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All Journal PROSIDING CSGTEIS 2013 JTERA (Jurnal Teknologi Rekayasa) IJITEE (International Journal of Information Technology and Electrical Engineering) Jurnal Listrik, Instrumentasi, dan Elektronika Terapan Jurnal Nasional Teknik Elektro dan Teknologi Informasi Journal FORTEI-JEERI
Lesnanto Multa Putranto
Universitas Gadjah Mada
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Pengaruh Penempatan Unified Power Flow Controller Terhadap Kestabilan Tegangan Sistem Tenaga Listrik Lesnanto Multa Putranto; Sasongko Pramono Hadi; Restu Prima Aridani
PROSIDING CSGTEIS 2013 CSGTEIS 2013
Publisher : PROSIDING CSGTEIS 2013

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Abstract

Abstract — Permintaan kebutuhan listrik kian meningkat pesat, konsekuensi dari hal ini adalah adanya ancaman terhadap kestabilan sistem yang salah satunya adalah kestabilan tegangan. Flexible Alternating Current Transmission System (FACTS) adalah peralatan elektronik solid state yang mampu mengatur transmisi daya listrik secara fleksibel yang dapat digunakan untuk mengatasi permasalahan tersebut. Pada penelitian ini akan di uji pengaruh penempatan Unified Power Flow Controller (UPFC), sebagai salah satu dari jenis FACTS, terhadap kestabilan tegangan sistem tenaga listrik dengan menggunakan rangkaian sistem standar IEEE 14. Kestabilan tegangan diamati dengan menggunakan bantuan kurva PV yang dapat menunjukkan nilai karakteristik tegangan terhadap pembebanan daya aktif untuk setiap bus, dengan. Nilai tegangan sistem pada saat mencapai titik Maximum Loading Point (MLP) digunakan untuk memilih bus atau saluran terkritis sebagai lokasi penempatan UPFC. Efek pemasangan UPFC terhadap besarnya nilai pembangkitan dan losses juga diamati pada berbagai nilai pembebanan yang bervariasi. Hasil yang diperoleh pada penelitian ini menunjukan bahwa penempatan UPFC pada saluran terkritis dapat meningkatkan kestabilan tegangan dengan indikasi nilai MLP yang semakin besar, dan menyebabkan losses berkurang, besar pembangkitan semakin kecil sehingga membuat sistem semakin efisien.Keywords— kestabilitan tegangan, FACTS, UPFC, MLP
Studi Kestabilan Tegangan Jaringan IEEE 9 Bus Menggunakan Indeks Kestabilan Tegangan Avrin Nur Widiastuti; Lesnanto Multa Putranto; Randhy Ramono Syamri
PROSIDING CSGTEIS 2013 CSGTEIS 2013
Publisher : PROSIDING CSGTEIS 2013

