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All Journal ELKHA : Jurnal Teknik Elektro Jurnal Ilmiah Teknik Elektro

Amien Rahardjo

Universitas Indonesia

Author-ID : 3199969

Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering

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Articles

Impact of 5 MWp Solar Power Plant Interconnection on Power Flow and Short Circuit Interruption in the 20 kV Medium Voltage Network at Area X Power System Hanindito Titah Prameswara; Amien Rahardjo; Nadyanti Larasati; Faiz Husnayain
Jetri : Jurnal Ilmiah Teknik Elektro Jetri, Volume 18, Nomor 1, Agustus 2020
Publisher : Website

One example of the application of new renewable energy that is currently developing is solar power plant. Based on data from Rencana Usaha Penyediaan Tenaga Listrik (RUPTL) PT PLN (Persero) 2019-2028, it is stated that the potential of solar energy in Indonesia is 207,898 MW (4.80 kWh / m2 / day) and only 78.5 MW of capacity installed in Indonesia. In this study, a 5 MWp solar power plant was interconnected with a 20 kV medium-voltage network of Area X as one of the renewable energy applications in Indonesia. Interconnection studies include power flow analysis and three phase short circuit fault analysis. In the analysis of the power flow results obtained that the Solar Power Plant system is capable of supplying the load requirements to the system of 5,000 kW active power. It was also found that interconnection of solar power plant with the system resulted in an increase in the voltage level of each bus in the system by 0.08 to 1.41%, as well as changing the percentage of component loading by 0.01% -93.01%. The results of the three-phase short-circuit fault analysis show that the interconnection of the solar power plant system has a short-circuit fault current value of 5.70-7.01 kA, so the fault current value for the whole bus is still far below the value of the short-circuit current capacity of the protection system's short circuit worth 25 kA. The results of the interconnection study showed that interconnection of a 5 MWp solar power plant system with a 20 kV medium voltage network Area X can be carried out.

Analisis Karakteristik Busur Api Listrik Pada Tegangan Rendah Arus Searah (DC) Dipengaruhi Oleh Resistansi Konduktor Anjar Bryantiko Pangestu; Faiz Husnayain; Amien Rahardjo
Jetri : Jurnal Ilmiah Teknik Elektro Jetri, Volume 18, Nomor 1, Agustus 2020
Publisher : Website

Arc faults are a fire-safety risk in both AC (alternating current) and DC wiring, but reliable detection of arc faults and determining the appropriate response is particularly difficult in DC plug-load circuits. This study will discuss the impact of impedance on arc interference characteristics in DC low voltage systems. Experiments were conducted involving accidents that increasingly occur using the arc chamber as a means of experimenting with independent variables including cable cross-sectional area and the number of fibers and control variables will consist of currents and voltages using devices using a Picoscope. In the analysis obtained values of the conductor resistance affect the characteristics of electric arcs. The smaller the value of the conductor resistance, the greater the value of the arc current produced. This is consistent with the values obtained from the study, when the smallest conductor resistance of 0.036 Ω obtained the highest value at the current value and electric arc power of 20.57 A and 19.43 W at the cross section of the conductor 1.5 mm2 with 24 fibers.

Evaluasi Perancangan Instalasi Listrik Tenaga di Perusahaan Air Minum Ilham Rais; Amien Rahardjo; Faiz Husnayain
Jetri : Jurnal Ilmiah Teknik Elektro Jetri, Volume 18, Nomor 1, Agustus 2020
Publisher : Website

In industrial companies, the electricity system is an important part of production where a good and standard electrical system increases production performance. So that the system is in accordance with the standards, then an electrical system evaluation is carried out. Evaluation is done by simulating power flow and short circuit using ETAP PowerStation 12.6.0 software. The results of the power flow analysis show that the voltage drop on the medium voltage network ranges from 0.04% - 0.05% and low voltage ranges from 0% - 3.36%, which means the system complies with the SPLN 72 1987 and PUIL 2011. Analysis of power flow shows a decrease in the percentage of loading of cables and transformers by 2.34% - 15.74% and in emergency conditions the generator supplies electricity with a percentage of loading of 44.92% when under normal load. Power flow analysis also shows an improvement in power factor from 0.778 lagging to 0.975 lagging. Following Presidential Regulation No. 8 2011, companies do not need to pay additional fees. Short circuit analysis shows there is a breaker equipment whose capacity is below the short circuit current so that it can suffer damage. Based on the analysis of power flow, the electrical design of PT. Aqua Golden Mississippi is in accordance with PLN standards. And based on a short circuit analysis, the problematic breaker equipment must be replaced to reduce damage.

Lockdown Impact due to Corona Pandemic on Electric Power Quality and Its Alternative Solutions for a University Office Building Ida Ayu Vadanti Locana Diwy; Amien Rahardjo; Aji Nur Widyanto; Faiz Husnayain; Rudy Setiabudy
ELKHA : Jurnal Teknik Elektro Vol. 14 No. 2 October 2022
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v14i2.56226

The pandemic has changed the usage pattern of electrical appliances in buildings. This new pattern can create new problems in terms of power quality and thus affect the electrical system’s reliability. The purpose of this study is to determine the power quality of the Dean Office Building, Faculty of Engineering, Universitas Indonesia, and propose alternative solutions to its problems. To determine the quality of electric power, the related parameters such as voltage, current, power factor, and harmonics are measured first. The measurement results are compared with existing standards. If these standards cannot be met, damage to electrical equipment can occur. Out of eight parameters, three did not meet the criteria. First, overvoltage on average voltage with the range of 231.5-232.8 V. Second, IHDi nominal on the 3rd, 5th, 7th, and 15th harmonics for Thursday, April 7, 2022 on 06:11 with the value of 70.3%, 55.34%, 27.1%, and 8.07%. And third, the minimum power factor for the T phase with the value of 0.7219 is still less than 0.85. Possible solutions include checking and changing the supply transformer tap-changer, making an energy monitoring system and wiring diagram for understanding the load profile of the building, and using a single-tuned filter for harmonic currents.

