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Combined heat and power - optimal power flow based on thermodynamic model with associated petroleum and wet gas utilization constraints Priambudi Pujihatma; Sasongko Pramono Hadi; Sarjiya Sarjiya; Tri Agung Rohmat
International Journal of Electrical and Computer Engineering (IJECE) Vol 9, No 1: February 2019
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1682.941 KB) | DOI: 10.11591/ijece.v9i1.pp42-54

Abstract

Oil fields produce associated petroleum and wet gas, which can be mixed with commercial natural gas as fuel. Associated petroleum and wet gas are a low cost, low quality fuel, whereas commercial natural gas is the opposite. Two parameters are affected by this mixture: the fuel cost and the power – steam output of gas turbine – heat recovery steam generators. This research develops a Unit Commitment and Optimal Power Flow model based on Mixed Integer Nonlinear Programming to optimize combined heat and power cost by considering the optimal mixture between associated petroleum - wet gas and commercial natural gas. A thermodynamic model is used to represent the performance of gas turbine – heat recovery steam generators when subjected to different fuel mixtures. The results show that the proposed model can optimize cost by determining the most efficient power – steam dispatch and optimal fuel mixture. Furthermore, the optimization model can analyse the trade-off between power system losses, steam demand and associated - wet gas utilization. 
Optimasi Aliran Daya pada Sistem Kelistrikan Opsi Nuklir Berdasarkan Multi-Objective Function: Fuel Cost dan Flat Voltage Profile Rizki Firmansyah Setya Budi; Sarjiya Sarjiya; Sasongko Hadi Pramono
Jurnal Pengembangan Energi Nuklir Vol 18, No 2 (2016): Desember 2016
Publisher : Pusat Kajian Sistem Energi Nuklir, Badan Tenaga Nuklir Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17146/jpen.2016.18.2.3127

Abstract

Tujuan dari pengoperasian sistem tenaga listrik adalah untuk memasok daya dengan kualitas baik dan biaya pembangkitan seminimal mungkin. Kualitas yang baik membutuhkan biaya yang lebih besar, sehingga untuk mencapai tujuan tersebut diperlukan optimasi dengan fungsi obyektif yang bertujuan untuk memaksimalkan kualitas sekaligus meminimalkan biaya. Penelitian ini bertujuanuntuk mendapatkan kondisi aliran daya optimal atau optimal power flow (OPF) dari segi biaya pembangkitan maupun kualitas tenaga listrik di suatu sistem kelistrikan dengan opsi nuklir pada waktu beban puncak dengan menggabungkan fungsi obyektif fuel cost dan flat voltage profile. Fungsi obyektif fuel cost bertujuan untuk meminimalkan biaya pembangkitan sedangkan fungsi obyektif flat voltage profile bertujuan untuk memaksimalkan kualitas dengan meminimalkan perbedaan/variasi tegangan dalam sebuah sistem. Penelitian dilakukan melalui studi literatur, penentuan fungsi obyektif optimasi, penggabungan fungsi objektif, simulasi menggunakan contoh kasus dan analisis sensitivitas. Contoh kasus menggunakan sistem IEEE 9 Bus yang telah ditambahkan fungsi bahan bakar PLTN, PLTU, dan PLTG. Simulasi menggunakan program bantu ETAP 12.6.0. Analisis sensitivitas dilakukan dengan menggunakan nilai pembobotan dari 0-100% untuk tiap fungsi obyektif. Hasil simulasi menunjukkan bahwa OPF dicapai pada faktor pembebanan 60% untuk fuel cost dan 40% untuk flat voltage profile. Biaya pembangkitan padakondisi optimal tersebut sebesar 7266 US$/jam dengan selisih tegangan maksimum minimumnya sebesar 2,85%. Pada sistem ini PLTU membangkitkan daya sebesar 133,2 MW + 22,1 MVar dan PLTG sebesar 80,7 MW + 13,8 MVar. Sedangkan PLTN membangkitkan daya sebesar 89,9 MW + 12,9 Mvar dan akan ekonomis jika membangkitkan daya kurang dari 90 MW.
KECEPATAN PUTARAN DAN FREKUENSI GENERATOR PADA KONDISI BEBAN TIDAK SEIMBANG - Asmar; Sasongko Pramono Hadi; - T. Haryono
MEDIA ELEKTRIKA Vol 7, No 1 (2014): MEDIA ELEKTRIKA
Publisher : PSTE UNIMUS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (201.93 KB) | DOI: 10.26714/me.7.1.2014.%p

