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Optimasi Penempatan dan Kapasitas PLTS on grid Pada Sistem Distribusi Radial Menggunakan Metode Algoritma Genetika Multi Konstrain Muammar Zainuddin; Haditsah Annur
Jurnal Rekayasa Elektrika Vol 15, No 1 (2019)
Publisher : Universitas Syiah Kuala

The photovoltaic grid-connected business opportunity offers challenges to power quality and voltage fluctuations in the distribution system. The purpose of this study is to optimize the location and power capacity of the grid-connected photovoltaic so that the voltage values are in accordance with the operating standards and meet the requirements of the connection techniques in the distribution system. The distribution system tested is the 69 Buses radial distribution feeder. The optimization uses three constraints namely voltage constraints, active power capacity constraints and total active power capacity constraints of the Grid-Connected Photovoltaic. The Optimization is carried out by considering the value of the percentage of the total active power of the Grid-Connected Photovoltaic capacity to the total load in the distribution system. The optimization results in the first simulation indicated seven grid locations with a total active power of 1.156 MW (38% PV) and produced a fitness value of 0.029. The second Simulation showed 7 locations with a total active power of 1.243 MW (41% PV) and produced a fitness value of 0.023. The Third simulation was identified with 11 locations with a total active power of 1.385 MW (46% PV) and produced a fitness value of 0.022. The best fitness value is the lowest value of the active power losses. The entry of a number of the Grid-Connected Photovoltaic System with distributed location can increase the voltage level in the distribution system.

Analisa Masuknya Gardu Induk Anggrek dan Rekonfigurasi Jaringan Terhadap Kualitas Tegangan dan Rugi-rugi Daya (Studi Kasus PLN Rayon Kwandang Area Gorontalo) Muammar Zainuddin; Luthfi Wiraputra
Jurnal Rekayasa Elektrika Vol 12, No 3 (2016)
Publisher : Universitas Syiah Kuala

The quality of the overhead distribution voltage with a length of ± 190,57 kms, in the North Gorontalo district has not met the National Standard for the distribution voltage yet. This causes a voltage drop along the distribution line at 21% during the peak load and the power loss at 219 kW. This paper aims to find the best solution for improving the voltage quality of the distribution line to meet the standard operation voltage for the medium distribution line. The Newton-Raphson method is used to analyze the power flowing along the distribution line and the voltage at their buses. There are three scenarios purposed in this study. The first scenario is to uprate the conductor size (in LK. 01 feeder), the second scenario is to reconfigure the distribution network after the Anggrek Substation was connected to the system and the third scenario is to combine the first and the second scenarios, i.e. uprating conductors and reconfiguring the network. From the three scenarios, the results show that the first scenario has a voltage drop of 19,8%, the second scenario causes a voltage drop of 8,8% and the third scenario produces the voltage drop of 4,8%. Based on this results, it can be concluded that the third scenario can improve the line voltage much better than the other two scenarios with the power loss of up to 52,4 kW. The Entry of Anggrek Substation must accompany by conductor uprating in line distribution to reach limit voltage standard operation.

Reactive power control of solar photovoltaic inverters for grid code compliance support Muammar Zainuddin; Frengki Eka Putra Surusa; Muhammad Asri; Aprian Mokoagow
International Journal of Applied Power Engineering (IJAPE) Vol 12, No 3: September 2023
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijape.v12.i3.pp300-311

The compensation of reactive power in smart inverters is one solution to address the issue of voltage violations in the distribution network due to the penetration of solar photovoltaic power generation. However, options for reactive power control are limited during variations in irradiation and daily load on the feeder. This study aims to investigate the performance difference between four reactive power control techniques including Q(V) control, Q(P) control, fixed Q-Var, and fixed power factor (PF) available in smart inverters to reduce voltage violations due to PV integration and comply with the grid-code. Three-phase balanced power flow was simulated in a medium voltage distribution network (MVDN) considering the reactive power control mode of the inverter under variations in solar radiation and daily load. The results showed that the Q(V) control was more effective in improving distribution feeder voltage than other techniques and showed its compliance with the grid-code. The limiting setting point for var injection or power factor limit should be proportional to the daily grid load profile.