Interconnection Study of a 3 MWp Solar Farm on 20 kV Distribution System Considering Power Flow and Short Circuit Nadyanti Larasati; Amien Rahardjo; Hanindito Titah Prameswara; Faiz Husnayain
ELKHA : Jurnal Teknik Elektro Vol. 12 No. 2 October 2020
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v12i2.41598

Currently, renewable energy is under review so that its use can be more widespread in the future. One of the renewable energy sources that are commonly used is solar energy through solar cell technology that can convert solar energy into electrical energy and then becomes one of the components that makes up the solar power plant. The use of the solar power plant can be interconnected with distribution networks in electric power systems, both medium-voltage networks and low voltage networks. In this study, a 3 MWp capacity of solar power plant was conducted with the medium-voltage network system of X City. This interconnection study consisted of power flow and short circuit studies using ETAP 12.6.0 software. The results of the power flow study show the voltage level of each bus has increased by 0.293%-0.926% after interconnection with the solar power plant system, with a value that still matches the SPLN 1:1978 standard of 90% to 105%. Besides, the results of short circuit study show the value of the three-phase short circuit fault current experienced a change in value that is not too significant, with an increase of 1-37 A and a decrease of 1-5 A, with a value that is still according to the protection component rating standard of 25 kA.

Designing Air-Cored Axial Flux Permanent Magnet Generator with Double Rotor Aji Nur Widyanto; Rahmat Ariwidayat; Faiz Husnayaian; Amien Rahardjo; Agus R Utomo; I Made Ardita
ELKHA : Jurnal Teknik Elektro Vol. 14 No. 1 April 2022
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v14i1.53048

The development of renewable energy is carried out to reduce the use of fossil energy, which is decreasing in existence, increasing in price, and having a very long recovery cycle. One of the uses of technology to support renewable energy development is a synchronous machine that can be used to utilize wind and water energy. One type of synchronous machine that is widely used today is the radial flux machine. However, there is a saturation point in their development. Axial flux machines also called disc type machines, are an alternative to radial flux machines due to their compact shape and high-power density. Axial flux machines can be operated as small to medium-scale power plants. Besides that, they are ideal for low-speed applications. An axial flux permanent magnet (AFPM) generator is designed and built in this study. This generator design consists of a dual rotor with twelve permanent magnets and a single stator with nine coils. The primary material used for the stator and rotor is acrylic, while the permanent magnet uses neodymium N52. It is necessary to know the stator and rotor parameters such as distribution factor (kd), pitch factor (kp), and winding factor (kw) for designing the AFMP generator. The AFPM generator is designed to produce a phase voltage of 4.03 V at a nominal speed of 500 r/min. Based on the measurement results, it was found that the phase voltages at a rotating speed of 500 r/min for each phase are VR = 2.94 V, VS = 2.97 V, and VT = 2.95 V. There are differences in the test results and the design. It can be caused by design simplicity that does not consider magnetic saturation and internal reactance, which cannot be ignored but is not included in the calculation.

Design of Mazzilli’s Zero Voltage Switching (ZVS) Circuit as Plasma Glow Discharge Generator Anisah Muthi’ah; Amien Rahardjo; Faiz Husnayain; Chairul Hudaya
ELKHA : Jurnal Teknik Elektro Vol. 12 No. 2 October 2020
Publisher : Faculty of Engineering, Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/elkha.v12i2.41769

Purification water has several methods; one of them is the plasma generation. The circuit used to generate plasma is Zero Voltage Switching (ZVS), where its use uses the resonance circuit concept. The main category to generate plasma glow discharge is the circuit should generate high voltage output with a current range from 10-6 A to 1 A. In this study, when ZVS connected to the flyback converter with an input voltage of 12 V, the output values of 11 kV and 11 μA were obtained. In comparison, if ZVS was not connected to the flyback converter, the circuit is less stable, and the output value is weak because the output values only reach 8.97 kV and 8.97 μA. For maximum output, the ZVS circuit should be connected to the converter circuit due to the flyback converter can repair and strengthen the voltage. The flyback converter circuit is affected by the diode and capacitance effects. The effect of using capacitors in a flyback converter circuit is when the capacitance is too low, the ripple will form. Then when capacitance reaches a specific value, the ripple will decrease, and the voltage graph will approach a straight line. Hence the use of components in the ZVS and the flyback converter need to be considered because it affects how the release of plasma glow discharge will form.

Co-Authors Agus R Utomo Aji Nur Widyanto Anisah Muthi’ah Anjar Bryantiko Pangestu Chairul Hudaya Faiz Husnayaian Hanindito Titah Prameswara Husnayain, Faiz I Made Ardita Ida Ayu Vadanti Locana Diwy Ilham Rais Nadyanti Larasati Rahmat Ariwidayat Rudy Setiabudy

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