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Abstract

Intisari — Sistem tenaga yang sangat terbebani sering terkendala oleh ketidakstabilan tegangan.Ketidakstabilan tegangan dapat menimbulkan banyak masalah, seperti jatuhnya tegangan pada sebagian besar sistem, keruntuhan tegangan (voltage collapse), bahkan potensi terjadinya blackout pada sistem.Pada penelitian ini simulasi berbasis waktu digunakan untuk mempelajari kestabilan tegangan sistem IEEE 9 bus. Penelitian ini menggunakan Indeks Kestabilan Tegangan (Voltage Stability Indeks, VSI) yang bertujuan untuk mengetahui tingkat kestabilan tegangan, memprediksi kapan terjadinya ketidakstabilan tegangan, dan mengetahui bagian sistem yang paling berpartisipasi atau rawanterhadap ketidakstabilan tegangan. Pada penelitian ini akan digunakan dua jenis indeks yaitu analisis modal dan PQVSI. Analisis modal menilai kestabilan tegangan dari eigenvalue matriks Jacobian tereduksi. Informasi dari eigenvektor matriks Jacobian tereduksi digunakan untuk mencari bus yang paling berpartisipasi terhadap kondisi ketidakstabilan tegangan yang dikenal dengan metodeFaktor Partisipasi Bus (FPB). Sedangkan PQVSI menilai kestabilan tegangan dengan membandingkan aliran daya suatu saluran pada waktu tertentu dengan batas aliran daya maksimalnya.Simulasi dilakukan dengan menggunakan 2 skenario. Skenario 1 dengan pemberian kenaikan beban sebesar 0,3 pu/detik pada bus 5. Hasil yang didapatkan system mulai menuju ketidakstabilan pada detik ke 12,83 yang ditandai dengan nilai eigenvalue mendekati nol (0,0121). Dengan FPB diketahui bahwa partisipasi terbesar adalah pada bus 5 dengan nilai 0,693.Dari analisis PQVSI didapatkan bahwa saluran dari bus 4 ke bus 5 merupakan saluran yang paling rawan menuju ketidakstabilan. Skenario 2 dengan pemberian kenaikan beban sebesar 2 pu pada bus 7. Hasil yang didapatkan system mulai menuju ketidakstabilan pada detik ke 23,92 yang ditandai dengan nilai eigenvalue mendekati nol (0,0013). Dengan FPB diketahui bahwa partisipasi terbesar adalah pada bus 7 dengan nilai 0,598.Dari analisis PQVSI diketahui bahwa saluran dari bus 7 ke bus 8 merupakan saluran yang paling rawan menuju ketidakstabilan.Kata kunci— Kestabilan tegangan, ketidakstabilan tegangan, indeks kestabilan tegangan, analisis modal, faktor partisipasi bus, PQVSI.
A Determination of PV and Wind Power Plant Penetration into a Power System: a Case of Java Bali Musthafa Abdur Rosyied; Sarjiya Sarjiya; Lesnanto Multa Putranto; Izzuddin Fathin Azhar; Eko Yudo Pramono
Journal FORTEI-JEERI Vol. 1 No. 1 (2020): FORTEI-JEERI
Publisher : Forum Pendidikan Tinggi Teknik Elektro Indonesia (FORTEI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (543.539 KB) | DOI: 10.46962/forteijeeri.v1i1.5

Abstract

PT. PLN (Persero) has planned to develop a new renewable energy which has a minimum energy mix of 23% in 2025 and 31% in 2030. An intermittent renewable energy plant, which is uncontrollable and unpredictable, will begin to be massively used. Associated to the intermittent nature of the of intermittent renewable energy source (IRES), adequate system flexibility is necessary. This study determined the penetration level IRES generating unit using the systems load and existing generating unit ramping rate characteristic, IRES generating unit’s ramping rate and system’s technical minimum load (TML) on the Java Bali System based on the 2017 operation condition. The results showed that the TML value of the operating plant was 12164,69 MW. The ramping up and down capabilities of conventional power plants are 945.04 MW / 30 min and 4006.08 MW / 30 min where ± 5% of penetration of IRES was still applicable for the Java Bali System.
Piezoelectric Energy Harvester for IoT Sensor Devices Noor Pratama Apriyanto; Eka Firmansyah; Lesnanto Multa Putranto
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 5, No 4 (2021): December 2021
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijitee.67120

Abstract

Limited battery power is a major challenge for wireless sensor network (WSN) in internet of things (IoT) applications, especially in hard-to-reach places that require periodic battery replacement. The energy harvesting application is intended as an alternative to maintain network lifetime by utilizing environmental energy. The proposed method utilized piezoelectricity to convert vibration or pressure energy into electrical energy through a modular piezoelectric energy harvesting design used to supply energy to sensor nodes in WSN. The module design consisted of several piezoelectric elements, of which each had a different character in generating energy. A bridge diode was connected to each element to reduce the feedback effect of other elements when pressure was exerted. The energy produced by the piezoelectric is an impulse so that the capacitor was used to quickly store the energy. The proposed module produced 7.436 μJ for each step and 297.4 μJ of total energy with pressure of a 45 kg load 40 times with specific experiments installed under each step. The energy could supply WSN nodes in IoT application with a simple energy harvesting system. This paper presents a procedure for measuring the energy harvested from a commonly available piezoelectric buzzer. The specific configurations of the piezoelectric and the experiment setups will be explained. Therefore, the output energy characteristics will be understood. In the end, the potentially harvested energy can be estimated. Therefore, the configuration of IoT WSN could be planned.
Optimal Capacity and Location Wind Turbine to Minimize Power Losses Using NSGA-II Dieta Wahyu Asry Ningtias; F. Danang Wijaya; Lesnanto Putra Multanto
IJITEE (International Journal of Information Technology and Electrical Engineering) Vol 5, No 4 (2021): December 2021
Publisher : Department of Electrical Engineering and Information Technology,Faculty of Engineering UGM

