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Battery energy storage system (BESS) design for peak demand reduction, energy arbitrage and grid ancillary services

10.11591/ijpeds.v11.i1.pp398-408
Wan Syakirah Wan Abdullah , Miszaina Osman , Mohd Zainal Abidin Ab Kadir , Renuga Verayiah
Renewable Energy (RE) penetration is a new phenomenon in power systems. In the advent of high penetration of RE in the systems, several issues have to be addressed especially when it involves the stability and flexibility of the power systems. Battery Energy Storage System (BESS) has gained popularity due to its capability to store energy and to serve multiple purposes in solving various power system concerns. Additionally, several BESS can be combined to operate as Virtual Power Plant (VPP). This study will involve the design and implementation of BESS for five potential customer sites for the demonstration project and to be possibly integrated into one VPP system. The study is expected to demonstrate bill savings to the customers with BESS due to peak demand reduction and energy arbitrage savings.Renewable Energy (RE) penetration is a new phenomenon in power systems. In the advent of high penetration of RE in the systems, several issues have to be addressed especially when it involves the stability and flexibility of the power systems. Battery Energy Storage System (BESS) has gained popularity due to its capability to store energy and to serve multiple purposes in solving various power system concerns. Additionally, several BESS can be combined to operate as Virtual Power Plant (VPP). This study will involve the design and implementation of BESS for five potential customer sites for the demonstration project and to be possibly integrated into one VPP system. The study is expected to demonstrate bill savings to the customers with BESS due to peak demand reduction and energy arbitrage savings.
Volume: 11
Issue: 1
Page: 398-408
Publish at: 2020-03-01

Electrical profile of ultra violet (UV) curable renewable polymer graphite (PG) composites

10.11591/ijpeds.v11.i1.pp459-465
Nur Munirah Abdullah , A. Z. M. Rus , M. F. L. Abdullah , Hanani Abd Wahab
The electrical profiles of the renewable polymer graphite (PG) composites upon ultra violet (UV) curing were investigated. Renewable PG films were prepared by mixing with varying weight percent of graphite (with an increment of 5 wt. % of prepared graphite) up to 30 wt.% and crosslinker. Then, the composites solution was slip casted and cured upon stimulated UV irradiation (UV accelerated weathering tester) at different time exposure (up to 1000 hours) was applied. Small changes on the functional groups of the composites were observed due to UV exposure time by Fourier Transform Infrared Spectroscopy (FTIR). Suggesting that chemical crosslink and chain scissions occurred within renewable polymer graphite composites. Further electrical profile through two point probe and four point probe method recorded visibly fluctuating values for both resistivity and conductivity within its composites range. Proposed here that the removal of organic contaminants and weak materials form both renewable polymer and graphite particles through the UV curing may have an effect on the formation of conductive network stability. 
Volume: 11
Issue: 1
Page: 459-465
Publish at: 2020-03-01

High speed transmission of signal level for white light emitting diode (LED) as a transmitter device by using modified phase equalization

10.11591/ijeecs.v17.i3.pp1348-1354
Maad Mohsin Mijwil
Visible light communication (VLC) also known as "Li-Fi", uses standard LEDs to transmit data such as information, images, music, and videos. The first LED was developed in 1927 by Oleg Vladimírovich Lósev (1903-1942), however it was not used in the industry until the 1960s.In this paper, will describe the implementation of Modified Phase Equalization (MPH) on visible white LED lamps signal because it's has slow transition time that severely limits in the communication system data speeds with phase equalization that increases the bandwidth of the LED modulation. Employ two filters with Modified Phase Equalization: first, Complementary (C) filter to combine between all kinds moving signals and second, finite impulse response (FIR) filter to obtain all coefficients that respective. Implementation in two phases: first, frequency 150KHz with number of signals 15000 signals and second, doubling frequency 300KHz with number of signals 30000 signals of LEDs without losing their main functionality as illumination sources.
Volume: 17
Issue: 3
Page: 1348-1354
Publish at: 2020-03-01

