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All Journal Jurnal Pengabdian Kepada Masyarakat (J-ABDIMAS) ELPOSYS: Jurnal Sistem Kelistrikan Jurnal Teknik Ilmu dan Aplikasi
Rachmat Sutjipto
Politeknik Negeri Malang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Mechanical Engineering

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Pelatihan Pemasangan Instalasi Listrik Tenaga Untuk Masyarakat Binaan Disnaker Di Pemkot Malang Anang Dasa Novfowan; Mochammad Mieftah; Rachmat Sutjipto; Dhimas Kharisma; Sukamdi
Jurnal Pengabdian Kepada Masyarakat (J-ABDIMAS) Vol 9 No 1 (2022): JURNAL PENGABDIAN KEPADA MASYARAKAT 2022
Publisher : Publisher UPT P2M Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jabdimas.v9i1.152

Abstract

Training on the correct, precise and safe installation of electric power installations for the people assisted by the Manpower Office in the Malang City Government. The existence of this training is expected to provide additional skills for installing power installations, to be used in working on installing power installations that are correct and safe and in accordance with standards, so as to minimize work hazards or accidents due to errors due to installation and use.
Studi Penambahan OCR dan GFR Gardu Hubung Gondol untuk Mengurangi Gangguan Meluas Penyulang Banyupoh Asfari Hariz Santoso; Masramdhani Saputra; Rachmat Sutjipto
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (726.906 KB) | DOI: 10.33795/elposys.v9i2.612

Abstract

At the Banyupoh Feeder there is a Gondol Hubung Substation, which has 2 outgoings, the first line goes to the Banyuwedang Feeder and the second line goes to Penyabangan. However, because there is no protection on the outgoing side, if there is a disturbance in the first section on one of the outgoing sides, it will cause 1 feeder with a total of 49 transformers to experience a blackout. To overcome this condition, it is necessary to add relays at the substation. After the addition of relays at the substation, the impedance and short-circuit current are recalculated which can be used to determine the timing of the OCR and GFR relays at the new substation for each outgoing. The calculation results are then converted into a curve to determine the coordination of the protection with the existing protection relays on incoming, outgoing and recloser in anticipating disturbances in the first section at the Banyupoh Feeding Substation. After setting the protection relay on the outgoing side of the substation, the outage area due to interference can be minimized. When section 1 of the Banyuwedang Feeder is disturbed, the relay on the outgoing Gondol Substation will work so that the Energy Not Served (ENS) which was previously 40.008 kWh becomes 20.511 kWh. If section 1 of the Feeding Feeder is disturbed, then the relay on the outgoing Substation Hubung Gondol will work so that the ENS which was previously 40.008 kWh becomes 19,497 kWh, so that the amount of energy that is not channeled is reduced by 50% and this makes the service better.
Analisis Pengaruh Harmonisa Terhadap Losses Transformator 500kVA Rachmat Sutjipto; Wijaya Kusuma; Kemal Zulfianta
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (822.553 KB) | DOI: 10.33795/elposys.v9i2.614

Abstract

With the non-linear load at the State Polytechnic of Malang, it has an impact on the emergence of harmonics and the appearance of currents in the neutral wire, rising temperatures in conductors and losses in transformers.In this study, several THD analyzes were carried out in accordance with the IEEE 519-1992, including neutral current analysis, losses analysis before and after being affected by harmonics, derating analysis and alternative mitigation methods to reduce these harmonic levels. Based on observational data on 500kVA transformers at UPT PP Polinema, it is known that the highest THDi current is 14.5% and exceeds the IEEE 519-1992 standard (12%). As for the THD voltage, the harmonic is 1.87% and is below the standard (5%). Based on the analysis results, it is known that the value of losses from the neutral current is 0.096 kW. It is also known that the total loss is 1.24kW (the PCu loss is 1.2kW and the PFe loss is 0.04 kW. Based on the SPLN 50 standard in 1997, the total allowable losses are 6.6 kW and 7.84 kW after being affected by harmonics, so the total loss of the measurement results is below the standard. From the analysis, it is also known that the derating will occurs in due to harmonics is 71.6 kVA or 14.32% of the transformer capacity. So to reduce the amount of THD current a mitigation is needed in the form of installing a filter that is used to suppress harmonic currents to meet existing standards.
Studi Pengaruh Pembebanan sebagai Dasar Scheduling Maintenance untuk Meminimalisir Susut Umur Transformator 1 GI Blimbing Ahmad Hermawan; Rachmat Sutjipto; Shafira Irmadhani Hidayat; Florentina Berlian Suryaningtyas
Elposys: Jurnal Sistem Kelistrikan Vol. 7 No. 3 (2020): ELPOSYS vol.7 no.3 (2020)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1061.87 KB) | DOI: 10.33795/elposys.v7i3.666

