JournalTOCs

Jurnal Ilmiah Mahasiswa SPEKTRUM
Number of Followers: 0

This is an Open Access Journal

Open Access journal
ISSN (Print) 2302-3163
Published by Universitas Udayana

[62 journals]

RANCANG BANGUN MODEL PENGIDENTIFIKASI SUARA HURUF HIJAIYAH DENGAN METODE
MEL FREQUENCY CEPSTRUM COEFFICIENT DAN CONVOLUTIONAL NEURAL NETWORK
- Authors: Robbani Punggawa Arcapada, Widyadi Setiawan, I Made Arsa Suyadnya
  Pages: 1 - 7
  Abstract: Learning the Qur'an is a necessity for a Muslim, because the Qur'an acts as a guide
  and way of life. One thing that is learned in the Qur'an is how to pronounce Hijaiyah letters or
  Makharijul letters. In learning Makharijul Letters it takes an ustaz or accompanying teacher who
  is limited by distance and time. To overcome the limitations of distance and time, a learning
  application model is needed that can be accessed without the limitations of distance and the
  time. This is studied aim to develop the Hijaiyah letter recognition model using the Mel
  Frequency Cepstrum Coefficient (MFCC) and Convulational Neural Network (CNN) methods.
  Based validation results, the model built using the MFCC and CNN methods can identify the
  letters read with an accuracy of 49.1%. Then based of the test result with Confusion Matrix, this
  model have a precision value of 50%, recall is 53%, and F-Measure is 0.514.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p1
  Issue No: Vol. 8, No. 4 (2022)
STATUS PERKEMBANGAN SEPEDA LISTRIK DAN MOTOR LISTRIK DI INDONESIA
- Authors: I Pt Agus Surya Adi P, I Nyoman Satya Kumara, I Gusti Agung Pt Raka Agung
  Pages: 8 - 19
  Abstract: The development of electric vehicles in Indonesia began in 1997 by the Indonesian
  Institute of Sciences (LIPI) but since 2013 has slowed down. Presidential Regulation 55/2019
  strengthens the development of electric vehicles in Indonesia which followed by several
  supporting regulations. Currently, the development of electric vehicles, both in terms of research
  and industry or commercial products, is getting better. This paper reviews the current status of
  electric bicycles and electric motorcycles in Indonesia which are commercially available. The
  research was conducted by through online survey during 2020-2021 which produced a
  database of electric bicycles/motorcycles. Currently, there are 64 electric bicycles and 44
  electric motorcycles. These vehicles use either two or three wheels with electric drive capacity
  between 180 W to 4200 W. The most common electric motor used is BLDC at 87%. The electric
  bike/motorcycle has speed ranges between 20 km/h to 70 km/h with battery capacity of 5,2 Ah
  to 70 Ah with milage ranging from 15 km to 200 km. The information presented will help
  stakeholders to get a quick overview of the development of electric bicycles/motorcycles in the
  country and serves as benchmark for developing electric bicycles or motor to meet domestic
  needs.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p2
  Issue No: Vol. 8, No. 4 (2022)
STUDI TERHADAP UNJUK KERJA PEMBANGKIT LISTRIK TENAGA SURYA ATAP KANTOR
DESA PADANGSAMBIAN KAJA
- Authors: Baskara Formasakti, I Nyoman Setiawan, Ida Ayu Dwi Giriantari
  Pages: 20 - 28
  Abstract: The Padangsambian Kaja Village Government in Denpasar City through the SDGs
  program from the Ministry of Villages, Development of Disadvantaged Regions and
  Transmigration has implemented clean and renewable energy. The power plant being operated
  is the rooftop solar power plant with a capacity of 7,2 kWp which is connected to the PLN
  network. The study was conducted to determine the performance of the installed solar power
  plant with the help of HelioScope software simulation. Energy production will be compared
  between the simulation results of the 2 scenarios with the results of monitoring on the inverter in
  the period from May to July 2021, so that it will be known the factors that influence the
  production of solar power plant energy. The results show the potential for energy production
  each year from the simulation results of scenario 1 and scenario 2 respectively are 9.964 kWh
  and 10.306 kWh, and the simulation results for energy production in the period from May to July
  in scenario 1 and scenario 2 respectively are 2.937,3 kWh and 3.057,8 kWh. Energy production
  from scenario 1 and scenario 2 simulation is higher than real energy production, with a
  difference of 180,9 kWh with a percentage of 6,1% for scenario 1, and 301,4 kWh with a
  percentage of 9,8% for scenario 2.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p3
  Issue No: Vol. 8, No. 4 (2022)
PERKEMBANGAN RISET DAN PRODUK KOMERSIAL SISTEM PEMBERSIH PANEL SURYA
- Authors: Muhammad Malik Al Falah, I Nyoman Satya Kumara, Wayan Gede Ariastina
  Pages: 29 - 39
  Abstract: The cleanliness of the solar panels is one of the factors that affect the energy
  production of a solar power plant. Solar panel cleaning is a solution to keep solar panels clean
  so that energy production can be optimal. This article reviews research developments and