Abstract

Load imbalance caused instantaneous power generator contains components sinusiodal. There is a difference of energy between the stator and rotor always. The energy difference must be balanced by the rotor by means of decrease or increase speed. This gives rise to oscillations in the power angle, frequency and rotation speed of the generator. To determine the oscillation amplitude of the power angle, the instantaneous power generator should be expressed as a function of power angle. This is done by the method of symmetrical components. Angle at steady state power is the amount of power angle caused by the active power and the generator power angle caused by sinusiodal components. The frequency and speed of rotation angle based power generator is known. Oscillation frequency and rotation speed of the generator is affected by the power generated by the negative sequence components, generator inertia constant and damping factor. Keywords: Imbalance, symmetrical components, instantaneous power, power angle, frequency, speed of rotation.   
Electricity Demand and Supply Planning Analysis for Sumatera Interconnection System using Integrated Resources Planning Approach Suhono Suhono; Sarjiya Sarjiya; Sasongko Pramono Hadi
Jurnal Ilmiah Teknik Elektro Komputer dan Informatika Vol 5, No 1 (2019): June
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (419.183 KB) | DOI: 10.26555/jiteki.v5i1.13178

Abstract

The Sumatra interconnection system, which is the second-largest electricity system in Indonesia, is often experiencing rolling blackouts. That caused by a lack of supply from the power generating system of Sumatra. The Government has planned to develop new power plants through the fast track program (FTP). Until 2015, either power outages and supply shortages are still common. Therefore, an analysis of long-term electricity planning needed to support energy security in Sumatra. The Sumatra electricity system was modelled using integrated resource planning as a framework and the long-range energy alternative planning (LEAP) software as a tool to build and simulate the model. Three groups of scenarios will be compared are the fast track program (FTP) scenario, the biofuel mandatory (BM) scenario and optimization (OPT) scenario. The results show that the implementation of DSM programs through energy conservation scenario would be able to reduce the electricity demand in the future. On the other side, the alternative scenario shows that the electricity deficit could be resolved in 2022, while the optimization scenario shows that energy diversity would resolve the electricity crisis in the Sumatra interconnection system.
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
Optimalisasi Energi Terbarukan pada Pembangkit Tenaga Listrik dalam Menghadapi Desa Mandiri Energi di Margajaya Arif Febriansyah Juwito , Sasongko Pramonohadi , T. Haryono
Semesta Teknika Vol 15, No 1 (2012): MEI 2012
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v15i1.440

Abstract

The Energy Self-Sufficient Village is one of main programs from goverment about the village ability to produce energy. This program has been launched in 2007 by the President of the Republic of Indonesia, to enhance energy security in rural areas by harnessing local energy potential. The criteria of Energy Self-Sufficient Village is village capability to produce at least 60% of the total amount of required energy, using renewable energy. Geographically, Margajaya village has solar and microhydro resource which is very potential for being developed. Furthermore, Margajaya also produces agricultural commodities such as palm oil, in which it also produces waste like palm bunches which is a very potential biomass. The optimization of renewable energy for electrical power generation which has annual power peak of 65kW and daily energy consumtion of 415kWh/day in Margajaya village has been designed using HOMER. The result from simulation of Hybrid renewable system in HOMER showed that Hydro, Biomass and grid is the most economical solution over hydro-biomass-PV with battery, to design hybrid system with minimum total net present cost (NPC) and cost of electricity. The system can serve annual 100% of load in Margajaya and have surplus of electricity, and could sell to grid with amount of 124.827kWh/years. Economically, the electricity of the system costs US$ 0,013/kWh.
PENGENDALIAN KECEPATAN MOTOR BRUSHLESS DC (BLDC) MENGGUNAKAN METODE LOGIKA FUZZY Agung Dwi Yulianta; Sasongko Pramono Hadi; Suharyanto -
JURNAL TEKNOLOGI TECHNOSCIENTIA Technoscientia Vol 8 No 1 Agustus 2015
Publisher : Lembaga Penelitian & Pengabdian Kepada Masyarakat (LPPM), IST AKPRIND Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (310.982 KB) | DOI: 10.34151/technoscientia.v8i1.180

Abstract

BLDC motors were operated in many industrial environments, especially flammable industry. Besides, it possessed higher efficiency than induction motors, and smaller dimensions than a conventional direct current motors. Moreover, the absence of brush allowed its treatment became easy and showed almost no noise.Fuzzy logic was used as one of the motor speed controlling methods. The design of fuzzy controllers was done by simulating the output speed based on fuzzy controlling reference in order to obtain optimal control results. Several types of defuzzification used were COA / centroid, bisector, MOM, LOM, and SOM. Transient and calculation methods were used to analyze the ISE design optimization of control. The result showed that defuzzification method was able to follow the speed setting that was provided by COA method.The testing on changes of the speed setting from 1000 rpm to 2000 rpm showed the response characteristics of conventional PID control system with an average value of the rise time (tr) 0.29 second, steady time (ts) 0.9 second, overshoot 8.63%, and the percentage of ISE 98.19%. While results generated on fuzzy control system were average value of rise time (tr) 0.25 second, steady time (ts) 0.27 second, overshoot 0.15% and the percentage of ISE 99.36%. The fuzzy control system which was implemented to set the BLDC motor could improve the performance of conventional PID.
Studi Stabilitas Pemasangan PSS dengan Memanfaatkan Sinyal Global Berbasis PSO pada Sistem Tenaga Multimesin Fajar Prasetia; Sasongko Pramono Hadi; Sarjiya .
JURNAL NASIONAL TEKNIK ELEKTRO Vol 5 No 2: Juli 2016
Publisher : Jurusan Teknik Elektro Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (865.172 KB) | DOI: 10.25077/jnte.v5n2.285.2016