Remote monitoring of a premature infants incubator

10.11591/ijeecs.v17.i3.pp1232-1238
Ali Ghazi Shabeeb , Ali Jaber Al-Askery , Zainab Majid Nahi
In this paper, the air temperature and humidity levels in the infant' incubator are monitored remotely by means of Arduino microcontroller with different sensors and an open source internet of things (IoT) applications. The system is connected to a network via a wireless fidelity (Wi-Fi) connection to be linked to an application on the smart phone or to the computer. The system is designed using Arduino microcontroller, DHT11/DHT22 sensor for measuring the body parameters, such as the temperature and the humidity, LCD monitor, ESP8266 WiFi modules, and NodeMCU-v3.The results have shown that real time updated medical records can be transferred to the medical staff utilizing ThingSpeak IoT applications.
Volume: 17
Issue: 3
Page: 1232-1238
Publish at: 2020-03-01

Effects of shorter phase-resolved partial discharge duration on PD classification accuracy

10.11591/ijpeds.v11.i1.pp326-332
Chong Wan Xin , Wong Jee Keen Raymond , Hazlee Azil Illias , Lai Weng Kin , Yiauw Kah Haur
Partial discharge (PD) pattern recognition is useful to diagnose insulation condition. PD measurement data is commonly represented in phase-resolved partial discharge (PRPD) format. PRPD is useful as it provides a visible pattern for different PD source and various features can be extracted for PD pattern recognition. Shorter PRPD duration will enable more training data but the information in each data is less and vice versa. This works aims to investigate the effects of using very short duration PRPD data on the accuracy of PD pattern recognition. The results conclude that machine learning models such as Artificial Neural Network (ANN) and Support Vector Machine (SVM) are robust enough such that reduction of PRPD duration from 15-seconds to 1-second causes less than 5 % drop in the classification accuracy. However, this is only true for noise free condition. When the same PD data is overlapped with random noise, the classification accuracy suffers a significant reduction up to 19%. Therefore, longer PRPD duration is recommended to withstand the effects of noise contamination.
Volume: 11
Issue: 1
Page: 326-332
Publish at: 2020-03-01

Elimination of interharmonic currents by a FAP using the technique of compensation global

10.11591/ijpeds.v11.i1.pp228-234
Mohamed Ali Moussa , Bachir Belmadani , Ahmed Wahid Belarbi , Rachid Taleb
This document is a contribution to improve the quality of electrical energy in the distribution network.In this article we will present a method that allows us to clean up in a very considerable way the electrical network of both harmonics and inter harmonics provoked, basically by the ultrafast switches used when controlling a PWM inverter supplying a three-phase asynchronous motor. We notice that this method can be generalized for other loads creating inter-harmonics.This proposed method was simulated using the MATLAB/SIMULINK software and had given remarkable results (there is a considerable reduction in total harmonic distortion (THD) of source current from 29.52% to 0.82%)
Volume: 11
Issue: 1
Page: 228-234
Publish at: 2020-03-01

The effect of proficiency pairings on EFL students’ writing ability in genre-based approach context

10.11591/ijere.v9i1.20439
Ani Susanti , Utami Widiati , Bambang Yudi Cahyono
This study aimed to know if students who work in heterogeneous (HET) pairs have significantly better writing ability than those who experience working in homogenous (HOM) pairs. This study involved two intact classes that consist of 40 EFL students taking the Intermediate Reading and Writing course in the English Education Department in one of the large private universities in Indonesia. This study employed a causal-comparative design and lasted for twelve meetings including pretest and posttest. The two groups of HET pairs and HOM pairs experienced collaborative writing activities following the steps of the Genre-based Approach. The data were collected through writing pre-test and post-test. The data were analyzed using descriptive statistics and Mann Whitney to compare the students’ post-test scores. The findings show that both high and low proficiency students who experienced collaborative writing in homogenous proficiency pairings have better writing ability than those who experienced collaborative writing in heterogeneous proficiency pairings. This indicates that pair collaboration can support language learning more optimally when there are no large proficiency gaps among pairs.
Volume: 9
Issue: 1
Page: 245-251
Publish at: 2020-03-01