  commercial products for solar panel cleaning, with the result showing various applicable
  techniques and commercial products for solar panel cleaning purposes. There are two distinct
  techniques used in solar panel cleaning, manual and automatic. The manual cleaning method is
  a method that conducts any action to operate the system manually by humans. The automatic
  cleaning method is a method that is controlled directly by the system without the need for
  human interference. Commercial solar panel cleaning products include telescopic poles
  equipped with brushes and water pumps, a robot that is permanently attached to the solar panel
  support construction equipped with dry clean and water clean methods, a robot with portable
  systems using long roller brushes, a convenient robot which has a remote vacuum cleaner
  system, to a mobile cleaning system using a robotic arm.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p4
  Issue No: Vol. 8, No. 4 (2022)
ANALISIS SISTEM PENGAMAN BACKUP UNTUK MENGAMANKAN BUSBAR 150 Kv TERHADAP
GANGGUAN DI GIS PECATU
- Authors: I Nyoman Wardana, I Gede Dyana Arjana, Cok. Gede Indra Partha
  Pages: 40 - 49
  Abstract: High power needs in badung area, especially Pecatu and Nusa Dua resulted in the
  need for GIS development to increase power supply. GIS Pecatu uses a double busbar with
  OCR as its Backup safety, if one of the busbars is disrupted and there is no protection rele that
  secures the busbar, it will result in continuous power flow is disrupted.
  In this study, an analysis of the rele busbar setting and the appropriate protection
  setting as a reference protection system in GIS Pecatu. The results of the calculation of current
  setting obtained the working current value (Iset) OCR of 1339 A and (Iset) GFR 223 A and
  delay time 0.53 seconds, actual working time rele 0.35 Standard Inverse, and the value of short
  circuit interference current calculation from PLN 11.58 kA and based on simulation results
  obtained 11.46 kA with a percentage of errors of 0.12%.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p5
  Issue No: Vol. 8, No. 4 (2022)
STUDI KOORDINASI SISTEM PERALATAN PROTEKSI PADA PENYULANG PIDADA UNTUK
MENDAPATKAN SETTING PENGAMAN YANG SELEKTIF
- Authors: Kadek Adiyaksa Pramana, I.B Gede Manuaba, A.A Gede Maharta Pemayun
  Pages: 50 - 56
  Abstract: An electric power distribution system must be able to provide electricity to customers. So that
  the company as a provider is required to provide the best for its customers by increasing the
  reliability of the distribution system. The more customers who use electricity, the greater the possible
  fault current, therefore it is necessary to calculate the protection in order to minimize the occurrence
  of short circuit disturbances. The protection used on the Pidada feeder is Overcurrent Relay (OCR)
  and Ground Fault Relay (GFR), this protection relay is used to coordinate current settings in
  accordance with applicable standards and can overcome short-circuit fault currents. In this research,
  a study of the coordination of the Pidada feeder's OCR and GFR settings was conducted using the
  DigSILENT PowerFactory 15.1.7 application. Calculations were carried out using the zone division
  method on the feeder. based on the results of the study, it was found that the Pidada feeder was 0.2
  s, the Bulu Indah recloser was 0.1 s and the Padang Udayana recloser was 0.02 s. Then on and the
  ground fault relay (GFR) obtained results on the Pidada feeder 0.2 s, Bulu Indah recloser 0.1 s and
  Padang Udayana recloser 0.08 using standard inverse characteristics. The results of this study are
  in accordance with the applicable standards, where the standard used is IEC 60255 with a drading
  time of 0.3-0.5 seconds.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p6
  Issue No: Vol. 8, No. 4 (2022)
ANALISIS SISTEM PEMBUMIAN TOWER SALURAN TRANSMISI DARI GARDU INDUK KAPAL
– GARDU INDUK GIANYAR
- Authors: IGP Agung Satya Wicaksana, IW Arta Wijaya, IGN Janardana
  Pages: 57 - 62
  Abstract: This study aims to improve the earthing value of transmission lines which have an earth
  value less than the standard value off SPLN No 121: 1996, namely 10 and recommend an
  earthing system that meets the standards. Theemethodduseddissa descriptive method by
  calculating the value of the earthing system by following the SPLN standard No. 121: 1996. This
  analysis consists of several stages, namely a site survey, measuring soil resistance (R) to
  calculate the value of soil resistivity (') then calculating the value of grounding resistance with 5
  types of grounding systems to achieve grounding resistance 10 , namely one electrode
  grounding system, 2 electrode grounding system planted vertically S > L, 2 electrode earthing
  system planted vertically S < L, plate earthing system, and a grid-rod earthing system. The
  results of the research are for paddy fields using a vertical one-electrode earthing system, the
  value is 7.32 ' with a manufacturing cost of Rp. 857,000, on farmland with a vertical oneelectrode
