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All Journal Transmisi: Jurnal Ilmiah Teknik Elektro IPTEK Journal of Proceedings Series IPTEK The Journal for Technology and Science TELKOMNIKA (Telecommunication Computing Electronics and Control) ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Journal of Energy, Mechanical, Material and Manufacturing Engineering KACANEGARA Jurnal Pengabdian pada Masyarakat Indonesian Journal of Electrical Engineering and Computer Science Jurnal Difusi Industrial Research Workshop and National Seminar Jurnal INFOTEL
Hermagasantos Zein
Politeknik Negeri Bandung
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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Determining Basic Cost of Electricity on the Regionalization System Yusra Sabri; Hermagasantos Zein
Indonesian Journal of Electrical Engineering and Computer Science Vol 2, No 1: April 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v2.i1.pp40-48

Abstract

In electric business, costs that support production called with allowable electric cost or basic cost of electricity. Therefore, the basic cost of electricity has to get more attention seriously from the electric company in order to be trusted by consumers. In determining of the costs must be transparence and do the optimizing in calculating process because of revenues from customers have to be able to cover the basic cost of electricity so that the electric company does not go bankrupt. This paper will create concept and formulations for determining the basic cost of electricity in a region. There are a few different characteristics of each region will influence the costs. The basic cost of electricity can be different among regions that were caused by generating, investment and losses in the region. Later has been done a numerical simulation to simple power system and the results are matching with desired expectations.
Multi Dimension of Coarse to Fine Search Method Development for Solving Economic Dispatch Jangkung Raharjo; Adi Soeprijanto; Hermagasantos Zein
Indonesian Journal of Electrical Engineering and Computer Science Vol 3, No 1: July 2016
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v3.i1.pp1-9

Abstract

Economic dispatch problem has grown along with the development of electric power business, for example in a competitive electric power business that offers electrical energy in the form of the step function, non-differentiable function. This is not a continuous function so there is no guarantee that those methods can execute the optimization problem well, especially the Lagrange and Direct methods. There are the non-differentiable functions within the optimization will become a challenge that should be solved. This paper proposes Coarse to Fine Search method development to solve the problem. The Coarse to Fine Search is able to work for differentiable or non-differentiable functions, but is only limited maximum three dimensions. The development is done to multi dimension so that it can solve the economic dispatch problem. We named it Multi Dimension of Coarse to Fine Search. The simulation results of eight power plants show the developed method can work well, it is always convergent and fast with the execution time of 2.63 - 38.30 seconds for 25 - 200 population and 50 - 200 delta search.
Implementation of Electricity Business Competition Framework with Economic Dispatch Direct Method Hermagasantos Zein; Yusra Sabri; Ali Mashar
Indonesian Journal of Electrical Engineering and Computer Science Vol 10, No 4: August 2012
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Technically, electricity business under competition structure is more complex than that of vertically integrated one. The main prolems here are how to create an applicable competition framework and to solve electric calculations very quickly to obtain an optimal energi pricing, cost of losses, congestion and transportation costs by less than 15 minutes. This paper proposes a competition framework with the electric calculations, where  a bilateral contract has been accommodated. Optimal energy price in the paper is calculated based on direct method of economic dispatch to obtain the result very quickly. The proposed method has been simulated to a 4-bus system. The simulation results show that the method works well and complies with the expectation. Therefore, electric power business under competition structure can be well realized by the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v10i4.849
Determining LBMP through Optimal Power Flow in the Electric Power Business Hermagasantos Zein; Yusra Sabri; Erwin Dermawan
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 7: July 2014
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v12.i7.pp5086-5095

Abstract

The energy crisis has got the serious attention of experts since the middle19th century. Many efforts with significant progresses has been yielded to obtain its solution, such as technology development and diversification of primary energy sources, but the threat of the energy crisis has not been able to be avoided. Early tahun 1990, attention of experts are focused on energy savings, operating efficiencies and transparency. As a result, they have recommended changing the electric power business of the monopoly system to the market system, competition. In a competitive system, the problems will be more complex, especially in the energy price through optimization. One of the popular energy pricing methods today is LBMP, Locational Based Marginal Price, which has been successfully applied by New York, US. Generally, it is determined through ED, Economic Dispatch, calculations. In this case, Operator must do the complicated adjustments, especially for congestion conditions, so that thier results can be applied to the network. The simulation results, both heavy and light loads, showed that the OPF with step reduction can work well. Comparing with ED has to done some adjustments because a few contraints were out of their limits.
Economical sustainability of integrated photo voltaic and hydroponic systems for rural areas Conny K Wachjoe; Hermagasantos Zein; Annisa Syafitri Kurniasetiawati; Teguh Sasono; Yanti Suprianti; Fitria Yulistiani
JEMMME (Journal of Energy, Mechanical, Material, and Manufacturing Engineering) Vol. 7 No. 1 (2022)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22219/jemmme.v7i1.22938