Iris segmentation using a new unsupervised neural approach

10.11591/ijai.v9.i1.pp58-64
Hicham Ohmaid , S. Eddarouich , A. Bourouhou , M. Timouyas
A biometric system of identification and authentication provides automatic recognition of an individual based on certain unique features or characteristic possessed by an individual. Iris recognition is a biometric identification method that uses pattern recognition on the images of the iris. Owing to the unique epigenetic patterns of the iris, Iris recognition is considered as one of the most accurate methods in the field of biometric identification. One of the crucial steps in the iris recognition system is the iris segmentation because it significantly affects the accuracy of the feature extraction the iris. The segmentation algorithm proposed in this article starts with determining the regions of the eye using unsupervised neural approach, after the outline of the eye is found using the Canny edge, The Hough Transform is employed to determine the center and radius of the pupil and the iris.
Volume: 9
Issue: 1
Page: 58-64
Publish at: 2020-03-01

Comparative study of new MPPT control approaches for a photovoltaic system

10.11591/ijpeds.v11.i1.pp251-262
Ahmed Haddou , Nour-Eddine Tariba , Naima Ikken , Abdelhadi Bouknadel , Hafsa EL Omari , Hamid El Omari
The output characteristics of the photovoltaic (PV) installation normally depend on solar radiation and ambient temperature, the charge impedance, its maximum power point (MPP) is not constant. In each state of the PV module has a point where it can produce its MPP. Therefore, MPPT (Maximum Power Point Tracking) methods can be used to keep the photovoltaic panel running on its MPP. In this article, the objective was to determine how the different maximum point power monitoring (MPPT) techniques applied to PV systems work. Therefore, two MPPT algorithms are presented and compared under different temperature and radiation conditions: MRAC methods and sliding mode controller combined with the Incremental Conductivity (IC) algorithm. These algorithms are widely used in PV systems because of their easy implementation and low cost. These techniques were analyzed and their performance evaluated using the PSIM software under different types of solar radiation and temperature.
Volume: 11
Issue: 1
Page: 251-262
Publish at: 2020-03-01

Islanding detection of integrated distributed generation with advanced controller

10.11591/ijeecs.v17.i3.pp1626-1631
J Rajesh Reddy , A Pandian , R Dhanasekaran , Rami Reddy Ch , B Prasanna Lakshmi , B Neelima Devi
Grid integration of non conventional energy resources is increasing in day to day life to supply the global energy utilization requirement. The major problem with such integrated Distributed Generation (DG) is islanding. The islanding is originated in the integrated system when a part of the power system is disconnected from the grid and continue to feed the local load. The islanding is not safe to field persons and equipment. As per IEEE 1547 standards, the islanding should be detected within 2 seconds with the equipments associated with it. In this paper, a new islanding detection method is proposed with fuzzy rule based approach with inputs as the change in frequency and power. This method classifies the islanding and non islanding events efficiently compared to other passive methods. The simulations are carried on Matlab/ Simulink 2018b environment.
Volume: 17
Issue: 3
Page: 1626-1631
Publish at: 2020-03-01

Large-scale image-to-video face retrieval with convolutional neural network features

10.11591/ijai.v9.i1.pp40-45
Imane Hachchane , Abdelmajid Badri , Aïcha Sahel , Yassine Ruichek
Convolutional neural network features are becoming the norm in instance retrieval. This work investigates the relevance of using an of the shelf object detection network, like Faster R-CNN, as a feature extractor for an image-to-video face retrieval pipeline instead of using hand-crafted features. We use the objects proposals learned by a Region Proposal Network (RPN) and their associated representations taken from a CNN for the filtering and the re-ranking steps. Moreover, we study the relevance of features from a finetuned network. In addition to that we explore the use of face detection, fisher vector and bag of visual words with those CNN features. We also test the impact of different similarity metrics. The results obtained are very promising.
Volume: 9
Issue: 1
Page: 40-45
Publish at: 2020-03-01

Stabilization of the stator and rotor flux linkage of the induction motor in the asynchronous electric drives with frequency regulation

