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MENENTUKAN POTENSIAL PADA TITIK PENAMPANG KONDUKTOR BEBRBENTUK BUJUR SANGKAR DENGAN PERSAMAAN LAPLACE DAN SECARA NUMERIK Cekmas Cekdin; Faisal Damsi
TELISKA Vol. 15 No. 3 (2014): Teliska September 2014
Publisher : Teknik Elektro Polsri

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (183.332 KB)

Abstract

Permasalahan dalam mendapatkan medan potensial pada penampang konduktor berbentuk bujur sangkar dimana dalam literatur yang digunakan banyak metode yang digunakan matematisnya rumit yang menyita waktu yang lama dalam analisinya. Untuk itulah melalui paper penulis memaparkan untuk mendaptkan medan potensial pada titik-titik berbentuk bujur dengan menggunakan metode penyelesaian persamaan Laplace dan secara numerik. Karena dua metode ini masih dikategorikan masih cukup sederhana. Penyelesaian persamaan Laplace yang dilakukan untuk mendapatkan medan potensial pada penampang konduktor berbentuk bujur sangkar dilakukan secara manual, sedangkan secara numerik adalah adalah dengan bantuan komputer digital yang berbasis bahasa pemrograman MATLAB. Hasil yang didapat dari kedua metode tidak jauh berbeda.Kata kunci : Potensial listrik, penampang konduktor, persamaan Laplace, numerik.
SIMULASI MENENTUKAN SUDUT DAYA DAN WAKTU PEMUTUSAN KRITIS UNTUK KESETABILAN SISTEM TENAGA LISTRIK DENGAN METODE LYAPUNOV Cekmas Cekdin; A. Rahman A. Rahman
TELISKA Vol. 5 No. 1 (2013): Edisi 13 (Volume 5, Nomor 1, Januari 2013)
Publisher : Teknik Elektro Polsri

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Abstract

Dalam tulisan ini diangkat satu permasalahan gangguan mesin tunggal, yang akan ditentukan sudut daya dan waktu pemutusan kritisnya, sehingga dapat dicari tingkat kestabilan sistem tersebut. Kestabilan sistem diartikan sebagai kemampuan sistem untuk kembali dalam kondisi normal setelah terjadi gangguan. Untuk menganalisis kestabilan sistem daya disini digunakan analisis kestabilan peralihan karena kisaran masalah yang dianalisis menyangkut gangguan yang tidak memungkinkan menggunakan proses kelinearan. Dengan menggunakan model matematika persamaan fungsi Lyapunov akan dicari waktu pemutusan sistem dari gangguan. Uji simulasi dilakukan dengan bantuan perangkat lunak MATLABKata kunci: Sistem tenaga listrik, mesin tunggal, kestabilan peralihan, fungsi Lyapunov, model tak linear.
The Elimination of Overshoot Curve Response of Closed Loop in Proportional Integral (PI) Controller Azwardi, Azwardi; Cekdin, Cekmas
Proceeding of the Electrical Engineering Computer Science and Informatics Vol 2: EECSI 2015
Publisher : IAES Indonesia Section

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/eecsi.2.581

Abstract

Most operators in industry use trial and error method in determining the parameter in PID controller. This way is quite dangerous because it cannot predict what will happen in the next process. For this, we need a method that can adjust the changing of parameter in process, and simultaneously retune the parameter of controller automatically. Ziegler-Nichols method, a method for setting parameter of PID controller, can be use for eliminating the oscillation and reducing overshoot curve in a process. This method is common yet, but it offers simple procedure but produce quick and accurate result. This method analyzes the curve of a process. It is done when oscillation and overshoot projected onto x-axis (time) occurred. The parameters resulted from this analysis among others are: critical gain (Kpu), time/period oscillation (Tosc), static gain (K), proportional gain (Kp), integral time Ti, and differential time Td. These parameters will be tuned to PID controller using Ziegler-Nichols method. The overshoot (Mp) curve response of closed loop in this simulation is 0 %. It will save energy and time beside that the stability of system can be maintained.
PENGARUH TEMPERATUR TERHADAP RESISTANSI PADA THERMOELECTRIC GENERATOR TIPE SP 1848-27145 MODUL 5 SUSUNAN SERI KETIKA DIPANASKAN Cekdin, Cekmas; Hamzah, Amir
JURNAL SURYA ENERGY Vol. 3 No. 1 2018
Publisher : UNIVERSITAS MUHAMMADIYAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jse.v3i1.1265

