Adi Soeprijanto
Institut Teknologi Sepuluh Nopember Surabaya

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Economic Dispatch untuk Grid Mikro Hibrida dengan Distributed Energy Storage Berbasis Metode Quadratic Programming Kemas Robby Firmansyah; Rony Seto Wibowo; Adi Soeprijanto
Jurnal Teknik ITS Vol 5, No 2 (2016)
Publisher : Direktorat Riset dan Pengabdian Masyarakat (DRPM), ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (781.642 KB) | DOI: 10.12962/j23373539.v5i2.16278


Kebutuhan daya listrik saat ini meningkat pesat dengan perkembangan teknologi. Peningkatan kebutuhan daya listrik bertolak belakang dengan ketersediaan sumber energi tak terbarukan. Permasalahan ini akan berdampak pada ketahanan listrik nasional, untuk memenuhi kebutuhan daya listrik yang besar dengan wilayah yang luas diperlukan pembangkit –pembangkit tersebar dengan skala kecil. Pembangkit tersebar diupayakan bersumber pada energi terbarukan untuk meminimalkan pemakaian sumber energi tak terbarukan. Selain itu diperlukan adanya Energy Storage, Energy Storage diperlukan untuk menyimpan kelebihan energi yang dihasilkan oleh pembangkit lainnya. Dengan adanya pembangkit tersebar dan Energy Storage yang dihubungkan dengan grid utama Perusahaan Listrik Negara melaui Grid Mikro, maka penting untuk menentukan optimisasi besarnya pembangkit daya listrik untuk masing-masing pembangkit yang sesuai dengan kebutuhan daya listrik. Optimisasi ini dikenal dengan istilah Economic Dispatch.  Metode yang diterapkan untuk optimisasi Economic Dispatch adalah dengan menggunakan Quadratic Programming. Simulasi dilakukan pada sistem IEEE 14 bus menggunakan software MATLAB. Hasil simulasi dan analisis menunjukkan bahwa program dapat memenuhi batasan yang ditentukan dan biaya pembangkitan tenaga listrik untuk pengoperasian Grid Mikro Hibrida adalah  25,53 $
Applying of Double Seasonal ARIMA Model for Electrical Power Demand Forecasting at PT. PLN Gresik Indonesia Ismit Mado; Adi Soeprijanto; Suhartono Suhartono
International Journal of Electrical and Computer Engineering (IJECE) Vol 8, No 6: December 2018
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (880.972 KB) | DOI: 10.11591/ijece.v8i6.pp4892-4901


The prediction of the use of electric power is very important to maintain a balance between the supply and demand of electric power in the power generation system. Due to a fluctuating of electrical power demand in the electricity load center, an accurate forecasting method is required to maintain the efficiency and reliability of power generation system continuously. Such conditions greatly affect the dynamic stability of power generation systems. The objective of this research is to propose Double Seasonal Autoregressive Integrated Moving Average (DSARIMA) to predict electricity load. Half hourly load data for of three years period at PT. PLN Gresik Indonesia power plant unit are used as case study. The parameters of DSARIMA model are estimated by using least squares method. The result shows that the best model to predict these data is subset DSARIMA with order ([1,2,7,16,18,35,46],1,[1,3,13,21,27,46])(1,1,1)48(0,0,1)336 with MAPE about 2.06%. Thus, future research could be done by using these predictive results as models of optimal control parameters on the power system side.
Gabor-based Face Recognition with Illumination Variation using Subspace-Linear Discriminant Analysis Hendra Kusuma; Wirawan Wirawan; Adi Soeprijanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 10, No 1: March 2012
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v10i1.767


            Face recognition has been an active research topic in the past few decades due to its potential applications. Accurate face recognition is still a difficult task, especially in the case that illumination is unconstrained. This paper presents an efficient method for the recognition of faces with different illumination by using Gabor features, which are extracted by using log-Gabor filters of six orientations and four scales. By Using sliding window algorithm, these features are extracted at image block-regions. Extracted features are passed to the principal component analysis (PCA) and then to linear discriminant analysis (LDA). For development and testing we used facial images from the Yale-B databases. The proposed method achieved 86–100 % rank 1 recognition rate.
Transient Power Quality Performance of Multi Photovoltaics using MPPT P and O/MPPT Fuzzy Amirullah Amirullah; Agus Kiswantono; Ontoseno Penangsang; Adi Soeprijanto
TELKOMNIKA (Telecommunication Computing Electronics and Control) Vol 16, No 6: December 2018
Publisher : Universitas Ahmad Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12928/telkomnika.v16i6.9897


This paper presents comparative performance of transient power quality due to multi photovoltaic (PV) integration to grid at both fixed temperature and solar irradiation connected using Maximum Power Point Tracking Perturb and Observe (MPPT P and O)/MPPT Fuzzy. This research is performed as five transient of short-circuit faults on point common coupling (PCC) bus. An artificial intelligence with fuzzy logic controller (FLC) is used to set duty cycle with step variable to control DC/DC boost converter, generate quick convergence to determine MPPT for controlling of PV output voltage. Furthermore the result is compared with MPPT P and O. During transient phase, non-symmetrical faults are able to result an unbalance current/voltage greater than symmetrical faults. On symmetrical faults, MPPT Fuzzy is able to resultan average THD voltage/THD current smaller than MPPT P and O. Otherwise on non-symmetrical faults, MPPT P and O is able to resultan average THD voltage/THD current slightly smaller than MPPT Fuzzy. Both of MPPT P and O and MPPT Fuzzy on all short circuit faults during transient phase are able to result significantly smaller current average THD current than average THD voltage and limits of THD prescribed in IEEE 519. This research is simulated using Matlab/Simulink environment.
Stability and reliability of low voltage hybrid AC-DC microgrids power flow model in islanding operation hasti afianti; Ontoseno Penangsang; Adi Soeprijanto
Indonesian Journal of Electrical Engineering and Computer Science Vol 19, No 1: July 2020
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijeecs.v19.i1.pp32-41


The problem of decreasing and increasing power flow in hybrid AC-DC microgrids in island operations is the concern of this research. This condition arises if one sub-microgrid cannot supply load power requirements, either due to a decrease in power at the source or an increase in load on the sub-microgrid network. As a result, in this research used the bidirectional converter as an interlinking converter, the converter can change the power flow from the ac sub microgrid to the dc sub microgrid and vice versa. With this bidirectional converter, load power requirements can be met even though there is a power change in one of the sub microgrid. The simulation in this research support by Simulink/Matlab software. The model is built in a low voltage system, and the power flow analysis is in steady-state condition with two different cases. The simulation results show the stability and reliability of the power flow in both sub microgrid with stable frequency and voltage when power and load change occur.