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Journal : Techno Jurnal Ilmu Teknik

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

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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

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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

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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

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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.