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijitee.70161

Abstract

Voltage deviations and power losses in the distribution network can be handled in various ways, such as adding diesel power plants and wind turbines. Adaut Village, Tanimbar Islands Regency, Maluku Province has installed a diesel power plant with a capacity of 1,200 kW, while the average hourly electricity load is 374.9 kW. Adaut Village has high wind potential that can be used for distributed generations namely wind turbine (WT). WT can be used to improve power quality in terms of power losses and voltage deviations. In adding WT, the capacity and location must be determined to get good power quality in terms of power loss and voltage deviation. The research applied an optimization technique for determining the capacity and location of WT using non-dominated sorting genetic algorithm II (NSGAII) with an objective function of power losses and voltage deviation. In addition, the economic aspects of the power plant were calculated using the levelized cost of energy (LCOE). The research used scenarios based on the number of WT installed. The best results were obtained in scenario IV or 4 WT with 1.38 kW on Bus 2, 422.43 kW on Bus 15, 834.33 kW on Bus 30, and 380.81 kW on Bus 31 which could reduce power losses by 80% with an LCOE value of Rp7,113.15/kWh. The addition of the WT could also increase the voltage profile to close to 1 pu, which means it can minimize the voltage deviation in the distribution network.
Perencanaan Pengembangan Pembangkit Sistem Muna-Buton dengan Mempertimbangkan Sistem Interkoneksi Ahmad Fatana; Sarjiya; Lesnanto Multa Putranto
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 11 No 3: Agustus 2022
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v11i3.3508

Abstract

Electrical energy consumption has increased annually. It is in line with the fulfillment of electricity sales for the last five years (2013-2017) with a 5.1% growth per year. Muna and Buton are large islands in Southeast Sulawesi with a population of 360,682 and an area of 7,712.18 km2. Muna and Buton are two main cities in Southeast Sulawesi that are developing rapidly. Those two regions are relatively rich in natural potential, promoting local economic growth. The primary source of electricity for both regions is Buton. Current electricity consumption in Muna and Buton is relatively high, with a peak load of 37 MW primarily fulfilled by diesel power plants (pembangkit listrik tenaga diesel, PLTD) of 30.15 MW. The government's target to achieve a new renewable energy mix (NRE) of 23% in 2025 and 31% in 2050 is contrary to the situation of generations in Muna and Buton, which is currently still dominated by PLTD. The planning was conducted by looking at its effect on the cost of generation construction, reserve margin, energy mix, and total cost. The desired optimization value was achieved through several performed scenarios, i.e., an isolated or pre-interconnection scenario, assuming each system was separated, and an interconnection system, assuming that interconnection was performed in Muna and Buton system. The optimization method was carried out using mixed-integer linear programming (MILP) by employing the OSeMOSYS software platform. The optimization results show that the Muna-Buton generation expansion planning has been successfully carried out. Of the several performed scenarios, the scenario with the interconnection system can be selected as the best option. It is based on the total cost value and reduced generation costs of 1,073 IDR per kWh in 2022 and 1,362 IDR per kWh in 2047, with an average of 1,202 IDR per kWh.
Analisa Teknis Penerapan Pembangkit Listrik Tenaga Surya Atap Untuk Kawasan Industri Ridwan Nurdin; Ahmad Agus Setiawan; Lesnanto Multa Putranto
JTERA (Jurnal Teknologi Rekayasa) Vol 7, No 2: December 2022
Publisher : Politeknik Sukabumi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31544/jtera.v7.i2.2022.331-340

