Yuli Asmi Rahman
Fakultas Teknik, Jurusan Teknik Elektro, Universitas Tadulako

Published : 9 Documents
Articles

Found 9 Documents
Search

APLIKASI KARAKTERISTIK PENYEARAH SATU FASE TERKENDALI PULSE WIDTH MODULATION (PWM) PADA BEBAN RESISTIF Rahman, Yuli Asmi
SMARTek Vol 9, No 1 (2011)
Publisher : SMARTek

Show Abstract | Original Source | Check in Google Scholar | Full PDF (509.485 KB)

Abstract

Penyearah adalah alat untuk mengubah tegangan bolak balik menjadi tegangan searah.Penerapan penggunaan rectifier dalam industri secara luas sebagai Uninterruptible Power Supply(UPS), pengaturan tegangan konstan, penggerak kecepatan motor, perbaikan faktor daya. Satuphasa terkendali penyearah menggunakan metode Pulse Width Modulation (PWM) adalah salahsatu jenis penyearah yang tegangan keluaran yang dikendalikan dengan perbaikan faktor daya.Eksperimen dilakukan dalam dua kasus variable yaitu, pada beban konstan dengan teganganinput variatif dan variabel beban dengan tegangan masukan konstan.Kedua penelitian menunjukkan bahwa satu phasa terkendali penyearah menggunakan metodePulse Width Modulation (PWM) menjaga tegangan sumber dan ouput akan konstan efektifmeskipun beban variatif
EFEK PENGGUNAAN SCR MOTOR CONTROLLER UNTUK PENINGKATAN EFISIENSI PADA MOTOR INDUKSI TIGA FASA Rahman, Yuli Asmi; Nugraha, Deny Wiria
MEKTEK Vol 8, No 1 (2006)
Publisher : MEKTEK

Show Abstract | Original Source | Check in Google Scholar | Full PDF (576.264 KB)

Abstract

AC Induction motors are sized for maximum load and are operated at a constant full speed, because they are supplied with power from AC lined at a fixed-sinusoidal voltage and fixed frequency. However, load of motor does not always same at many conditions but the input voltage and power of motor is fixed. Of course, it will influence the efficiency of the motor. One method to improve efficiency of the motor is varying the voltage as loaded its and called Motor Controlled. Motor Controlled is AC Drive that using SCR (Silicon Controlled Rectifier) as the output voltage controller by controlling the firing angle. By employing SCR Motor Controller that adjust the voltage of the motor offers advantageous to improve efficiency of motor and potential for significant energy savings.
APLIKASI FILTER PASIF SEBAGAI PEREDUKSI HARMONIK PADA INVERTER TIGA FASE Sunanda, Wahri; Rahman, Yuli Asmi
FORISTEK Vol 2, No 1 (2012)
Publisher : FORISTEK

Show Abstract | Original Source | Check in Google Scholar | Full PDF (631.395 KB)

Abstract

Harmonic is one of sinusoidal components, one wave period from which having multiple frequency of its fundamental frequency one, leading to electrical power quality problems. Harmonic distortion in term of voltage and current ones, generally is due to non linier impedance. Inverter is one of example of it. There are some items that will be measured. There are value of harmonic at  source and value of voltage and current harmonic when inverter does not have any load. IEEE Standard of 519-1992 as a reference in determining maximum limitation voltage and current harmonics. The result of the tests were showed that voltage harmonic distortion at inverter did not exceed the IEEE 519-1992 maximum limitation of 5%. While current harmonic distortion had exceed the maximum limitation of the IEEE 519-1992. The highest results were exceeding 57,52 % when inverter does not have any load. After using passive filter that function for reducing the value of harmonic,  the total harmonic distortion (THD) current w only 6,837%  when inverter does not have any load.   Keywords : Voltage, Current, Harmonic Distortion, Passive Filter.
WATAK HARMONIK PADA BEBAN NON LINIER INVERTER Sunanda, Wahri; Rahman, Yuli Asmi
FORISTEK Vol 1, No 1 (2011)
Publisher : FORISTEK

Show Abstract | Original Source | Check in Google Scholar

Abstract

Harmonic is one of sinusoidal components, one wave period from which having multiple frequency of its fundamental frequency one, leading to electrical power quality problems. Harmonic distortion in term of voltage and current ones, generally is due to non linier impedance. Inverter is one of example of it. There are some items that will be measured. There are value of harmonic at  source and value of voltage and current harmonic when inverter does not have any load. IEEE Standard of 519-1992 as a reference in determining maximum limitation voltage and current harmonics. The result of the tests were showed that voltage harmonic distortion at inverter did not exceed the IEEE 519-1992 maximum limitation of 5%. While current harmonic distortion had exceed the maximum limitation of the IEEE 519-1992. The highest results were exceeding 56,55 % when inverter does not have any load. Keywords : Voltage, Current, Harmonic Distortion, Inverter.
SISTEM DETEKSI DINI BANJIR BERBASIS SENSOR FLOAT MAGNETIC LEVEL GAUGE -, Fahrul, Miranti, Ambo Asse; Rahman, Yuli Asmi
FORISTEK Vol 3, No 2 (2013)
Publisher : FORISTEK

Show Abstract | Original Source | Check in Google Scholar

Abstract

Central Sulawesi has tropical climate conditions with interconnected rivers caused each of it can experience the impact of the sudden rise of water levels if there is a heavy rainfall in upstream areas which is commonly called “a sent flood”. Therefore, it is needed an early detector flood tool that works based on the height of river water level so that the impact of floods can be minimized. Early detector flood tool can function automatically by giving early warning when water levels reach a certain limit. The detector of height levels of river streams is designed using float magnetic level gauge method. This height level of river streams detector is able to provide information in real time based on the height level of river streams by giving information in the form of warning light indicator and siren alarm as alert and danger sign. Key words: detector, early, flood, float, magnetic.
WATAK HARMONIK PADA INVERTER TIGA FASA TAK BERBEBAN Sunanda, Wahri; Rahman, Yuli Asmi
FORISTEK : Forum Teknik Elektro dan Teknologi Informasi Vol 1, No 1 (2011)
Publisher : FORISTEK : Forum Teknik Elektro dan Teknologi Informasi

