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All Journal ELPOSYS: Jurnal Sistem Kelistrikan

Sri Wahyuni Dali

Politeknik Negeri Malang

Author-ID : 5515811

Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering

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Perencanaan Instalasi Penangkal Petir Pada Bangunan Industri Furniture Sukamdi; Sri Wahyuni Dali; Chandra Wiharya; Abdu Alimil Asror
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

In planning external protection systems, the methods that are widely used are conventional and electrostatic lightning rod methods, therefore to study further, the results of observations that have been made to the industry there is still no lightning rod system so the author will try to plan and compare the plans of the two types of rods. lightning rods are Conventional ( Franklin ) and Electrostatic ( EF Lightning Protection System ) lightning rods in terms of protection, technical, economical, advantages and disadvantages. The research and observation methods were carried out in the furniture industry area of PT. Marufuji Kenzai Indonesia, with data collection techniques through direct observation, interviews, and literature studies, so that the building plan data (height, width and length of the building) are obtained and the 2020 thunder day data (IKL 238) then the data obtained is used to calculate the parameters in planning the installation of lightning rods according to the standards of SNI 03-7015-2004 and PUIPP. So that the results obtained for planning the conventional method ( Franklin ) with the placement of air terminations using the rolling ball method obtained 22 finials installed with buildings that can withstand currents of up to 160.1 kA and for the electrostatic method ( EF Lightning Protection System ) with 1 finial the building can withstand currents up to 25,891 kA, and if it exceeds this value a lightning rod will be caught.

Analisis Pengaruh Penambahan Gardu Induk Terhadap Aliran Daya dan Profil Tegangan Sri Wahyuni Dali; Imron Ridzki; Rohmanita Duanaputri; Egar Rahmat Maulana
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

Addition of the Guluk-Guluk Substation, it will affect the flow of power and voltage in the electric power system. Based on the analysis of normal conditions before and after the Guluk-Guluk Substation in terms of the voltage value on each connected bus, it is still within the permitted limits, while the contingency ranking calculation using the Voltage Performance Index (PIv) method can determine contingency conditions N-1 to N -3 before and after the Guluk-Guluk Substation. In this case, it was found that during the contingency conditions N-1 to N-3 before the Guluk-Guluk Substation there was a decrease in the value of the voltage which was still within the permissible limits, but in the N-3 contingency there was also an overload on the line due to the release of two generator units and one channel. After the existence of the Guluk-Guluk Substation, during the N-1 to N-2 contingency conditions the voltage value was still within the permissible limits, but the voltage drop that occurred was bigger than the condition before the Guluk-Guluk Substation. For the N-3 contingency condition the voltage value does not meet the standard due to overload on the Ujung Substation - Bangkalan Substation line and the lack of power flow.

Desain Closed-Loop Boost Converter Berbasis Voltage Lift Cell Untuk Implementasi Penguat Tegangan Masramdhani Saputra; Asfari Hariz Santoso; Slamet Nurhadi; Imron Ridzki; Sri Wahyuni Dali
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

In this new era the use of Photovoltaic (PV) is increasingly being used as an energy source. However, this technology has a drawback, namely, the intensity of the sun's light is always changing every time. This can cause the output voltage of the Photovoltaic (PV) Cell to be variable or indeterminate. In the Photovoltaic (PV) Cell, a dc-dc converter circuit is needed which functions to regulate and change the output of the Photovoltaic (PV) Cell. Conventional DC-DC boost converters are unable to provide a high step-up voltage boost due to the effects of switching power, rectifier diodes, and equivalent series resistance of inductors and capacitors. In this study, a closed loop design using a PID controller and analysis of a non-isolated boost dc-dc converter based voltage lift technique were carried out to achieve a high step-up voltage gain. In the presented converter two inductors, three capacitors and three power diodes are used. From this structure, this converter is referred to as a voltage lift cell-based boost converter. The structure of the presented converter is considered very simple, since it has only two stages of power. The voltage and current equations of each element with the converter voltage gain under continuous conduction mode (CCM) were extracted. In addition, the steady state analysis of the amplified stress and boundary conditions is discussed in this study. This boost converter circuit is simulated through the PSIM application. From the simulation results in the PSIM application, it is found that the boost converter circuit is able to increase the voltage from 100 V to 400 V and has an error value of 0. The specifications of the simulation results are a duty cycle of 0.6, and a frequency of 10,000 Hz.