Abstract

Pemanfaatan energi surya khususnya PLTS atap untuk kawasan industri masih terbilang sedikit, di mana pada umumnya kawasan tersebut mengkonsumsi daya listrik yang tinggi dan memiliki luasan atap bangunan yang besar. Oleh karena itu, penelitian ini dilakukan untuk mendapatkan rancangan sistem PLTS atap yang tepat dan dapat dikembangkan di kawasan industri PT. Dirgantara Indonesia, serta untuk mengetahui estimasi nilai produksi energi dari penerapan PLTS atap di kawasan industri. Metode penelitian yang dilakukan adalah dengan pengumpulan data primer dan sekunder yang digunakan untuk menghitung potensi daya keluaran dari sistem PLTS atap berdasarkan luasan atap hanggar kawasan dan berdasarkan skenario yang dibuat. Pemilihan teknologi PLTS atap yang digunakan adalah PLTS on-grid tanpa baterai dimana listrik hasil produksi PLTS akan digunakan oleh kawasan dan terdapat kelebihan produksi energi akan diekspor ke jaringan PLN. Penelitian ini mengusulkan dua skenario dimana skenario 1 menggunakan daya listrik terpasang kawasan sebagai acuan daya PLTS atap yang akan dipasang dan untuk skenario 2 menggunakan jumlah konsumsi energi listrik tahunan kawasan sebagai acuan seberapa besar daya PLTS atap yang harus dipasang untuk memenuhi 100% kebutuhan energi listrik di kawasan. Hasil analisis menunjukan bahwa dengan penerapan skenario 1, PLTS atap dapat memenuhi kebutuhan energi listrik kawasan sebesar 42,8% dan pada skenario 2 untuk memenuhi 100% kebutuhan energi listrik diperlukan PLTS atap dengan daya sebesar 14,7 MWp.
Stochastic Unit Commitment dalam Berbagai Ukuran Sistem di bawah Ketidakpastian Peramalan PLTS yang Tinggi Muhammad Yasirroni; Lesnanto Multa Putranto; Sarjiya; Husni Rois Ali; Indra Triwibowo; Qiangqiang Xie
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 12 No 1: Februari 2023
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v12i1.5281

Abstract

This paper proposes a stochastic unit commitment (SUC) approach to solve a day-ahead unit commitment (UC) problem in a system with high uncertainty net load which is caused by photovoltaic (PV) power plants. In contrast with robust unit commitment (RUC) which only considers the worst-case scenario, SUC considers every possible scenario with its probability. Multiple possible PV curves were obtained using k-means clustering on historical data. The proportion of cluster members was used as a weight factor representing the occurrence probability of PV curves. The test was separated into two-step tests, namely day-ahead and real-time markets, using IEEE 10 generating unit system and solved using CPLEX. The results showed that in a day-ahead UC, SUC ($539,896) had lower cost than RUC ($548,005). However, when the total energy generated was considered, the SUC (20.78 $/MWh) cost higher compared to RUC (20.75 $/MWh). It is because the solution proposed by SUC is as robust as the RUC, but the generation cost formulation also considers over-commitment. Thus, SUC produced a fairer price for the independent power producer and electric utility in the day-ahead calculation. The results also showed that in the test environment of the real-time market, SUC was able to produce a robust solution without going into over-commitment. It is clearly shown in a 30 units system test with 10 centroids, in which SUC had a cheaper solution (20.7253 $/MWh) compared to RUC (20.7285 $/MWh), without violating power balance or going to load shedding.
Pemanfaatan SFCL tipe Bridge untuk Meningkatkan Stabilitas Transien Microgrid dan Economic Feasibility Roy Bayu Negara; Fransisco Danang Wijaya; Lesnanto Multa Putranto; Mohd. Brado Frasetyo
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 12 No 2: Mei 2023
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v12i2.4679

