangkit Pemaron itu sendiri yaitu 54.388 watt, atau dibulatkan menjadi 60kW. Sebagai pembangkitannya digunakan modul PV dengan kemampuan hingga 200 watt, sehingga diperlukan 300 buah modul dengan kombinasi rangkaian seri dan paralel untuk mendapatkan tegangan dan arus yang sesuai dengan spesifikasi inverter yang digunakan. Pemasangan sistem PV ini dapat memberikan kontribusi terhadap penghematan dalam penggunaan listrik dari PLN dengan memperhitungkan 25 tahun masa pakai efektif PV sekitar 25 tahun dengan nilai sekitar US$ 126.081
Penerapan Sistem SCADA Audit Energi Listrik Berbasis Raspberry-Pi Codesys Dengan Komunikasi Modbus TCP Di Workshop Elektro Politeknik Enjinering Indorama.
Get PDFThe Covid-19 pandemic has an impact on almost all sectors of people's lives including the industrial sector.. According to Director of Energy Conservation Haryanto, the efforts that the industry can do to survive the current pandemic period is with conservation and energy efficiency, because when an industry has implemented an energy efficiency system, the industry will be able to reduce energy costs and reduce carbon dioxide (CO2) emissions. This research aims to create a prototype system that can support effective and efficient energy utilization efforts through the monitoring system of electricity use in the Politeknik Enjinering indorama Electrical department Workshop building so that it is expected to be used as a reference for energy audit systems both in the community environment and in the Politeknik Enjinering Indorama in order to aim for energy utilization. In this system Nodemcu ESP 8266 which acts as an RTU (Remote Transfer Unit) will send the results of processing data measurement sensor PZEM 004t to MTU (Master Transfer Unit) Raspberry pi using the Communication Protocol Modbus TCP, then the data received by MTU from RTU will be displayed to the display HMI (Human Machine Interface) Webvisu from Codesys so that sensor measurement data can be monitored in real time in the Politeknik Enjinering indorama Electrical department Workshop building either through the Computer or mobile phone. Based on the results of PZEM04T sensor testing for energy use for 30 days obtained the largest energy usage data, namely on line 1 of 83235.31 KWh, on line 2 of 79122.49 KWh and on line 3 of 26289.15 with accuracy rates for each line1, 2 and 3 which is 4.46%, 4.87% and 9.89%. The conclusion of this study that the system successfully functioned in accordance with the purpose of the study is to monitor the use of electrical energy in the Electrical Engineering wokshop building both through mobile phones and PCs in real time to be further referenced to the process of effective and efficient energy utilization in the future.Keywords: Energy Audit; PZEM04T; Raspberry Pi Codesys; Modbus TCP
Optimization Design of Single-Tuned Passive Filter Using Particle Swarm Optimization Algorithm in Industry
Get PDFIn the industrial sector, the widespread use of non-linear loads such as inverters and variable speed drives has led to increased harmonic distortion, which negatively impacts power quality. These harmonics can cause equipment malfunctions, overheating, reduced system efficiency, and potential failures in power infrastructure. This study aims to optimize the design of a Single-Tuned Passive Filter (STPF) using the Particle Swarm Optimization (PSO) algorithm to minimize harmonic distortion in industrial electrical systems. Harmonic measurements in a representative system revealed Total Harmonic Distortion of current (THDi) values of 20.2%, 20.3%, and 18.6% for phases L1, L2, and L3, respectively, with the 5th and 7th harmonic orders being the most dominant. Initial simulation using standard filtering reduced THDi to 3.03%, 3.10%, and 2.89%, but significant residual harmonics were still present. By applying a PSO-optimized STPF, the THDi was further reduced to 2.42%, 2.43%, and 2.23%, indicating a marked improvement in harmonic mitigation. These findings confirm that the PSO-based design approach effectively enhances filter performance, resulting in improved power quality, increased system reliability, and better protection of electrical equipment. The implementation of the optimized STPF is particularly valuable in industrial environments such as the automotive sector, where power stability and equipment longevity are critical
Aplikasi Penjulan Barang Pada Toko Elektronik Suka Maju
No full textIn this time technology is growing very rapidly. Technological developments can also be used in a variety of ways, one of which is in stores. Many stores still use the system of selling and buying manually, such as the Suka Maju Electronics Store. Using the manual system will take longer and the sale or purchase process becomes inefficient.Therefore the author makes a sales application at Suka Maju Electronics Store Java-based by using Neatbeans and MySQL. This application is used to process transactions and other services at Suka Maju Electronics Store. Making this application aims to improve services and facilitate users in the sales process, stock addition, and minimizing errors in making report
Sara Detection on Social Media Using Deep Learning Algorithm Development