Abstract

This paper presents stability a study on multi-machine power system is equipped with PSS based on global signal as a control signal. Filters in PSS structure is designed based on frequency response, whereas the lead-lag parameters optimized by PSO. The performance of design proposed tested on 3-Machine 4-Bus power system that disturb with load increasing. The eigenvalue and participation factor analysis results show that system with PSS based on coordination between local and global signal have a performance such us damping ratio, settling time and overshoot are better than system with PSS based on local signal only.Keywords : Multi-machine, PSS, global signal, PSO, eigenvalue analysis, participation factor, stability.Abstrak—Paper ini menyajikan studi stabilitas pada sistem tenaga multimesin yang dilengkapi dengan PSS berbasis sinyal global sebagai sinyal kendali. Filter dalam struktur PSS dirancang berdasarkan tanggapan frekuensinya, sedangkan parameter lead-lag dioptimisasi dengan PSO. Unjuk kerja dari rancangan ini diuji pada test system 3-Mesin 4-Bus yang diganggu dengan kenaikan beban. Hasil analisis eigenvalue, participation factor dan simulasi domain waktu menunjukkan bahwa sistem dengan PSS berbasis koordinasi antara sinyal lokal dan sinyal global memiliki unjuk kerja berupa rasio redaman, settling time dan overshoot yang lebih baik dari PSS berbasis sinyal lokal saja.Kata Kunci : Multimesin, PSS, sinyal global, PSO, analisis eigenvalue, participation factor, stabilitas.
A New Approach to Optimize Over Current Relay Coordination Ismu Wijayanto; Sasongko Pramono Hadi
Prosiding 2nd Seminar Nasional IPTEK Terapan (SENIT) 2017 Vol 2, No 1 (2017): Mei 2017
Publisher : Politeknik Harapan Bersama Tegal

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Abstract

A power system can not be separated from interference. Interruptions in  power system may interfere service continuity  and potentially damage equipment due to fault current flow on the line. Therefore, it is needed a protection system that can isolate  disturbed area and can avoid equipment damage. Many relays installed in power protection systems,  and overcurrent relay is an important protective device and widely installed in the power system. This relay is useful to protect equipment from current spikes during interruption or flashover occurs. An electric power protection system can work optimally if there is coordination of installed overcurrent current relay. This research is expected to be useful for optimizing the overcurrent relay coordination protection.
PENERAPAN INFORMATION TECHNOLOGY BALANCED SCORECARD (IT BSC)PADA PERANCANGAN TATA KELOLA TEKNOLOGI INFORMASI MENGGUNAKAN KERANGKA KERJA COBIT 5 Misbah Misbah; Sasongko Pramono Hadi; Eko Nugroho
Prosiding Semnastek PROSIDING SEMNASTEK 2017
Publisher : Universitas Muhammadiyah Jakarta

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Abstract

Tata kelola teknologi informasi (TI) merupakan kebutuhan di setiap instansi penyelenggara pelayanan publik mengingat peran TI yang semakin penting sebagai upaya untuk meningkatkan kualitas pelayanan publik. Tata kelola TI dapat menyelaraskan kebutuhan, kondisi dan pilihan stakeholder untuk menentukan keseimbangan, tujuan organisasi yang akan dicapai, mengatur arah melalui prioritas dan membuat keputusan serta memonitor prestasi sesuai dengan arah dan tujuan organisasi. Penelitian ini dilakukan untuk menerapkanInformation Technology Balanced Scorecard (IT BSC) untuk pemetaan tujuan organisasi terkait TI dalam perancangan tata kelola TI menggunakan kerangka kerja COBIT 5. Penelitian ini menggunakan metode kualitatif yang menganalisa penerapan IT BSC pada kerangka kerja COBIT 5. Penelitian ini menjelaskan proses penerapan IT BSC untuk pemetaan tujuan organisasi terkait TI yang diselaraskan dengan tujuan bisnis organisasi dalam perancangan tata kelola TI menggunakan kerangka kerja COBIT 5. Penelitian ini diharapkan dapat memberi masukan untuk pengembangan proses pemetaan tujuan terkait TI dengan menerapkan IT BSCpada kerangka kerja COBIT 5.