Abstract

Hydroponic plantations are an effort of future agricultural technology, and this is due to population growth and increasingly saving agricultural land. Besides that, hydroponics can trigger rural economic development by opening employment opportunities for rural areas. The realization of hydroponics in rural areas that are not connected to the grid can use solar energy to circulate water continuously. The components of photo voltaic systems have been designed to the needs of the hydroponic system. Photo voltaic technology has been used for a long time for lighting in remote areas. Integrating the photo voltaic system with hydroponics is a synergistic effort to use energy productively. The case the demand for vegetables in rural areas is minimal, with limited land and the level of land productivity that depends on the availability of fertilizers. The economical method for analyzing the integrating system of photovoltaic and hydroponic systems is based on PBP, CCP, and ROROI. The results obtained for kale based on the PV-hydroponic integration system have a return on investment (PBP) of 13.5 months, cumulative cash posit (CCP) of 1.84, and Rate of Return on Investment (ROROI) of 8.01%. Adding the second and third hydroponic plant modules can reduce PBP to 6.2 months and 5.2 months, respectively. Likewise, CPP increased from 1.84 to 3.68 and 5.21, respectively. Meanwhile, ROROI rose from 8.01% to 11.43% and 13.34%, respectively.
A New Method of Artificial to Solve the Optimization Problems without the Violated Constraints Jangkung Raharjo; Hermagasantos Zein; Adi Soeprijanto; Kharisma Bani Adam
JURNAL INFOTEL Vol 13 No 2 (2021): May 2021
Publisher : LPPM INSTITUT TEKNOLOGI TELKOM PURWOKERTO

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20895/infotel.v13i2.624

Abstract

There are some problems in optimization that cannot be derived mathematically. Various methods have been developed to solve the optimization problem with various functional forms, whether differentiated or not, to overcome the problem, which are known as artificial methods such as artificial neural networks, particle swarm optimization, and genetic algorithms. In the literature, it is said that there is an artificial method that frequently falls to the minimum local solution. The local minimum results are proof that the artificial method is not accurate. This paper proposes the Large to Small Area Technique for power system optimization, which works based on reducing feasible areas. This method can work accurately, which that never violates all constraints in reaching the optimal point. However, to conclude that this method is superior to others, logical arguments and tests with mathematical simulations are needed. This proposed method has been tested with 24 target points using ten functions consisting of a quadratic function and a first-order function. The results showed that this method has an average accuracy of 99.97% and an average computation time of 62 seconds. The proposed technique can be an alternative in solving the economic dispatch problem in the power system.
Desain Ulang Sistem Pentanahan untuk Proteksi Tegangan Lebih pada Array Ground Mounted Area di PLTS 1MW Cirata Fauzan, Muhammad Rifky; Zein, Hermagasantos; Saodah, Siti
Prosiding Industrial Research Workshop and National Seminar Vol. 14 No. 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Semina
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5400