No full textSocial media has become a key platform for disseminating information and opinions, particularly in Indonesia, where SARA (Ethnicity, Religion, Race, and Intergroup) issues can fuel social tensions. To address this, developing an automated system to detect and classify harmful content is essential. This study develops a deep learning model using Convolutional Neural Network (CNN) and Bidirectional Long Short-Term Memory (BiLSTM) to detect SARA-related comments on Twitter. The method involves data collection through web scraping, followed by cleaning, manual labeling, and text preprocessing. To address data imbalance, SMOTE (Synthetic Minority Over-sampling Technique) is applied, while early stopping prevents overfitting. Model performance is evaluated using precision, recall, and F1-score. The results demonstrate that SMOTE significantly improves model performance, particularly in detecting minority-class SARA comments. CNN+SMOTE achieves a accuracy of 93%, and BiLSTM+SMOTE records a recall of 88%, effectively capturing patterns in SARA and non-SARA data. With SMOTE and early stopping, the model successfully manages class imbalance and reduces overfitting. This research supports efforts to curtail hate speech on social media, especially in the Indonesian context, where SARA-related issues often dominate public discourse
Application of Ultra-Wideband Double Layer Printed Antenna for Partial Discharge Detection
Get PDFPartial discharge (PD) is a local electrification phenomenon that partially connects insulation between the conductors and occurs either on the surface of the conductor or inside the insulation (void). During the PD there are several phenomena that accompany the occurrence of PD, such as impulse currents, heat radiation, electromagnetic waves, mechanical waves and chemical processes. This phenomenon is detected and measured to know the existence of PD. One of the PD measurements is ultra high frequency (UHF) method, by measuring the waves generated by PD using antenna. One of antenna having good characteristics is UWB double layer printed antenna. In this paper the application of ultra-wideband double layer printed antenna for partial discharge detection is reported. The application of antenna on PD measurement, shows that the antenna is able to detect PD. The characteristics of PD: PDIV, PDEV, PD waveform are measured using this antenna. Ultra-wideband (UWB) double layer printed antenna is an antenna developed from a square microstrip antenna with symmetrical T-shaped tethering. The proposed antenna is implemented on Epoxy FR-4 substrate with permittivity of 4.3, thickness of 1.6mm, and 72.8mm x 60.0mm in size. The VNA testing of the antenna shows that the antenna bandwidth is from 50MHz to 2.30GHz. The measured results of PD wave are PDIV, PD waveform and PDEV
ANALISIS BIBLIOMETRIK PERKEMBANGAN MUTAKHIR DALAM STUDI ANISOTROPI SEISMIK (2017 -2022): BIBLIOMETRIC ANALYSIS OF RECENT DEVELOPMENT IN THE SEISMIC ANISOTROPY STUDIES (2017 -2022)
Get PDFThe development of seismic anisotropy needs to be studied systematically hence research could be focused on the latest scientific knowledge, therefore a bibliometric analysis is needed as a measurement of citation strength in the form of mapping "co-occurrence", "co-author" and "co- citation", thus the strength of the research direction could be well understood. The software which is used; VOSviewer version 1.6.18 examined at least 494 papers in the SCOPUS domain during 2017 -2020. It appears from the results that the development of the seismic anisotropy are very rapidly dominated by the needs of the applied science and pure science. The heavily publication countries are United States of America, China and Japan. However, in reality, this density does not necessarily correspond to the number of citations between countries, as well with publications in Japan
Pembuatan Batik Dengan Teknik Pewarnaan Colet Sebagai Upaya Pelestarian Budaya dan Pemberdayaan Masyarakat
Get PDFBatik comes from the root word 'tik' which means dot. Basically, batik means dotted, while batik means to make dots. In Javanese, dots are called cecek, which is an important part of batik. Batik is an intangible cultural heritage that has been designated by UNESCO since 2009. Therefore, efforts are needed to develop batik in people's lives. One effort that can be made to preserve culture is to modify and maintain the existence of that culture. The aim of this batik training is to improve the economy of the Dukuh Simo community because in the batik training the training participants directly practice how to make batik using the dabbing technique. This training directly involved the Dukuh Simo community, consisting of PKK women. In this research the author used a qualitative descriptive approach. Data collection techniques used are observation, interviews, and documentation. It is hoped that the results of this research will increase the knowledge and economy of residents and ensure that batik remains a culture that has been preserved for generations
JUNO Sensitivity on Proton Decay Searches
Get PDFThe Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid
scintillator detector designed to explore many topics in fundamental physics.
In this paper, the potential on searching for proton decay in mode with JUNO is investigated.The kaon and its decay particles feature a
clear three-fold coincidence signature that results in a high efficiency for
identification. Moreover, the excellent energy resolution of JUNO permits to
suppress the sizable background caused by other delayed signals. Based on these
advantages, the detection efficiency for the proton decay via is 36.9% with a background level of 0.2 events after 10 years of data
taking. The estimated sensitivity based on 200 kton-years exposure is years, competitive with the current best limits on the proton
lifetime in this channel.Comment: 14 pages, 12 figures, an author adde