Abstract

One source of potential energy with new innovations, namely the use of thermoelectric generator. Utilization of thermoelectric generators as a Heat power plant requires further study or research to produce an optimal system so that it can be a source of electrical energy substitutes in the provision of electrical energy. The working principle of the heat power plant is the first thermoelectric generator heated by filament where between filament and thermoelectric generator coated sheet metal. If the temperature of the heated metal is greater than the temperature of the metal heat dissipation, then the temperature difference causes a thermoelectric generator starts to work optimally. Measurement of Thermoelectric Generator with model number SP 1848-27145 carried out a total of 11 experiments on different materials with the same method. It consists of 4 modules compiled series, saddled lamp dc 12 Volt, 5 Watt. Optimization for charging the accumulator is 12 volts dc with temperature 270C and with a current that is obtained is 3.01 Ampere.
SIMULASI PERANCANGAN FASA TERTINGGAL SISTEM KENDALI DIGITAL Cekdin, Cekmas
JURNAL SURYA ENERGY Vol. 1 No. 1 2016
Publisher : UNIVERSITAS MUHAMMADIYAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jse.v1i1.562

Abstract

OPTIMASI TEMPERATUR DAN ARUS UNTUK MENGHASILKAN TEGANGAN 12 VOLT DC PADA THERMOELECTRIC GENERATOR MODEL SP 1848-27145 SEBAGAI ACCUMULATOR CHARGER Cekdin, Cekmas; Rahmayani, Siska
JURNAL SURYA ENERGY Vol. 2 No. 1 2017
Publisher : UNIVERSITAS MUHAMMADIYAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jse.v2i1.775

Abstract

One source of potential energy with new innovations, namely the use of thermoelectric generator. Utilization of thermoelectric generators as a Heat power plant requires further study or research to produce an optimal system so that it can be a source of electrical energy substitutes in the provision of electrical energy. The working principle of the heat power plant is the first thermoelectric generator heated by filament where between filament and thermoelectric generator coated sheet metal. If the temperature of the heated metal is greater than the temperature of the metal heat dissipation, so experienced certain temperature difference difference, then the temperature difference causes a thermoelectric generator starts to work optimally. Measurement of Thermoelectric Generator with model number SP 1848-27145 carried out a total of 11 experiments on different materials with the same method. It consists of 4 modules compiled series, saddled lamp dc 12 Volt, 5 Watt. Optimization for charging the accumulator is 12 volts dc with temperature 270C and with a current that is obtained is 3.01 Ampere.
Peranan Matriks Topologi Pada Sistem Jaringan Distribusi Listrik Berbentuk Radial Cekdin, Cekmas; Hamaulah, Hazairin
JURNAL SURYA ENERGY Vol. 4 No. 2 2020
Publisher : UNIVERSITAS MUHAMMADIYAH PALEMBANG

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32502/jse.v4i2.2118

Abstract

Matriks topologi merupakan teknik menganalisa jaringan listrik yang menggambarkan elemen jaringan sebagai segmen garis disebut cabang dan titik hubung sebagai  node yang keseluruhannya tergambar dalam suatu graph dari jaringan yang berbentuk radial. Untuk menentukan arus pada jaringan sistem distribusi  radial, terlebih dahulu menghitung arus yang mengalir pada beban yang paling ujung dalam kasus ini menghitung (I8-9) dan (I4-5). Kemudian bergeser menghitung arus pada beban yang mendekati dengan sumber yaitu : I7-8, I6-7, I1-6, dan I3-4, I2-3, I1-2, serta menghitung arus total pada jaringan (IG-Bus). Setelah arus dihitung semua pada setiap jaringan, kemudian disusun matriks topologi arus. Dalam menyusun matriks topologi arus, kolom dan baris yang tidak berhubungan pada matriks [A] diberi angka 0, sedangkan kolom dan baris yang berhubungan diberi angka 1. Dalam aplikasinya matriks topologi pada jaringan distribusi radial memungkinkan penyederhanaan yang bertujuan untuk perhitungan, yaitu dengan mengabaikan efek kapastansi sebagai bagian dari arus injeksi tiap node. Topology matrix is a technique of analyzing electricity networks that describes network elements as line segments called branches and connecting points as nodes which are entirely drawn in a graph of a radial-shaped network. To determine the current in a radial distribution system network, first calculate the current flowing at the very end of the load in this case calculate (I8-9) and (I4-5). Then shift counting currents at loads close to the source, namely: I7-8, I6-7, I1-6, and I3-4, I2-3, I1-2, and calculate the total current in the network (IG-Bus). After all currents are calculated in each network, a topology matrix is then arranged. In compiling the current topology matrix, the columns and rows that are not related to the matrix [A] are given the number 0, while the related columns and rows are given the number 1. In its application the topology matrix in the radial distribution network allows simplification aimed at calculation, namely by ignoring the effect capacitance as part of the injection flow per node.
The usage of thermoelectric generator as a renewable energy source Cekmas Cekdin; Zainuddin Nawawi; Muhammad Faizal
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 18, No 4: August 2020
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v18i4.13072

