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All Journal Singuda ENSIKOM Bulletin of Electrical Engineering and Informatics Jurnal Teknovasi : Jurnal Teknik dan Inovasi Mesin Otomotif, Komputer, Industri dan Elektronika Indonesian Journal of Electrical Engineering and Computer Science Jurnal SImetri Rekayasa Journal of Technomaterial Physics Jurnal Nasional Teknik Elektro dan Teknologi Informasi
Ali Hanafiah Rambe
Universitas Sumatera Utara
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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ANALISIS PERAMALAN KEBUTUHAN ENERGI LISTRIK PROVINSI SUMATERA UTARA MENGGUNAKAN METODE PERAMALAN KUANTITATIF SEKTORAL Syafriwel Syafriwel; Ali Hanafiah Rambe; Dadan Ramdan
Jurnal Teknovasi : Jurnal Teknik dan Inovasi Vol 3, No 1 (2016): Teknovasi April 2016
Publisher : LPPM Politeknik LP3I Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55445/teknovasi.v3i1.79

Abstract

Seiring waktu kebutuhan dan permintaan listrik oleh masyarakat terus mengalami peningkatan. Agar persediaan listrik dapat tercukupi dan terhindar dari defisit energi maka perlu dilakukan suatu perencanaan. Langkah awal yang perlu dilakukan adalah melakukan peramalan kebutuhan energi listrik yang akan terjadi dimasa yang akan datang. Dalam peramalan penelitian ini telah dilakukan peramalan beberapa tahun kedepan dengan data aktual yang sudah terjadi untuk melihat keakuratan metode peramalan yang digunakan. Hasil dari peramalan telah dibandingkan dengan data aktual yang dicatat PLN. Data yang digunakan adalah data historis berupa data pelanggan, daya tersambung, Kebutuhan energi dan rasio elektrifikasi tahun 2007 sampai tahun 2014. Data historis tahun 2007 sampai tahun 2012 digunakan sebagai data untuk melakukan peramalan kebutuhan energi listrik pada tahun 2013 dan 2014. Data aktual tahun 2013 dan 2014 dibandingkan dengan data hasil peramalan tahun 2013 dan 2014. Selanjutnya data hasil peramalan tahun 2013 dan 2014 juga dibandingkan dengan data Proyeksi RUPTL PLN. Berdasarkan hasil dari peramalan untuk tahun 2013 dan 2014 dapat diketahui error jumlah pelanggan 0,04% dan 1,91%, Daya tersambung 3,44% dan 2.3%, dan kebutuhan energi 5,31% dan 7,71%. Jika dibandingkan dengan proyeksi dari RUPTL, hasil peramalan penelitian diperoleh hasil yang lebih baik karena error lebih kecil dibandingkan dengan RUPTL untuk tahun 2013 dari 6,41% sampai 13,2% sedangkan tahun 2014 mencapai error 10% sampai 17,55%. Dikarenakan hasil peramalan penelitian lebih mendekati data aktual maka dengan cara yang sama dapat direkomendasikan peramalan energi untuk 10 tahun kedepan.
Increasing transmission control protocol speed by reducing the acknowledgement collision probability Suherman Suherman; Ali Hanafiah Rambe; Norshakila Haris; Anhar Anhar
Indonesian Journal of Electrical Engineering and Computer Science Vol 22, No 1: April 2021
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v22.i1.pp121-128

Abstract

Transmission control protocol (TCP) employs acknowledgement (TCP-ACK) for every transmitted packets to ensure reliable transmission. As a result, it sends the next window packets after receiving the TCP-ACK packet of previous window. This means that the earlier the TCP-ACK packet arrives, the faster the TCP next window transmission and the better the TCP performances. To do so, there should be a special treatment to the transmitted TCP-ACK to fasten next window transmission. This paper proposes a collision probability reduction for the transmitted TCP-ACK packets so that the overall TCP delay reduces. Collision probability reduction can be implemented in many ways. Initially, mathematical analysis is provided to prove that method can work as expected. The mathematic analysis shows that when TCP-ACK collision probability is reduced, the overall TCP delay is also reduced. The proposed method is then implemented in 802.11, 802.16 and complex networks. The NS-2 simulations evaluations for the aforementioned networks and the proposed method proved that collision reductions on TCP-ACK exert average TCP delay reductions about 11.86%, 28.04% and 9.46% subsequently.The proposed method is also applicable for other TCP types.
RANCANG BANGUN SISTEM KENDALI KELISTRIKAN MASJID AL-ISTIQOMAH MENGGUNAKAN PENERIMA HC-12 BERBASIS ARDUINO Febriansyah Putra; Ali Hanafiah Rambe; Lisa Adriana Siregar
Jurnal Simetri Rekayasa Vol 4 No 1 (2022): Edisi April 2022
Publisher : Universitas Harapan Medan