Abstract

Pembangkit listrik tenaga surya adalah pembangkit yang berada pada ruang terbuka dan jauh dari struktur tinggi yang bersifat konduktif sehingga berpotensi terkena sambaran petir baik secara langsung ataupun tidak langsung sehingga perlu dipasang lightning protection system untuk memproteksi gangguan petir dan menyalurkannya ke tanah melalui sistem pentanahan. Kualitas sistem pentanahan yang baik dapat ditunjukan dari resistansi pentanahan yang terukur. Semakin kecil nilai dari resistansi pentanahan, maka semakin baik pula kualitas dari sistem pentanahan tersebut. Namun pada PLTS 1MW Cirata terdapat beberapa sistem pentanahan untuk proteksi tegangan lebih (SPD) di Array Ground Mounted Area yang memiliki nilai resistansi besar dan tidak sesuai standar berdasarkan hasil pengukuran langsung. Oleh karena itu, penelitian ini memiliki tujuan untuk memperkecil resistansi sistem pentanahan tersebut dengan beberapa metode perbaikan yaitu mengubah ukuran panjang serta diameter elektroda, menambah jumlah elektroda yang digunakan, dan mengubah bentuk elektroda. Metode perbaikan sistem pentanahan yang paling efektif dalam mengurangi resistansi sistem pentanahan menjadi sesuai standar dan dapat diterapkan di lapangan yang memiliki keterbatasan kedalaman dan luas lahan yaitu mengubah bentuk elektroda batang tunggal menjadi elektroda pelat karena elektroda pelat tidak memerlukan lahan luas dan dapat dipasang secara dangkal.
Studi Proteksi Arus Lebih Fasa dan Netral pada Transformator 20 kV di PLTS 1MW Cirata Michael, Michael; Zein, Hermagasantos; Saodah, Siti
Prosiding Industrial Research Workshop and National Seminar Vol. 14 No. 1 (2023): Vol 14 (2023): Prosiding 14th Industrial Research Workshop and National Semina
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v14i1.5404

Abstract

Sistem proteksi pada transformator distribusi berperan penting dalam menjaga stabilitas dan kontinuitas memasok energi listrik dari PLTS 1 MW Cirata ke PLTA Cirata. Interkoneksi pada PLTS 1 MW Cirata dengan PLTA Cirata milik PT. PLN Nusantara Power bertujuan untuk mengurangi pemakaian sendiri pada operasi PLTA. Setelah PLTS beroperasi dari tahun 2015 belum terdapat studi kembali mengenai keandalan setting proteksi arus lebih pada transformator distribusi PLTS. Maka penelitian ini membahas mengenai evaluasi proteksi arus lebih terhadap transformator distribusi PLTS dengan mengacu pada standar BS 142, IEC 60255, dan IEEE C-37112. Terdapat tahapan-tahapan yang dilakukan pada penelitian ini diantaranya: pengumpulan data eksisting, pemodelan sistem pengaman transformator, simulasi hubung singkat, dan analisis hasil evaluasi. Berdasarkan studi yang dilakukan terdapat pengaturan arus pickup yang tidak sesuai dengan standar, yang dapat mengakibatkan false trip. Kemudian relay yang digunakan belum terdapat setting arus lebih waktu instan yang dapat mengakibatkan pemutusan yang telalu cepat pada saat terjadi gangguan arus lebih. Rekomendasi yang diberikan ialah resetting relay pada karakteristik waktu invers dan instan sesuai dengan standar yang ada.
Pengurangan Pencemaran Udara berdasarkan Konsep Pelabuhan Hijau WACHJOE, CONNY KURNIAWAN; ZEIN, HERMAGASANTOS; SUPRIYANTI, YANTI; GANTINA, TINA MULYA; KURNIASETIAWATI, ANNISA; MARENSHAPUTRI, PUREZA
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 2: Published May 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i2.252

Abstract

ABSTRAKPerdagangan bebas antara negara-negara di dunia telah mengubah pergerakan orang dan barang yang memberi dampak signifikan pada pemanfaatan transportasi laut. Fenomena ini akan berdampak pada peningkatan jumlah kapal yang berlabuh di pelabuhan. Ketika catu daya listrik tidak tersedia untuk kapal di pelabuhan, mesin diesel kapal dioperasikan untuk memenuhi kebutuhan beban listrik selama proses bongkar muat. Pengoperasian mesin diesel akan berdampak negatif pada area pelabuhan karena kebisingan dan polusi udara. Makalah ini akan menyediakan metode pasokan daya shore to ship (STS) yang memasok listrik dari darat ke kapal. STS dapat digunakan untuk meningkatkan kualitas udara di area pelabuhan. Hasilnya telah secara signifikan mengurangi jumlah polusi udara berbahaya, terutama untuk emisi NOx, VOC, dan PM masing-masing sebesar 97%, 94% dan 89%.Kata kunci: pelabuhan laut, pembangkit listrik tenaga diesel, shore to ship, berlabuh, emisi gas buang berbahaya ABSTRACTFree trade agreements between countries in the world have changed the movement of people and goods which creates a significant impact on sea transportation. This phenomenon will have an impact on the rapid increase in the number of vessels resting at the port. When the electrical power supply is not available for ships in the port, the ship diesel engine is operated to meet the electrical load during the loading and unloading process. Operation of the diesel engine will have a negative impact on the port area due to noise and air pollution. This paper will provide a shore-to-ship (STS) power supply method that supplies electricity from land to ships. STS can be used to improve air quality in the port area. The results have significantly reduced the amount of harmful air pollution, especially for NOx, VOC, and PM emissions by 97%, 94% and 89% respectively.Keywords: port, diesel plant, shore to ship, berthing, harmful air polution
A Method for Determining Customers’ Energy Shrinkage Cost WACHJOE, CONNY KURNIAWAN; ZEIN, HERMAGASANTOS; SAODAH, SITI
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 8, No 3: Published September 2020
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v8i3.672