Optimasi Penempatan dan Kapasitas PLTS on grid Pada Sistem Distribusi Radial Menggunakan Metode Algoritma Genetika Multi Konstrain Muammar Zainuddin; Haditsah Annur
Jurnal Rekayasa Elektrika Vol 15, No 1 (2019)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v15i1.12507

The photovoltaic grid-connected business opportunity offers challenges to power quality and voltage fluctuations in the distribution system. The purpose of this study is to optimize the location and power capacity of the grid-connected photovoltaic so that the voltage values are in accordance with the operating standards and meet the requirements of the connection techniques in the distribution system. The distribution system tested is the 69 Buses radial distribution feeder. The optimization uses three constraints namely voltage constraints, active power capacity constraints and total active power capacity constraints of the Grid-Connected Photovoltaic. The Optimization is carried out by considering the value of the percentage of the total active power of the Grid-Connected Photovoltaic capacity to the total load in the distribution system. The optimization results in the first simulation indicated seven grid locations with a total active power of 1.156 MW (38% PV) and produced a fitness value of 0.029. The second Simulation showed 7 locations with a total active power of 1.243 MW (41% PV) and produced a fitness value of 0.023. The Third simulation was identified with 11 locations with a total active power of 1.385 MW (46% PV) and produced a fitness value of 0.022. The best fitness value is the lowest value of the active power losses. The entry of a number of the Grid-Connected Photovoltaic System with distributed location can increase the voltage level in the distribution system.

Analisa Masuknya Gardu Induk Anggrek dan Rekonfigurasi Jaringan Terhadap Kualitas Tegangan dan Rugi-rugi Daya (Studi Kasus PLN Rayon Kwandang Area Gorontalo) Muammar Zainuddin; Luthfi Wiraputra
Jurnal Rekayasa Elektrika Vol 12, No 3 (2016)
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17529/jre.v12i3.4234

The quality of the overhead distribution voltage with a length of ± 190,57 kms, in the North Gorontalo district has not met the National Standard for the distribution voltage yet. This causes a voltage drop along the distribution line at 21% during the peak load and the power loss at 219 kW. This paper aims to find the best solution for improving the voltage quality of the distribution line to meet the standard operation voltage for the medium distribution line. The Newton-Raphson method is used to analyze the power flowing along the distribution line and the voltage at their buses. There are three scenarios purposed in this study. The first scenario is to uprate the conductor size (in LK. 01 feeder), the second scenario is to reconfigure the distribution network after the Anggrek Substation was connected to the system and the third scenario is to combine the first and the second scenarios, i.e. uprating conductors and reconfiguring the network. From the three scenarios, the results show that the first scenario has a voltage drop of 19,8%, the second scenario causes a voltage drop of 8,8% and the third scenario produces the voltage drop of 4,8%. Based on this results, it can be concluded that the third scenario can improve the line voltage much better than the other two scenarios with the power loss of up to 52,4 kW. The Entry of Anggrek Substation must accompany by conductor uprating in line distribution to reach limit voltage standard operation.

Analisis Pelepasan Beban (Load Shedding) Menggunakan Under Frekuensi Relay (UFR) Pada Sistem Transmisi Gardu Induk (GI) Gorontalo Baru 150 Kv irfan, irfan haerullah; Zainuddin , Muamar; Pratiwi, Amelya Indah
Jurnal Electrichsan Vol. 12 No. 02 (2023): November 2023
Publisher : Program Studi Teknik Elektro Universitas Ichsan Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37195/electrichsan.v12i2.590

Penelitian ini bertujuan untuk menganalisis pemodelan system simulasi pelepasan beban. Dalam penelitian ini, metode yang digunakan yakni pendekatan kuantitatif dimana pengumpulan data dilakukan dengan studi literatur, observasi, dan wawancara langsung di kantor ULTG Gorontalo baru. Metode analisis perhitungan dan simulasi pelepasan beban menggunakan software Digsilient 15.1 Simulasi yang dilakukan yakni lepasnya pembangkit PLTU tajung karang. dan pelepasan beban yang di lepas yaitu GI A1, GI IS2, GI GB Simulasi skenario lepasnya generator PLTU tajung karang diperoleh daya generator yang terlepas sebesar 48 MW yang mengakibatkan penurunan frekuensi dilakukan tahap – tahap pelepasan beban diantaranya tahap 1 dan tahap 2 tahap 3 perhitungan, waktu pelepasan yang dibutuhkan relay sebesar 1/20s dengan frekuensi pelepasan beban tahap 1 sebesar 48,5737Hz dan besar beban yang dilepaskan 1,3944MW. tahap 2 sebesar 48,366????Z beban yang dilepaskan 1,3911 MW tahap 3 sebesar 48,2766Hz besar beban yang dilepaskan 1,340 MW. Setelah dilakukan pelepasan beban frekuensi berhasil naik hingga mencapai keadaan stabil 50.20 Hz. Sehingga dari simulasi ditemukan bahwa metode perhitungan untuk pelepasan beban yang digunakan lebih optimal dan berhasil mengembalikan ke batas standar yang diinginkan.