Abstract

Transformer 1’s load in Blimbing Substation has increased significantly each year. In 2016 until 2018 the load on Transformer 1 was 33.81%, 43.53%, and 71.75%. The amount of this transformer’s load will affect the hot spot temparature. Hot spot temperature is also affected by environmental temperature. In this study, load curve method was used then followed by calculate the loss life of transformer. From the calculation, known that the higher of hot spot temperature, the higher impact to loss life of transformer too. In 2018, the highest loading data was on November and it was obtained loss life of transformers by 0.649% per month, so it is estimated that this Transformer 1 at Blimbing Substation has a lifespan of 30 years 9 months. According to IEC 60076-7 normal life of transformers with loading under nominal is 20.55 years or 180000 hours. To minimize loss life of transformer or in other words extend the life time of transformer can be done by scheduling maintenance. Scheduling maintenance is the activity which monitoring the main transmission material on scheduled and provided a treatment based on the monitoring results. It can be concluded that the lifespan of Transformer 1 at Blimbing Substation can exceed the specified standard. The one of factors that affect this, is scheduling maintenance.
Pemasangan Instalasi Listrik Penerangan Untuk Masyarakat Binaan Disnaker di Pemkot Malang Sukamdi; Anang Dasa Novfowan; Mochammad Mieftah; Rachmat Sutjipto; Dhimas Dhesah Kharisma
Elposys: Jurnal Sistem Kelistrikan Vol. 7 No. 3 (2020): ELPOSYS vol.7 no.3 (2020)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (350.265 KB) | DOI: 10.33795/elposys.v7i3.667

Abstract

This study discusses the installation of lighting electrical installations that are appropriate and safe for the community assisted by the Manpower Office in Malang City Government. The existence of this research is expected to provide additional skills in installing lighting installations, to be used in working to install lighting installations that are correct and safe and in accordance with standards, so as to minimize work hazards or accidents due to errors due to installation and use. This research activity was carried out in the AK Building of Malang State Polytechnic, Jalan Soekarno Hatta Malang by Malang State Polytechnic. The research activity for lighting electrical installations was carried out using a direct practice method. These activities are the introduction of standard electrical installation equipment according to PUIL; Introduction of lighting equipment components such as lamps, switches, contact boxes; and Installation of fittings, contact boxes, pipes, cables, switches. From the results of the research which was carried out for several days, the results obtained were knowing the practical theory of lighting installation; know the use of PPE properly; know the components of the lighting installation; know the electric measuring instruments; knowing how to install lighting installation components correctly and safely; know what things are done before the object is connected to a power source; and can take measurements when the object has been connected to a power source.
Analisis Pengaruh Pengaturan Sudut Penyalaan Thyristor Pada Tegangan Eksitasi Terhadap Keluaran Daya Reaktif Generator di PT.PJB PLTU Gresik Unit 3 Rachmat Sutjipto; Ika Noer Syamsiana; Widya Pratiwi Suryaningsih
Elposys: Jurnal Sistem Kelistrikan Vol. 8 No. 3 (2021): ELPOSYS vol.8 no.3 (2021)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v8i3.77