Abstract

Currently thermoelectric generators (TEG) are widely used in biomedical, military and space satellite power applications. TEG of high power plants are mostly used in automobile and industrial engines. This paper discusses TEG as a renewable energy source. Here the TEG in the application is used in the thermoelectric generator power plant. The working principle of this thermoelectric generator is on the heat side of the TEG peltier which is coated in metal in the form of aluminum, which is heated by a heater. And the cold side of the TEG Peltier is placed on the heat sink (as a heat dissipation metal). Heatsinks are submerged in water which are submerged about half or more. If the temperature of the metal being heated and the temperature of heat dissipation metal have a certain difference, then the temperature difference causes TEG to start working. The greater the temperature difference, the greater the electrical energy produced will be. However, if the temperature difference is too large it will damage the bismuth semiconductor material used. After TEG starts working it will produce voltage and current.
Pengaruh Pembebanan Terhadap Waktu pada Kopling Dua kumulator sebagai Sumber Daya Listrik Cadangan Cekmas Cekdin; Siti Sailah
Jurnal Rekayasa Mesin Vol. 21 No. 2 (2021): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v21i2.161

Abstract

The use of accumulators so far as an energy source is only in an emergency situation and is limited by the time of use. The tool is called an Uninterruptible Power Supply (UPS). The way of  the tool works  is ineffective and unreliable, so there there needs to be a new innovation that can be used at any time and is not limited to the time of use. The results of the study present the coupling of two accumulators as a backup power source as an alternative provider of the main energy source that can provide a way out in the event of interference from PLN, and work for a relatively long time. Coupling of Two Accumulators as a backup power source begins with determining the characteristics of each component such as accumulators, inverters, rectifiers, current booster circuits, and voltage sensors. The next step is to determine the maximum loading for the system to work long enough. Furthermore, it is analyzed carefully and in a long time so that the design results is really suitable for use as a coupling of two accumulators as a reliable backup power source
EVALUASI TINGKAT ISOLASI DASAR JARAK LINDUNG TRANSFORMATOR DI GARDU INDUK TALANG RATU PALEMBANG TERHADAP PENEMPATAN ARESTER DENGAN METODE GELOMBANG BERJALAN DIAGRAM KISI BEWLEY Trianto, Ari; Cekdin, Cekmas; Noverianty, Rika
Jurnal Teknik Elektro Vol 10 No 2 (2020): Jurnal Teknik Elektro
Publisher : Program Studi Teknik Elektro Fakultas Teknik Universitas Palembang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (428.58 KB) | DOI: 10.36546/jte.v10i2.416

Abstract

Penelitian ini bertujuan untuk mengevaluasi Tingkat Isolasi Dasar jarak lindung transformator di Gardu Induk Talang Ratu Palembang terhadap penempatan Arester dengan metode gelombang berjalan dan dalam penulisan ini adalah dibatasi hanya mengevaluasi Tingkat Isolasi Dasar jarak lindung transformator di Gardu Induk Talang Ratu Palembang terhadap penempatan Arester dengan metode gelombang berjalan berbasis diagram kisi Bewley. Arester adalah alat pelindung bagi peralatan sistem tenaga listrik terhadap surja petir. Ia berlaku sebagai jalan pintas (by pass) sekitar isolasi. Arester membentuk jalan yang mudah dilalui oleh arus kilat atau petir, sehingga tidak timbul tegangan lebih yang tinggi pada peralatan. Jalan pintas itu harus sedemikian rupa sehingga tidak mengganggu aliran arus dari sistem 50 herz. hasil pembahasan dapat di simpulkan sebagai berikut : 1) Dari data jarak antara penempatan arester dan transformator adalah 300 meter, maka pada jarak ini masih cukup aman arester tersebut untuk melindungi transformator, karena TID transformator 660 kV. 2) Tegangan surya yang timbul dari hasil perhitungan adalah 470,64 kV pada t = 11,38 μ-detik.