Analisis Gangguan Hubung Singkat Pada Sistem Kelistrikan PT HARVEST Gorontalo Indonesia Menggunakan Software ETAP 19.0.1: arus gangguan hubung singkat, simetris, asimetris, sistem proteksi. Rifal, Rifaldi polapa; Zainuddin, Muammar; Humena, Steven
Jurnal Electrichsan Vol. 13 No. 1 (2024): Mei2024
Publisher : Program Studi Teknik Elektro Universitas Ichsan Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37195/electrichsan.v13i1.848

ABSTRACT RIFALDI POLAPA. T2119008. ANALYSIS OF SHORT CIRCUIT FAULTS IN PT HARVEST GORONTALO INDONESIA'S ELECTRICAL SYSTEM USING ETAP 19.0.1 SOFTWARE PT Harvest Gorontalo Indonesia is an internationally standardized pharmaceutical company. The main activity of this company is the processing of herbal medicine with quality maintenance. To meet production targets, a power supply of 866 kVA is used which is connected to several supporting busbars. In the distribution of electric power, it is certainly inseparable from various kinds of faults, including symmetric and asymmetric short circuit faults. The purpose of this research is to calculate the contribution value of the short circuit current at the load bus and ensure that the system protection performance works properly. This research is begun by calculating manually and then compared with the ETAP 19.0 software with a calculation difference of 0.969. Short circuit current calculations are performed on the bus that represents each network, namely the 3 LVMDP buses closest to the source, the 4 HVAC buses between the source and the load, and the 4 AHU buses closest to the load. Based on the calculation results the short circuit current L-L-L is higher than all types of existing faults. Especially the fault on the 3 LVMDP bus which is closest to the source, namely 28.844 kA. In addition, the magnitude of the short circuit current on the AHU load bus is 4,220 kA for L-L-L, 3,861 kA for L-L-G, 3,666 kA for L-L, and 2,341 kA for L-G. Based on the ETAP simulation results, in general, the currently installed protection system still shows good coordination. It is shown in the performance of CB HVAC and CB Main Production capable of breaking at a Rage of 60-120ms before CB LVMDP works. Keywords: short circuit fault current, symmetrical, asymmetrical, protection system ABSTRAK RIFALDI POLAPA. T2119008. ANALISIS GANGGUAN HUBUNG SINGKAT PADA SISTEM KELISTRIKAN PT HARVEST GORONTALO INDONESIA MENGGUNAKAN SOFTWARE ETAP 19.0.1 PT Harvest Gorontalo Indonesia merupakan perusahaan farmasi yang telah terstandarisasi internasional. Perusahaan ini memiliki kegiatan utama yaitu pengolahan jamu herbal yang terjaga mutu dan kualitasnya. Untuk memenuhi target produksi, suplay daya digunakan sebesar 866 kVA yang terhubung pada beberapa busbar penunjang. Dalam pendistribusian tenaga listrik tentu tidak terlepas dari berbagai macam gangguan, diantaranya adalah gangguan hubung singkat simetris dan asimetris. Tujuan dari Penelitian ini adalah menghitung nilai kontribusi arus hubung singkat pada bus beban dan memastikan kinerja proteksi sistem bekerja dengan baik. Penelitian ini dimulai dengan menghitung manual kemudian dibandingkan dengan software Etap 19.0 yang memiliki selisih perhitungan sebesar 0,969. Perhitungan arus hubung singkat dilakukan pada bus yang mewakili setiap jaringan yaitu bus 3 LVMDP terdekat dengan sumber, bus 4 HVAC berada antara sumber dan beban serta bus 4 AHU terdekat dengan beban. Dari hasil perhitungan arus hubung singkat L-L-L lebih tinggi dari seluruh jenis gangguan yang ada. Terutama gangguan pada bus 3 LVMDP yang terdekat dengan sumber yaitu sebesar 28,844 kA. Selain itu, besar arus hubung singkat yang dirasakan pada bus beban AHU berturut-turut adalah 4,220 kA untuk L-L-L, 3,861 kA untuk L-L-G, 3,666 kA untuk L-L, dan 2,341 kA untuk L-G. Berdasarkan hasil simulasi Etap secara umum sistem proteksi yang terpasang saat ini masih menunjukkan koordinasi yang baik. Hal ini ditunjukkan pada kenerja CB HVAC dan CB INDUK R PRODUKSI mampu memutus pada rage 60-120 ms sebelum CB LVMDP bekerja. Kata Kunci: arus gangguan hubung singkat, simetris, asimetris, sistem proteksi

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