10.11591/ijpeds.v11.i1.pp213-219
Vladimir L. Kodkin , Aleksandr Sergeevich Anikin , Aleksander Aleksandrovich Baldenkov
The article is a continuation of the authors' work in research, mainly experimental, asynchronous electric drives with frequency regulation (AED FR) of hoisting-and-transport mechanisms, in which for constructive, operational and other reasons it is difficult to install additional sensors, for example encoders. The results of the analysis of the dynamics of AED FR with two types of sensorless control: vector and scalar are presented in this article. The study was conducted by mathematical modeling in the Simulink application of the MatLab software using standard control system models. The processes of sequential acceleration of the engine to fixed speeds with overload and load shedding on each of them were simulated. At the same time, the speed and effective values of the flux linkages of the rotor and stator and the stator current were monitored, by which the dynamics and efficiency of each type of control were evaluated. As in experimental studies, the dynamic and efficiency of a more stable scalar control was significantly improved by the use of dynamic positive feedback on stator current.
Volume: 11
Issue: 1
Page: 213-219
Publish at: 2020-03-01

DeepOSN: Bringing deep learning as malicious detection scheme in online social network

10.11591/ijai.v9.i1.pp146-154
Putra Wanda , Marselina Endah Hiswati , Huang J. Jie
Manual analysis for malicious prediction in Online Social Networks (OSN) is time-consuming and costly. With growing users within the environment, it becomes one of the main obstacles. Deep learning is growing algorithm that gains a big success in computer vision problem. Currently, many research communities have proposed deep learning techniques to automate security tasks, including anomalous detection, malicious link prediction, and intrusion detection in OSN. Notably, this article describes how deep learning makes the OSN security technique more intelligent for detecting malicious activity by establishing a classifier model.
Volume: 9
Issue: 1
Page: 146-154
Publish at: 2020-03-01

Formant characteristics of Malay vowels

10.11591/ijere.v9i1.20421
Izzad Ramli , Nursuriati Jamil , Norizah Ardi
The purpose of this study was to investigate and examined the eight vowels formant characteristic of Malay language. Previous research of Malay language only investigated six basic vowels /a/, /e/, /i/, /o/, /u/, /ə/. The vowels /ɔ/, /ε/ that usually exist in a dialect were not included in the previous investigations. In this study, the vowels sound were collected from five men and four women producing the vowels /a/, /e/, /i/, /o/, /u/, /ə/, /ɔ/, /ε/ from different regions and dialects in Malaysia. Formant contours, F1 until F4 of the vowels were measured using interactive editing tool called Praat. Analysis of the formant data showed numerous differences between vowels in terms of average frequencies of F1 and F2, and the degree of overlap among adjacent vowels. When compared with the International Phonetic Alphabet (IPA), most pronunciation of the Malay vowels were at the same position but the vowel /ε/ seen more likely to become a front vowel instead of a central vowel. Consequently, vowel features of the two Malay allophones /ɔ/ and /ε/ were documented and added to the IPA vowel chart. The findings form the fundamental basis for further research of speech synthesis, speech rehabilitation and speech reproduction of the Malay language.
Volume: 9
Issue: 1
Page: 144-152
Publish at: 2020-03-01

Renewable energies evaluation and linking to smart grid

10.11591/ijpeds.v11.i1.pp107-118
Benouaz Idriss Yassine , Allaoua Boumediene
To tackle the widespread challenges encountered during the management of power flow in electrical networks, the integration of smart grid (S.G)is proposed as a viable solution to address the environmental and economic concerns. In order to enhance overall functionality of the electric power delivery system, operation of the smart grid is governed by data-driven algorithms where various sensors and smart meters are used to collect this data. On other hand, the fluctuating cost of fossil fuels and its negative impact on the environment has incentivized the exploitation of renewable energies in the smart grid. In the present paper, a hybrid Photovoltaic/Wind (PV/Wind) is suggested to supply a smart grid. The objective of this study is to asses the feasibility of a smart grid supplied solely by renewable energy sources. Conceptual standings of this newly suggested model are validated by simulations.
Volume: 11
Issue: 1
Page: 107-118
Publish at: 2020-03-01
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