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Abstract

The current development of control and automatic system technology allows operators to easily turn on and off electronic devices remotely without having to make direct contact, this is very effective in saving time and helping one's work become easier. Currently electrical energy is a basic human need. However, the use of electrical energy is not used optimally, its use tends to be excessive, the cause is due to someone's negligence of an electrical device that forgot to turn it off. To overcome this problem, it is necessary to have an automatic control system that can control the switch to help minimize the waste of electrical energy. However, various kinds of automatic control system devices have drawbacks, including requiring an internet connection or using an SMS gateway so that they can be controlled remotely, which will increase spending on the budget for internet or credit needs every month. The method used in this design uses Arduino uno, HC – 12 module, ZMTC103C current sensor, and relay. This tool works when an instruction signal is received via the HC-12 module then the signal is forwarded to Arduino to turn on or turn off the electric device through a relay, the current sensor detects the condition of the electric device. From the results of testing the control system successfully turns on and off loads in the form of lights, fans, water pumps properly and can detect lights that go out.
Pencapaian Lebar-Pita Antena Mikrostrip dengan Tingkap Tergandeng untuk Frekuensi 2,4 GHz Ali Hanafiah Rambe; Muhammad Zulfin; Riswan Dinzi
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 6 No 1: Februari 2017
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1262.185 KB)

Abstract

Aperture coupled technique is designed to increase microstrip antenna bandwidth. This paper discusses bandwidth enhancement of the aperture coupled rectangular patch microstrip antenna for working on 2.4 GHz. The optimal design is determined by using the AWR simulator. The fabricated antenna is then analyzed using a vector network analyzer (Anritsu MS2034B). The results show that the antenna is able to achieve 110 MHz bandwidth with return loss is less than –9.54 dB. The bandwidth increment is approximately 77.13% higher than the directly fed antenna.
Analysis of the Surface Matrix of Copper Cable in Jointing as the Effect of Increasing Current and Heating on Fire Application Hasugian, Supriedi; Hasan, Syafruddin; Rambe, Ali Hanafiah; Supiyani
Journal of Technomaterial Physics Vol. 6 No. 1 (2024): Journal of Technomaterial Physics
Publisher : Talenta Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jotp.v6i1.15777

Abstract

This research aims to analysis of the surface matrix of copper cable in jointing as the imfluence of increasing current and heating on fire experiment. The investigation makes it easier to observe parts of its material of the surface matrix changes of copper cable in jointing as increasing of heating. The study was observed the material surface of general requirements for electrical installations (PUIL) jointed cables and standard NYA ø 1.5 mm2 cables at current load of 50 A and 110A using HIROX digital microscope, XRF (X-ray fluorescence), Raman spectroscopy, and fluke infrared thermometer (FLIR). The results of the study were obtained that the PUILsample jointing heat cable reached of 201oC and 1087oC with heat standard cable of 25.6oC. The copper cable will melt when the cable reached in over heating of 1080oC that it caused the deformation of the cross-sectional area of the cable which are observed in changes in the surface matrix of the burned cable structure. This research can be used as scientific basic for inverstigating the caused of fires and the heat maximum application on the cables.
Co-Authors Akbar Parlin Anhar Anhar Apli Nardo Sinaga Aprial Umardi Cakra Danu Sedayu Chandra Elia Agustin Tarigan Dadan Ramdan Denny Osmond Pelawi Denny Pasaribu Dian Ratih Utami Dimas Yudha Prawira Eden Herdani Eva Smitha Sinaga Febriansyah Putra Fellix Deriko Franklin Torangma Sianturi Franky Simanjuntak Frans Christian Sitompul Giat Fransisco Batubara Haditia Pramuda Harahap Hadratul Hendra Hasugian, Supriedi Hermanto Siambaton Hisar Fransco Sidauruk Ibrahim Sinaga Lisa Adriana siregar Maria Silalahi Marshal Andrea Hutabarat Meinarty Sinurat, Meinarty Muhammad Ihsan Muhammad Zulfin Neronzie Julardi Nevia Sihombing Norshakila Haris Ochan F.S Purba Pindo Ahmad Alfadil Purwoko, Agus Ramando Sinaga Ramli Qadar Lubis Rinesia Citra Amalia Bangun Riswan Dinzi Riswan Dinzi Suherman Suherman Supiyani, Supiyani Surya Surya Syafriwel, Syafriwel Syafruddin Hasan Syafruddin Hasan Syarifah Asyura Windu Bastian Winny Friska Uli Wira Indani Yahya Ahmadi Brata Zul Hariansyah Hutasuhut