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Prototype of AC Microgrid Solar Power Plant with Off-Grid System
Get PDFAC microgrid solar power plants can be used as an alternative to overcome the problem of unevenly distributed electricity demand in Indonesia. Prior to implementation, a model or prototype is required to test and provide insights about the solar power plant's functionality as an electric energy generator. The aim of this research was to develop a solar power plant for AC loads and assess the performance of AC Microgrid solar power plants using an Off-grid system. The test results lead to the conclusion that the efficiency of the AC Microgrid solar power plant with the Off-grid system is highly dependent on the intensity of solar radiation, whether it is high or low, striking the panel. The solar panel efficiency ranged from a maximum of 5.54% to a minimum of 4.16%, while the system efficiency varied between a maximum of 8.65% and a minimum of 7.95%
Kinetical Study of Adsorption Active and Non Activated Carbon from Chocoa Skin in Methyl Violet Solution
Get PDFMethyl violet solution has particular color and mostly used to coloring in textiles industry and traditional cloth making. The liquid wastes containing this color can be reduces or removed by several methods, one of which is by adsorption using carbon as an adsorbent. The chocoa plant is abundant in Indonesia while its fruit consists of 60.67% lignin, 36.47% selulosa and 18.90% hemiselulosa [1]. Hartono et al. [2 &3] reported cassava’s skins contain protein, cellulose and crude fiber can be used as basic material (similarly with chocoa skin) of producing active carbon. This research is to develop more on reducing methyl violet (as particular color) containing in liquid waste by adsorbent from chocoa skin with variation of reaction time between active carbon and non-activated carbon for constant particle sizes of 48 Mesh (-425/+250 mm), and also to study the kinetical reaction of chocoa skin active carbon and non-activated carbon for adsorbing methyl violet in term of Freundlich and Langmuir isotherm equations. The result shows the kinetical adsorption of both active and non-activated carbon from chocoa skin as adsorbent follows Langmuir isotherm equation with adsorption capacity of 579.91 mg/g and 338.94 mg/g respectively.Â
Analisis Arus Gangguan Hubung Singkat Pada Feeder Tampinna Gardu Induk Tegangan Ekstra Tinggi Wotu
Get PDFAn electric power system is a complex system consisting of a powerplant, transmission system and distribution system that operates simultaneously in distributing electric power. In the distribution of electric power can not be separated from the occurrence of abnormal conditions of the system or disruption so that it needs a protection system to overcome the occurrence of interference. Disruption that often occurs in the electrical power system is a short circuit disruption so that a short circuit analysis is carried out as a first step in determining the right protection system. Short circuit disorder is a type of disruption that occurs in an electric power system due to an increase in excess current due to a decrease in the strength of isolation from the channel both between phases and between phases and earth. Tampinna feeder is one of the feeders in Wotu Extra High Voltage Substation. In this study will be calculated how much the current of short circuit interference in the feeder and the working time of the protection relay, namely OCR and GFR. From the calculation obtained a maximum short circuit disruption in three phases amounting to 771.86 A, two phases amounting to 668.45 A and one phase to the ground amounting to 370, 6 A
Reducing Cycle Time in the Manufacturing Process of Circular Pattern Interpolar Products (CPIP) Using Special Fixtures on a 3-Axis CNC Machine
Get PDFThis research focuses on the design of fixture aids to support the manufacturing process of Circular Pattern Interpolation Products (CPIP), such as disk brake components, flanges, turbine disk runners, and other plate components with circular feeding patterns in the 3-Axis CNC machining process. The objective of this study is to achieve more efficient CPIP production times on 3-Axis CNC machines. The research methodology employed a design and build approach, involving the design of fixture aids, fabrication, and testing during the production of turbine disk runners on a 3-Axis CNC machine. This was done by comparing the initial workpiece setup time and the workpiece clamping transfer time using CPIP production aids versus not using CPIP production aids. The results showed that the designed CPIP Fixture significantly reduced the CPIP manufacturing Cycle Time, with a reduction of 63.11% in the initial workpiece setup time and 83.55% during the clamping transfer process
Studi Penggunaan Relai Diferensial Sebagai Sistem Proteksi Pada Pembangkit Listrik Tenaga Uap (PLTU) Barru
Get PDFPenelitian ini bertujuan untuk mendapatkan gambaran tentang sistem kerja relai diferensial pada Pembangkit Listrik Tenaga Uap (PLTU) Barru serta untuk mendapatkan gambaran settingan slope yang tepat untuk relai diferensial pada sistem Pembangkit Listrik Tenaga Uap (PLTU) Barru. Karena relai diferensial merupakan proteksi utama pada transformator maka dari itu penulis melakukan studi penggunaan relai diferensial sebagai sistem proteksi transformator agar settingan relai tersebut tetap dalam keadaan normal tanpa gangguan. Hasil penelitian ini menunjukkan sistem kerja relai diferensial pada Pembangkit Listrik Tenaga Uap (PLTU) Barru yaitu berdasarkan pada besaran arus gangguan di luar zona. Apabila berdasarkan pada besaran nominal maka arus besar yang melewati sekunder transformator akan merusak peralatan serta setting slope yang tepat untuk relai diferensial agar dalam keadaan normal pada sistem proteksi Pembangkit Listrik Tenaga Uap (PLTU) Barru sesuai pada besaran arus gangguan di luar zona yaitu sebesar k = 0,533 sampai k = 2