Analisis Pemecahan Beban Penyulang Kalipare 20 kV Sri Wahyuni Dali; Imron Ridzki; Muhammad Fahmi Hakim; Hana Nabilla Hapsari; Latasha Fadiela Nurlakshita
Elposys: Jurnal Sistem Kelistrikan Vol. 9 No. 2 (2022): ELPOSYS Vol. 9 No. 2 (2022)
Publisher : UPT - P2M POLINEMA

The Kalipare feeder is a feeder located at PT PLN (Persero) ULP Sumberpucung where the feeder has a feeder length of 232.9 kms and a load of 161.8 A, with a voltage drop of 17.981 kV, the energy loss that is not channeled in 40.82 minutes is IDR 5,333,734.00. So with that the feeder is carried out there is a splitting of the load into two, namely 86.6 A and 74.4 A, with the end voltage being 19.27 kV, with the energy loss that is not channeled in 40.82 minutes is Rp. 2,454.510.8. This load solving is carried out based on the existing conditions of the Kalipare Feeder in 2019, as well as modeling in the form of simulations using ETAP 12.6 and analyzing the simulation results with the existing load breaking conditions in 2020. Load splitting locations are carried out at 7 points taking into account the value of the investment to be made used to do the job. The locations where the load splitting will be carried out are GI Karangkates, Perempatan Peteng, Tumpakmiri, Kalipare, and Banduarjo with an investment cost of Rp. 21,124,247,696 with the construction of 527 gates. After breaking the load, which resulted in the Kalipare feeder and the Donomulyo feeder, the value of the voltage drop on the Kalipare feeder decreased to 18.25 kV; 8.70%, while the Donomulyo Feeder is 19.241 kV; 3.84%. The solution to the load of the Kalipare feeder will minimize losses due to blackouts and increase customer satisfaction.

Rancang Bangun Turbin Crossflow Pada Spiral Vortex Turbine House Sebagai Pembangkit Listrik Tenaga Pikohidro Sigit Setya Wiwaha; Ferdian Ronilaya; Farhan Dhiya Ulhaq; M. Naufal Fariz Muhfid; Ricky Setyawan; Sri Wahyuni Dali
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.v8i3.74

The Javan Langur Center is a Javan langur rehabilitation center located in the middle of the Coban Talun forest. In the area there is a river that can be used as a Pico Hydro Power Plant with a crossflow turbine as its main component. The selection of a crossflow turbine aims to analyze the latest design of a crossflow turbine, to determine the effect of the number of blades on the turbine rotation speed in the PLTPH system and to regulate discharge to obtain maximum output. The research began with making 2D designs and then continued in 3D and applied in real form. Data collection is carried out by creating a workflow for the entire process with an analysis method using a comparison of test data and field measurements. After data collection and analysis, the turbine at 100% intake opening produced a turbine speed of 52 rpm without pulleys and produced an output of 18 volts with a current of 0.31 A when connected to a battery.

Evaluasi Pentanahan Terhadap Sambaran Petir Pada SUTT 70 kV Menggunakan Electro Magnetic Transient Program (EMTP) Sigit Setya Wiwaha; Rohmanita Duanaputri; Sigi Syah Wibowo; Adil Prasetyo; Sri Wahyuni Dali
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.v8i3.75

The transmission system is a system that often experiences lightning strikes and can cause back flashover (BFO) if there is a direct strike on the ground wire or on the tower. Lightning strikes can also cause touch voltage and step voltage hazards when lightning strikes the ground surface. Grounding is a safety device that functions to protect equipment, systems, humans and other living beings from electrical surges, especially lightning strikes. The grounding resistance value on the tower must be made as small as possible so as not to cause high tower voltage which can ultimately disrupt the transmission system. The grounding resistance limit according to PUIL 2000 is no more than or equal to 5 Ohms. This study aims to evaluate how feasible the tower and its protective devices are on the tower, including grounding and arresters in the event of a lightning strike. By collecting data, calculating tower voltage and simulating lightning overvoltage with the ATPdraw application. From testing the tower voltage by taking a sample on a tower with the highest grounding resistance of 5.8 Ohms on tower T63, the tower voltage value was obtained at 169.94 when given a current of 20 kA, 345.6 kV when given a current of 40 kA, and 682.03 kV when given a current of 80 kA. By calculation and simulation that the tower voltage value does not cause Back flashover (BFO) so it can be categorized as safe and feasible from lightning strike interference.

Co-Authors Abdu Alimil Asror Adil Prasetyo Asfari Hariz Santoso Chandra Wiharya Egar Rahmat Maulana Fahmi Hakim, Muhammad Farhan Dhiya Ulhaq Hana Nabilla Hapsari Latasha Fadiela Nurlakshita M. Naufal Fariz Muhfid Masramdhani Saputra Nurhadi - Rhezal Agung Ananto Ricky Setyawan Ridzki, Imron Rohmanita Duanaputri Ronilaya, Ferdian Sigi Syah Wibowo Sigit Setya Wiwaha Sukamdi

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