Articles

Found 16 Documents
Search

Studi Potensi Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) Di Aliran Sungai Desa Kejawar Banyumas

Dinamika Rekayasa Vol 15, No 1 (2019): Dinamika Rekayasa - Februari 2019
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1049.262 KB)

Abstract

Desa Kejawar memiliki sumberdaya air yang dapat dimanfaatkan sebagai pembangkit listrik tenaga mikro hidro (PLTMH). Ketersediaan mercu bendung saluran pembawa, dan bak pengendap menjadi faktor utama diadakannya penelitian ini. Metode yang digunakan dalam pengumpulan data primer berupa head yaitu dengan pengukuran langsung di lokasi perencanaan pembangunan PLTMH dan didapatkan hasil pengukuran head efektif setinggi 3,08m. Pengumpulan data sekunder berupa curah hujan, iklim, dan DAS sebagai perhitungan untuk debit andalan diperoleh hasil 0,05 ????3/????. Kapasitas daya dalam perencanaan pembangunan PLTMH ini sebesar 1,36 kW. Berdasarkan simulasi menggunakan aplikasi TURBNPRO 3.0 turbin yang digunakan bertipe kincir dan alternator 3 kW. Total investasi yang dibutuhkan dalam perencanaan pembangunan PLTMH sebesar Rp. 31.699.531 dengan umur proyek selama 10 tahun. Kelayakan proyek perencanaan pembangunan PLTMH diperoleh nilai NPV pada discount factor 10% sebesar Rp. 37.063.244>0, BCR sebesar 2,1>1, PP selama 3,46 tahun < 10 tahun, IRR pada discount factor 34% sebesar 33,6%. Berdasar pada evaluasi proyek, dapat dikatakan perencanaan pembangunan PLTMH di aliran sungai Desa Kejawar layak dilakukan

Studi Pemberdayaan Lembaga Pengelola Jaringan Irigasi di Tingkat Desa

Jurnal Teknik Pengairan Vol 1, No 1 (2010)
Publisher : Jurusan Teknik Pengairan, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Original Source | Check in Google Scholar

Abstract

Dalam rangka menuju kemandirian dan ketahanan pangan ,maka pemerintah berupaya untukmeningkatkan produksi beras dan taraf hidup petani sehingga diperoleh manfaat penghematan devisa nasionaldan membuka kesempatan kerja serta mengurangi kemiskinan. Tujuan dan manfaat studi adalah penyusunansrtategi dan kebijakan pemberdayaan Lembaga Pengelola Jaringan Irigasi di tingkat desa dan sebagai pedoman untuk meningkatkan keberadaan HIPPA sebagai lembaga pengelola jaringan irigasi yang mandiri dalam pengelolaan maupun pemeliharaan jaringan irigasi . Metode yang dipergunakan adalah analisis SWOT untukmenentukan Strategi kebijakan pemberdayaan HIPPA. Hasil studi menunjukkan bahwa keberhasilan pemberdayaan HIPPA diperlukan strategi dan kebijakan sebegai berikut : organisasi HIPPA harus berbentuk badan hukum, pemerintah sebagai fasilitator, motivator, mengadakan kerja sama pengelolaan, menyediakan tenaga pendamping, menyediakan sarana produksi dan memfasilitasi pembentukan koperasi serba usaha.Kata kunci : Pemberdayaan, irigasi, HIPPA

PROTOTIPE GENERATOR MAGNET PERMANEN AXIAL AC 1 FASA PUTARAN RENDAH SEBAGAI KOMPONEN PEMBANGKIT LISTRIK TENAGA PIKO HIDRO

Techno Jurnal Ilmu Teknik Vol 15, No 2 (2014): Jurnal Techno Volume 15 No.2 Oktober 2014
Publisher : UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

Pada penelitian ini dirancang sebuah prototipe generator magnet permanen aksial AC 1 fasa. Generator magnet permanen dipilih karena tidak memerlukan arus eksitasi DC serta sistem pemeliharaan yang relatif mudah. Jenis magnet permanen yang digunakan adalah NdFeb (Neodymium-Iron-Boron). Generator yang dirancang bertipe double sided coreless stator. Hasil pengujian diperoleh tegangan rms sebesar 12,13 volt dengan frekuensi 50,2 Hz pada pengujian tanpa beban dan 11,93 volt dengan frekuensi 50,1 Hz pada pengujian berbeban. Beban yang digunakan yaitu 3 buah lampu pijar 24 volt 125 mA terhubung paralel. Kata kunci : PLTPH, Generator, aksial, 1 fasa dan NdFeb