Analisis PV Bus Pada Sistem Kelistrikan Sulselbar 56-Bus PT. PLN (Persero)
Get PDFSistem distribusi merupakan salah satu sistem dalam tenaga listrik yang mempunyai peran penting karena berhubungan dengan pemakai energi listrik. Penyediaan tenaga listrik yang stabil dan kontinu merupakan syarat mutlak yang harus dipenuhi. Dalam memenuhi kebutuhan tenaga listrik tersebut, terjadi pembagian beban yang tidak merata antar setiap fasa-nya. Dalam proses penyaluran listrik sangat memperhatikan kestabilan tegangan tetapi kerap kali mengabaikan rugi-rugi pada sistem transmisi. Adapun penelitian ini mencoba menyimulasikan kondisi pelepasan beberapa PV bus pada sistem kelistrikan Sulselbar 56-Bus PT.PLN (Persero) menggunakan software MATLAB serta PV bus yang di lepas pada sistem yaitu Pembangkit PLTA Bakaru, PLTD Suppa, dan PLTA Bili-Bili. Hasil simulasi berupa losses tersebut mengalami kenaikan sebesar 4,26 MW dan tegangan mengalami penurunan sebesar 0,098 p.u dengan kondisi PLTGU Sengkang telah bekerja secara optimal sebagai Slack bus
Rancang Bangun Rangkaian Kontrol Otomatis Tanpa Sensor Cahaya Dan Monitoring Baterai Lampu Penerangan Jalan Panel Surya Berbasis Internet of Things (IoT)
Get PDFLampu Jalan Tenaga Surya (PJUTS) memanfaatkan Panel Surya dengan masa pakai hingga 25 tahun yang berperan dalam menangkap sinar matahari dan mengubahnya menjadi listrik melalui proses fotovoltaik. Lampu ini memiliki kemampuan otomatis untuk menyala saat senja dan mati di pagi hari. Pada penelitian merancang sistem kontrol otomatis tanpa sensor cahaya pada lampu penerangan jalan menggunakan panel surya serta memantau tegangan baterai menggunakan IoT. Hasil pengujian diperoleh bahwa rangkaian kontrol otomatis bekerja sesuai rancangan bahwa lampu akan pada saat tegangan panel surya lebih dari 12 Volt yang menandakan adanya Cahaya matahari. Sistem monitoring juga bekerja dengan baik dengan diperolehnya 4000 data selama 4 hari pengujian. Namun masih terdapat kekurangan pada kapasistas baterai dan kalibrasi sensor teganga
ANALISIS KINERJA PROTEKSI OVER CURRENT RELAY (OCR) PADA SISI 150/20 KV TRANSFORMATOR 30 MVA GARDU INDUK SENGKANG
Get PDFTo maintain the continuity of electricity distribution, the performance evaluation of overcurrent relays, or Over Current Relays (OCRs), as a protection system needs to be conducted periodically. The reliability of the protection system is a key factor in improving customer service. This research aims to analyze the performance of OCRs on the 150 KV and incoming 20 KV sides of the Sengkang Main Substation. The research results indicate that the accuracy of the OCR Pick Up current is 3.92% (150 KV) and 1.87% (20 KV), with Drop Off to Pick Up OCR ratios of 95.83% and 95.28%, respectively. The relay's time characteristic on both sides of the transformer has also been tested and meets the standards of PT. PLN (Persero), with an error rate smaller than ±5%. Therefore, the performance of OCRs at the Sengkang Main Substation can be considered reliable based on the established standards
ANALISIS KONTINGENSI SISTEM TENAGA LISTRIK DENGAN METODE FAST DECOUPLED UNTUK MENGHITUNG ALIRAN DAYA DI GARDU INDUK TELLO
Get PDFContingency is a disturbance in the form of the release of one or more elements of the electric power system. This condition is related to the reliability of operation of an electric power system which must still carry out its duties to serve the existing load if a disturbance occurs in one of its elements. The aim of this research is to carry out a contingency analysis (N-1) based on the Performance Index using the Fast Decoupled power flow method in the Tello Main Substation electrical system with the help of MATLAB software. By combining quantitative and qualitative research methods to provide a more comprehensive understanding of system responses to system failures. Channel ranking is done based on the highest to lowest Performance Index (PI) value. The influence of the N-1 contingency on the electric power system above results in overload on buses 5-6. The first sequence is channel 5-6 with a PI value of 2.9464. Next, the second sequence is channels 1-6 with a PI value of 0.0001, on bus 1 there is a slack bus which can be a helper if there is a bus that needs power so that it doesn't drop too far which can cause overload. Furthermore, channels 1-2, 2-3, 2-5, 3-4, 4-5 with a PI value of 0.000, these channels have a smaller PI value due to minimal overload occurring when the N-1 contingency is carried out, this is due to the load being not too big on the channel and still able to support power that is not too large. Where if the PI value is greater than 1 then the PI value can be said to be overloaded and if the PI value is less than 1 then it can be said that the channel is in good condition. After carrying out a contingency simulation on the Tello Main Substation's electrical power system, it was found that the channel was experiencing overload as an impact on the system when the channel discharge occurred