Abstract

Currently, renewable energy (RE) generators are widely used by society to reduce emissions. Therefore, a RE-sourced microgrid system coexisting with conventional energy is being developed. However, these electrical energy systems experience transient disturbances such as short circuits, load increase, and decrease in generator output. These disturbances can result in voltage drops and frequency instability. Therefore, efforts are needed to maintain system stability by using a superconducting fault current limiter (SFCL). The SCFL selection is based on its capability to limit the fault current and its speed in providing protection during transient disturbances. The utilized SFCL model is the bridge-type SFCL with two inductors as its main components. Under normal conditions, the current flows through two inductors, and when a fault occurs, the current will go through one inductor. This research was conducted in a scenario where a fault occurred. The voltage value without a bridge-type SFCL during the fault condition was 2.5 V. When a bridge-type SFCL was used, the voltage value was 207 V. Without a bridge-type SFCL, the measured current was 30 kA, whereas the measured current was 1.1 kA with one. The frequency range was 49.7 Hz - 50.2 Hz without bridge-type SFCL and 49.9 Hz - 50.1 Hz with bridge-type SFCL. This research also added an economic feasibility calculation to determine the microgrid system feasibility when using bridge-type SFCL. The calculation consisted of four parts, i.e., net present value (NPV), profitability index (PI), discounted payback period (DPP), and internal rate of return (IRR). Economic feasibility was obtained for an NPV value of US$6,865,405, a PI value of 2.4, a DPP value of four years, and an IRR value of 28.59%. When the obtained value is compared to the feasibility standard, it is determined that a microgrid with SFCL is feasible.
Pengembangan Sistem Kelistrikan Tanah Merah Mempertimbangkan Energi Baru Terbarukan dan Emisi CO2 Amrisal Kamal Fajri; Sarjiya; Lesnanto Multa Putranto; Adlan Bagus Pradana; Fransisco Danang Wijaya
Jurnal Nasional Teknik Elektro dan Teknologi Informasi Vol 12 No 3: Agustus 2023
Publisher : Departemen Teknik Elektro dan Teknologi Informasi, Fakultas Teknik, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jnteti.v12i3.5254

Abstract

The condition of the electricity system in the Papua region still has an electrification ratio of 94% with a high electricity generation cost of IDR3,041/kWh. In addition, the existing electricity system still consists of over 100 small systems, the majority of which are diesel power plants. One of the systems is the Tanah Merah area, with a population of 19,136 people and an energy demand of 6.89 GWh. The region is projected to experience expansion and population growth, resulting in a corresponding rise in the demand for electrical energy. Therefore, planning for the development of power plant systems needs to be done to meet the growing demand for electrical energy. Planning in remote areas is typically done for a short-term timeframe spanning from 2025 to 2030, involving the optimization process of several proposed power plant candidates. The proposed candidate power plants consider gas and fuel supply, as well as the availability of local primary energy and technology. Optimization will minimize the total cost of the to-be-selected power plant, which has features including initial investment costs, ongoing operation and maintenance costs, fuel expenses, and the residual value of the assets throughout the planned duration. In planning, a greenhouse gas emission reduction of 29% and an energy mix proportion of 23% need to be considered in accordance with government policy. Therefore, two scenarios covering both economic and environmental aspects were considered in the simulation process, namely the business as usual (BaU) scenario and the nationally determined contributions (NDC) scenario for emission limitation. Optimization was developed based on mixed-integer linear programming (MILP) performed in HOMER software. The simulation results indicate that the electricity generation cost for the BaU scenario is more economical compared to the NDC scenario at IDR2,559.8/kWh versus IDR3,104.64/kWh.
Co-Authors Adlan Bagus Pradana Ahmad Agus Setiawan Amrisal Kamal Fajri Avrin Nur Widiastuti Eka Firmansyah Eko Yudo Pramono Fatana, Ahmad Fransisco Danang Wijaya Husni Rois Ali Indra Triwibowo Izzuddin Fathin Azhar Kurniawan, Jaya Mohd. Brado Frasetyo Muhammad Yasirroni Musthafa Abdur Rosyied Ningtias, Dieta Wahyu Asry Noor Pratama Apriyanto Prabowo, Muhaimin Muchti Prasetyo, Pandhu Ardi Qiangqiang Xie Randhy Ramono Syamri Restu Prima Aridani Ridwan Nurdin Roy Bayu Negara Sarjiya Sasongko Pramono Hadi