ANALISA PERANCANGAN FILTER PASIF UNTUK MEREDAM HARMONIK PADA INSTALASI BEBAN NONLINEAR

Techno Jurnal Ilmu Teknik Vol 13, No 1 (2012): Jurnal Techno April 2012
Publisher : UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

Non-linear loads increasing on a power system results in harmonic distortion (THD) increasing. Harmonic distortion increasing getting bad influences on power system components. Measurement at one of PLNs customer installations with many non-linear loads shows the amount of voltage THD 9.41% and current THD 15.05%. To reduce the harmonic distortion we can use harmonic filters. The filter designed is a single-tunned passive filter. The design of harmonic filters adapted to the dominant order occured. Filters are not only used to reduce harmonic distortion occurred but also increase power factor. From the simulation results that by installing a single-tunned passive filters on the system, voltage THD has decreased from 9.41% to 6.61% while the current THD decreased from 15.05% to 10.40%. Meanwhile, system power factor increased from 0.971 to 0.992.Keywords: Total Harmonic Distortion, Passive Filter, Nonliear Load

ANALISIS PENGARUH UNBALANCE UNDER VOLTAGE DAN UNBALANCE OVER VOLTAGE TERHADAP KINERJA MOTOR INDUKSI TIGA FASA

Techno Jurnal Ilmu Teknik Vol 14, No 2 (2013): Jurnal Techno Oktober 2013
Publisher : UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

Studi ini membahas pengaruh unbalance under voltage (UBUV) dan unbalance over voltage (UBOV) sesuai standar NEMA MG-I 2003 terhadap kinerja motor induksi tiga fasa dengan analisis menggunakan perhitungan metode komponen simetris untuk mengetahui parameter-parameter analisis operasi motor induksi saat steady state diantaranya yaitu karakteristik arus, rugi-rugi daya, efisiensi, dan torsi motor induksi serta simulasi kecepatan putaran motor. Penelitian ini hanya sebagai studi teori dan pemodelan simulasi menggunakan software PSIM Profesional 9.0.3.400 dengan objek penelitian data tegangan tiga fasa yang tidak seimbang pada pelanggan industri PT. PLN dan motor induksi tiga fasa di laboratorium energi Teknik Elektro, Universitas Jenderal Soedirman. Hasil penelitian menunjukkan pada motor induksi 0,5 HP ketika terjadi UBUV dengan persentase 1,103% terjadi ketidakseimbangan arus 6,1%, rugi-rugi daya meningkat 6,22%, efisiensi menurun 3,19%, torsi menurun 7,53% dan kecepatan putaran menurun 0,386%. Sedangkan ketika terjadi UBOV dengan persentase 1,026% terjadi ketidakseimbangan arus 5,65%, rugi-rugi daya meningkat 22,82%, efisiensi menurun 2,96%, torsi meningkat 8,01% dan kecepatan putaran meningkat 0,165%.Kata kunci: UBUV, UBOV, NEMA MG-I 2003, metode komponen simetris, motor induksi tiga fasa.

REKONFIGURASI JARINGAN DISTRIBUSI 20 KV UNTUK PERBAIKAN PROFIL TEGANGAN DAN SUSUT DAYA LISTRIK

Techno Jurnal Ilmu Teknik Vol 11, No 2 (2010): Jurnal Techno Oktober 2010
Publisher : UMP

Show Abstract | Original Source | Check in Google Scholar

Abstract

 This study was conducted to evaluate the voltage profile and decrease the electric power, main feeder 20 kV distribution system of Kalibakal Substation (GI Kalibakal). Evaluation refers to the standard PT. PLN (Persero) SPLN 72: 1987 about the specification and design to JTM and JTR and SPLN 10-1A: 1996 percentage losses tolerance is ± 10% of the power delivered. Evaluation results used as the basis for improved simulation voltage drop and  power losses with a network reconfiguration method. Potential re-configuration is determined by looking at the voltage profile and power losses in each configuration feeder and around feeder nearest feeder that will be reconfiguration. Simulation is done using the tools ETAP power station to analyze the power flow the main feeder of GI Kalibakal.The first simulation assuming GI Kalibakal voltage of 20 kV as the voltage rating of medium voltage distribution system. The result is that the voltage profile, 92.66%  in feeder 5 and 94.62% in feeder 6  under standard. With the GI Kalibakal boost to the 20.5 kV, voltage profile feeder 5 rose to 95.29% and feeder be 97.21% 6. So by increasing the voltage GI Kalibakal from 20 kV to 20.5 kV voltage profile already meet the standards.From the simulation with the GI Kalibakal voltage 20.5 kV, losses that occur in all feeder under 10% which means meet with the standard, the largest losses in feeder 5 for 2.81%. Losses had to be suppressed as small as possible in this case performed by a network reconfiguration that can be done without investment. Reconfiguration is done by involving feeder 2, 3, 5 and 6 with total losses before the reconfiguration is 401 kW. After a reconfiguration of the steps:1. Three sections with a value of voltage on the marginal area (section 5_8, section5_9     and 5_10) feeder delegated to section 6 through 6_8, 2. Section 6_11 and 6_12 section feeder transferred to section 3 through 3_6, 3. Section 5_8, 5_9 and 5_10 its section 6_8, 6_9 and 6_10 delegated to feeder section 2    through 2_6, total losses feeder 2,3,5 and 6 to 290 kW, so there is a decrease losses of 401-290 = 111 kW. Key word : Reconfiguration, voltage profile, losses. 