Abstract

In this study, the excitation system used is a static excitation system that uses a transformer and several thyristors connected in a bridge configuration. The excitation system is then implemented on a generator with a capacity of 200 MVA / 15 kV using the MATLAB Simulink R2017b simulation. By using the above circuit, the thyristor ignition angle setting can be adjusted so that it can adjust the excitation voltage and obtain the appropriate excitation current to maintain the stability of the generator output voltage. The simulation was carried out with variations in generator load and using 2 different types of excitation settings. The first setting is to set the thyristor ignition angle to 30° with t=10 ms, at this setting the generator can maintain a stable V out value with a voltage regulation limit of ±5% and the reactive power that can be generated by the generator is +50MVAr and - 40 MVAr. When given a constant excitation at an angle of 35° with t=1 ms, the value of Vout exceeds the expected regulatory limit and the resulting reactive power limit is between +60 MVAr and -100 MVAR where the reactive power does not match the load requirements. This can have an impact on the interconnection system, namely when the reactive power of the generator is greater than the load requirement, the generator with a smaller reactive power will absorb reactive power in the interconnection system and can disrupt the stability of the interconnection network.
ANALISIS KINERJA GENERATOR INDUKSI 3 FASA BERDASARKAN REGULASI TEGANGANNYA Rachmat Sutjipto; Heri Sungkowo; Epiwardi
Jurnal Teknik Ilmu dan Aplikasi Vol. 3 No. 2 (2022): Jurnal Teknik Ilmu dan Aplikasi
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Generator induksi 3 fasa bisa digunakan sebagai generator cadangan dari operasi generator sinkron 3 fasa. Generator induksi 3 fasa dapat dibuat dari motor induksi slip ring 3 fasa atau motor sangkar 3 fasa untuk generator induksi SEIG (Self Excited Induction Generator). Motor induksi slip ring 3 fasa berfungsi sebagai generator induksi setelah belitan rotornya disuplai sumber DC dan diputar menggunakan prime mover, sedangkan pada generator SEIG, tegangan listrik dihasilkan dengan bantuan 3 kapasitor yang terhubung delta. Permasalahan yang muncul dalam pengoperasian adalah timbulnya rugi tegangan saat dilaksanakan variasi pembebanan. Untuk menjawab permasalahan tersebut maka diadakan 3 jenis pengetesan (DC Test, Open Circuit Test dan Load Test) pada kedua generator tesebut. Setelah semua percobaan dilaksanakan dan dianalisa maka diketahui bahwa besarnya tegangan output dari generator induksi 3 fasa dipengaruhi oleh besarnya kecepatan generator dan besarnya arus eksitasi. Proses eksitasi dari kedua generator tersebut berbeda, eksitasi dari generator SEIG ditentukan besar dan jenis hubungan kapasitor eksitasi sedangkan generator induksi lainnya ditentukan oleh besarnya tegangan DC yang disuplaikan ke belitan rotor. Tegangan output dari kedua generator induksi juga dipengaruhi oleh besar dan jenis bebannya. Diketahui pula bahwa generator induksi SEIG mempunyai rugi tegangan dan regulasi tegangan yang lebih besar dikarenakan harga parameter belitannya lebih besar. Untuk menstabilkan tegangan output generator maka dapat dilaksanakan dengan mengatur besarnya arus eksitasi dan kecepatan dari kedua generator induksi tersebut, dengan tetap memperhatikan kemampuan belitan eksitasi dan frekuensi yang dibutuhkan oleh beban serta kesediaan kapasitor untuk generator SEIG.
Co-Authors Ahmad Hermawan Anang Dasa Novfowan Asfari Hariz Santoso Dhimas Dhesah Kharisma Dhimas Kharisma Epiwardi Epiwardi Epiwardi Florentina Berlian Suryaningtyas Kemal Zulfianta Masramdhani Saputra Mochammad Mieftah Shafira Irmadhani Hidayat Sukamdi Sungkowo, Heri Widya Pratiwi Suryaningsih Wijaya Kusuma