Abstract

ABSTRAKPenyusutan energi adalah salah satu komponen biaya-biaya listrik yang harus dibayar oleh pelanggan-pelanggan pada tegangan sistem dari jaringan yang berbeda, jaringan tegangan tinggi, sedang dan rendah. Meskipun biaya bahan bakar campuran adalah sama untuk semua pelanggan, alokasi kerugian berbeda untuk setiap jaringan tersebut. Makalah ini mengusulkan suatu metode untuk menentukan alokasi biaya penyusutan energi untuk pelanggan-pelanggan dalam suatu model rangkaian ekivalen, dengan beban dikumpulkan pada setiap jaringan. Formulasi-formulasinya diturunkan untuk  mendapatkan alokasi kerugian yang adil di antara pelanggan-pelanggan berdasarkan hukum-hukum listrik. Hasil simulasi menunjukkan bahwa alokasi biaya penyusutan energi adalah 31%, 33% dan 36% untuk pelanggan tegangan tinggi, sedang dan rendah. Selain itu, efisiensi jaringan akan mempengaruhi total biaya penyusutan energi. Jika perhitungan kerugian daya menggunaka metode Aliran Daya Optimal, maka metoda ini dapat mengurangi kerugian sebesar ±3% atau setara dengan pengurangan biaya penyusutan energi sebesar 16%.Kata kunci: komponen biaya-biaya listrik, tegangan sistem, model rangkaian ekivalen, hukum-hukum listrik, alokasi biaya kerugian energi. ABSTRACTEnergy shrinkage is one component of electrical costs that must be paid by customers on the system voltage in different networks, high, medium, and low voltage networks. Although the fuel-mix costs are flat for all customers, loss allocation is different for each network. This paper proposes a method for determining the cost allocation of energy shrinkage to customers in an equivalent circuit model, with the loads collected for each network. Formulations are derived to get a fair allocation of losses among customers based on electric laws. The simulation results show that the cost allocation of energy shrinkage is 31%, 33%, and 36% for high, medium, and low voltage customers. Besides, network efficiency will affect the total cost of energy shrinkage. If power losses calculation uses the Optimal Power Flow method, it can reduce power losses by ±3% or equivalent to a reduction in the cost of energy shrinkage of 16%.Keywords: component of electrical costs, system voltage, eqivqlent sircuit model, electric laws, cost allocation of energy shrinkage
Co-Authors Aceng Daud Achmad Mudawari Adi Soeprijanto Ahmad Deni Ali Mashar Ali Mashar Ali Mashar Djafar Sodiq Eliana, Bella Erwin Dermawan Erwin Dermawan Erwin Yusuf Fauzan, Muhammad Rifky GANTINA, TINA MULYA I MADE WIWIT I Nyoman Sujana Ignatius Riyadi Mardiyanto Ignatius Riyadi Mardiyanto Ignatius Riyadi Mardiyanto Jangkung Raharjo Kharisma Bani Adam KURNIASETIAWATI, ANNISA MARENSHAPUTRI, PUREZA Michael Michael Mulyadi, Ahmad Deni siti saodah SITI SAODAH Teguh Sasono Wachjoe, Conny K. WACHJOE, CONNY KURNIAWAN YANTI SUPRIANTI, YANTI Yulistiani, Fitria Yusra Sabri Yusra Sabri Yusra Sabri Yusra Sabri