Show Abstract | Original Source | Check in Google Scholar | Full PDF (1067.641 KB)

Abstract

AbstractHarmonic is one of sinusoidal components, one wave period from whichhaving multiple frequency of its fundamental frequency one, leading toelectrical power quality problems. Harmonic distortion in term of voltageand current ones, generally is due to non linier impedance. Inverter is one ofexample of it. There are some items that will be measured. There are value ofharmonic at source and value of voltage and current harmonic when inverter does not have any load. IEEE Standard of 5191992 as a reference in determining maximum limitation voltage and current harmonics. The result of the tests were showed that voltage harmonic distortion at inverter did not exceed the IEEE 5191992 maximum limitation of 5%. While current harmonic distortion had exceed the maximum limitation of the IEEE 5191992. The highest results were exceeding 56,55 % when inverter does not have any load.Keywords: Voltage, Current, Harmonic Distortion, Inverter.
EVALUASI SETTING DISTANCE RELAY PADA SUTT 150 KV ANTARA GI PAMONA – GI SIDERA Adrianto, J; Sarjan, Muhammad; Rahman, Yuli Asmi
FORISTEK : Forum Teknik Elektro dan Teknologi Informasi Vol 6, No 1 (2016)
Publisher : FORISTEK : Forum Teknik Elektro dan Teknologi Informasi

Show Abstract | Original Source | Check in Google Scholar

Abstract

A short circuit is a common fault of overhead lines. In 2015, short circuit caused by surge lighting and fallen trees, occurred four times in transmission line connected PamonaSiderasubstation. In securing transmission line, distance relay should be applied as the primery protection. However, incorrect setting of relay may readily lead to relay failure to protect the line. Therefore, evaluation of relay setting is crucial. The purpose of this paper is to evaluate the setting of distance relay that was installed at Pamona and Sidera substation. Furthermore, calculation of curent fault and impedance of short circuit was done by intervering fault to the line connected Pamona and Sidera substation in matlab. The method used is simulation using matlab application. The result shows that the highest short circuit current obtained at 25% of the length of Pamona-Sidera transmission line, 6203.47A. The smallest short circuit current was 1255,86A, occurred at 100% of the Keyword : Short Circuit, Distance Relay, Transmission line
EVALUASI JARINGAN TEGANGAN MENENGAH SISTEM KELISTRIKAN KAMPUS UNIVERSITAS TADULAKO MENGGUNAKAN ETAP 7.5.0 Santiyasa, I Nyoman; Sarjan, Muhammad; Rahman, Yuli Asmi
FORISTEK : Forum Teknik Elektro dan Teknologi Informasi Vol 4, No 2 (2014)
Publisher : FORISTEK : Forum Teknik Elektro dan Teknologi Informasi

Show Abstract | Original Source | Check in Google Scholar

Abstract

Electricity is a secondary energy form that is generated, transmitted and distributed for all kinds of purposes. Tadulako University Campus an electricity consumer with considerable power and continue their development rapidly. Because of the construction, the electrical load is also increasing, the medium-voltage network as one of the components of the power system needs to be evaluated in order to serve the load capacity continuously. Electrical power is supplied from distribution transformers to user have voltage loss and power losses. Because the distribution network has resistance, inductance, and capacitance. The energy lost already appeared from the generation system. This study was conducted by analyzing model of the single line diagram with input medium voltage-network Tadulako University campus data in ETAP 7.5.0 application. From the analysis, there were losses in the medium voltage network Tadulako University Campus at 1.358% with 0.39% voltage drop at the existing load. Keywords : Electricity, Losses, Drop Voltage, Medium Voltage Networks, ETAP
PELUANG HEMAT ENERGI LISTRIK PADA GARDU FISIP KAMPUS UNIVERSITAS TADULAKO Siregar, Restu Ary Winata; E, Darmawan; Mukhlis, Baso; Rahman, Yuli Asmi
FORISTEK : Forum Teknik Elektro dan Teknologi Informasi Vol 6, No 1 (2016)
Publisher : FORISTEK : Forum Teknik Elektro dan Teknologi Informasi

Show Abstract | Original Source | Check in Google Scholar

Abstract

The use of electrical energy in University is an absolute and unavoidable. Based on data obtained, every year Tadulako University experienced a high increase in electrical energy consumption. The electricity bills of Tadulako University based on data 8 months from January to August 2015 reached Rp.2.567.411.878 that is in average of payment per month of Tadulako University is Rp.322.051.485.At the substation of FISIP electricity usage in January through August 2015 was highest in June reaching 61.750 kWh to the cost of electricity bill as big as Rp.55.575.000. Electric energy audit begins with the historical data collection of electricity biil in the last three years such as : the substation of FISIP on January to August, the data load of electrical equipment, and the spacious rooms supplied. The intensity of energy consumption and the energy-saving opportunities were counted from each supplied rooms of substation FISIP. The result of the calculation of the intensity of energy consumption in detail can be seen throught 160 total rooms if the energy-saving opportunity of 49 rooms is implemented. Therefore, Tadulako University can save the cost of electricity by Rp.30.140.900,73 per month. Keywords : Electrical Energy Audit, Energy Consumption Intensity, Energy Saving Opportunities, Efficiency, Substation FISIP, Tadulako University