Penentuan Pembebanan Maksimum Transformator Daya Yang Menyuplai Personal Computer (PC)

Dinamika Rekayasa Vol 5, No 2 (2009): Dinamika Rekayasa - Agustus 2009
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (190.7 KB)

Abstract

Personal computer is electronic equiment that use solid state device, such as rectifiers, so it to be source of harmonic current. Harmonic current is sinusoidal current with multiple frequency of fundamental current which will be increase power losses because increasing effective current and frequency. In electric distribution system, transformer is component with highest power losses. They are consit of DC losses (Pdc) that influence by effective current, eddy current (PEC) and other stray losses (POSL) which influence by effective current and their frequency. This study involved increasing transformer power losses with assume that transformer supply in full load condition to personal computer. Analyzes following IEEE Std. C57.110-1998 with comparing determination maximum transformer loading use current spectrum from spectrum analyzer equipment and conversion produce Mathlab from current wave time domain to current wave frequency domain. The result are maximum transformer loading is 97,84 use spectrum analyzer and 97,84 use Mathlab sofware.

Optimasi Operasi Pembangkit Listrik Tenaga Air (PLTA) Menggunakan Linear Programming Dengan Batasan Ketersediaan Air

Dinamika Rekayasa Vol 9, No 2 (2013): Dinamika Rekayasa - Agustus 2013
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (434.379 KB)

Abstract

One of hydro power plant operational problem is how to maximize available water resouces to gather optimal electric power generation. Water availability which is limited and can be stored in a reservoir will influence electrical energy generated by the plant. This paper present a new approach of short term optimization of hydro power plant operation. The objective function is to maximize energy which is produced by power plant on scheduling operation period, with consider water resource availability in reservoir as operational constraint. The optimization problem is formulated in Linear Programming Method, in which this method is a commonly used to solve optimization problem in hydro power plant. Based on simulation results on Ketenger Hydro Power Plant using water flow data on June 1st 2013 shows that this method can be used to solve hydro power plant operation optimization problem well. Electrical energy as main objective function is maximized and all prevailing constrain is satisfied. On this short term operation (24 hour) simulation, total energy can be produced is 96121,55 kWh, or 1427 kWh (1,51%) greater comparing with real generation condition with 96694 kWh.

Analisis Kerja Rele Overall Differential pada Generator Unit I PLTA Ketenger PT Indonesia Power UBP Mrica

Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (2732.64 KB)

Abstract

Plant has two important equipment that are the generator and transformer. Therefore, it should be protected well by the overall differential relay. This relay must be reliable from the disturbances that might arise. In this study a simulation was conducted to obtain and test the overall differential relay setting at generator unit 1 PLTA Ketenger. Modelling was done with MATLAB Simulink 7.0.1 to check the overall differential relay protection system from potentialproblems. The model was given several disturbances, namely 1) short circuit fault in the security area, 2) short circuit fault outside the security area, and 3) lightning disturbances when damaged arrester. From the simulation results, the overall differential relay operating current is 1.73 A (primary side) and 1.64 A (secondary side). The results show that the overall differential relay provides a good response, except in the lightning fault with a current above 9x109 A (going the mismatch). For handlingthis problem another arrester should be added.

Generator Magnet Permanen Sebagai Pembangkit Listrik Putaran Rendah

Dinamika Rekayasa Vol 8, No 2 (2012): Dinamika Rekayasa - Agustus 2012
Publisher : Jenderal Soedirman University

Show Abstract | Original Source | Check in Google Scholar | Full PDF (425.176 KB)

Abstract

Development renewable energy as electrical energy need to be followed by provision of low speed generator, especially for small-scale use of alternative energy. This study discusses the design of low speed synchronous generator using permanent magnets for producing magnetic flux in the rotor. Stator coils are designed so that on the rotation of 500 rpm generator can produce 5 watts output power at 3 phase voltage 12 Vac.