  earthing system, the value is 8.36 ' with a manufacturing cost of Rp. 1,363,000, and
  on clay soil with a vertical one-electrode earthing system, the result is 7.98 ' with a
  manufacturing cost of Rp. 857,000.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p7
  Issue No: Vol. 8, No. 4 (2022)
ANALISIS LIGHTING ARRESTER UNTUK MENGAMANKAN BUSBAR 150 kV TERHADAP
GANGGUAN SURJA PADA GIS PECATU
- Authors: I Putu Agus Kumara Putra, I Gede Dyana Arjana, Cok. Gede Indra Partha
  Pages: 63 - 72
  Abstract: GIS (Gas Insulated Switchgear) Pecatu is one of the GI built by PT. PLN (Persero) to
  provide energy continuity to its customers. In the GIS Pecatu there is no lighting arrester (LA)
  because the equipment in the GIS Pecatu is located indoors. Where there is only LA from the
  direction of the GI Nusa Dua to the GIS Pecatu with a distance of 12.08 km, so it is necessary
  to do study to find out whether the LA from the GI Nusa Dua direction to the GIS Pecatu can
  protect the busbar from the traveling wave of lightning surge .
  The results of the analysis showed using the software simulation method that LA from
  the direction of the GI Nusa Dua to the GIS Pecatu has been able to protect the GIS Pecatu
  busbar. Simulation results obtained that the current passing through the 150 kV busbar of 1,219
  kA and the voltage on the busbar during a lightning surge of 4 kV. The voltage on the busbar
  and the current through the busbar during a surge is still within the tolerance of the maximum
  system voltage of 170 kV and the current ratio of 4 kA.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p8
  Issue No: Vol. 8, No. 4 (2022)
STUDI EKONOMIS PENGGUNAAN PLTS ROOFTOP 3 KWP FRAMELESS WITH ON-GRID SYSTEM
PADA PELANGGAN R/4400 VA
- Authors: I Komang Widi Astawa, Ida Ayu Dwi Giriantari, I Wayan Sukerayasa
  Pages: 73 - 83
  Abstract: PLTS is one of the renewable energy technologies sourced from sustainable energy,
  namely the sun. The potential for solar energy is quite good, making Bali one of the targets for
  the energy mix. This research focuses on the production of PV mini-grid energy, saving
  electricity costs and finding out whether it is profitable or not to invest in the location, especially
  in one of the SARBAGITA areas located in Perum Nuansa Jimbaran from an economic point of
  view. The method used is an economic analysis of investment feasibility, with supporting
  indicators such as DF, NPV, BCR, DPP, LCC, COE and CRF by considering economic aspects.
  Yield of this study found that the selling price of PLTS power to PLN was IDR. 1,444.70/kWh,
  investment cost PLTS is IDR. 61,274,248, it can generate savings of IDR. 5,078,700/year and
  cumulative income for the 25th year is IDR. 109,341,618. Price sensitivity is very influential on
  the cost of PV mini-grid revenue. COE at the energy selling price of IDR 2,888/kWh, can also
  show the feasibility of the investment so that the investment can be said to be economically
  profitable.
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p9
  Issue No: Vol. 8, No. 4 (2022)
STUDI TEKNIS PLTS ROOFTOP 3KWP FRAMELESS WITH ON-GRID SYSTEM DI LINGKUNGAN
KORI NUANSA JIMBARAN
- Authors: I G.N.A.B Rama Wahyu Dewangga, Ida Ayu Dwi Giriantari, I Wayan Sukerayasa
  Pages: 84 - 93
  Abstract: Solar light is an environmentally friendly renewable energy. According to RUEN, Bali
  Province has a fairly large potential for solar light utilization, namely 1,254 MW with a target for
  PLTS development in 2025 of 8.62% or 108.2 MW of its total potential. Therefore, this research
  focuses on the utilization of PLTS Rooftop on-grid as an energy supply at Kori Nuansa
  Jimbaran's residence which explains the specifications of the installed PLTS materials and
  components, as well as the design of the PLTSinstallation in Rooftop terms of technical terms
  according to the requirements of PT. PLN (Persero). The method used is literature review,
  observation, data collection, data analysis and conclusions. The results showed that the total
  daily load calculation was 26,151 W/day and the total daily energy that could be generated from
  the calculation was 14.58 kWh/day with the measurement results at the research location of
  13.4 kWh/day where there was a difference of 1.18 kWh caused by due to losses in the system.
  When viewed from the total daily load the PLTS system has not met the needs, but functionally
  the PLTS system is intended for daytime loads so that the needs are appropriate. Optimal
  inclination angle of 14.66calculation results areº however on measurementsusing a protractor
  tool obtained18º this because the angle of inclination of the solar panels follows the direction of
  the slope of the roof. The installed PLTS design has met the standards of the Minister of Energy
  and Mineral Resources No. 49 of 2018 and has received an Operational Worthiness Certificate
  (SLO) from PT. PLN (Persero).
  PubDate: 2022-01-08
  DOI: 10.24843/SPEKTRUM.2021.v08.i04.p10
  Issue No: Vol. 8, No. 4 (2022)