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27,762 Article Results

DTC-SVM Control for Permanent Magnet Synchronous Generator based Variable Speed Wind Turbine

10.11591/ijpeds.v8.i4.pp1732-1743
Youness El Mourabit , Aziz Derouich , Abdelaziz El Ghzizal , Najib El Ouanjli , Othmane Zamzoum
In this paper, we are interested in improving the production efficiency for electric energy extracted from a wind turbine, based on a permanent magnet synchronous generator (PMSG) that we want to improve the performance by means of direct torque control with space vector modulation (DTC-SVM). The choice of this control comes from the deficiencies inherent to the conventional DTC, which includes variable switching frequency, torque ripple and implementation complexity. First we focuse on the wind energy conversion system (WECS) modeling using the PMSG machine, as well as the detailed study for the control DTC-SVM operating principle. Then, system performance is tested and compared by simulation in the MATLAB/Simulink in terms of follow instructions, robustness to the variations of the external system elements, and effectiveness of the expected method.
Volume: 8
Issue: 4
Page: 1732-1743
Publish at: 2017-12-01

Kalman Filter Algorithm Based Optimal Power Dispatch In Multinode System

10.11591/ijpeds.v8.i4.pp1863-1867
M. Vijay Albert William , M. Rajeev Kumar , K. Bhaskar , K. Durairaj
Deregulation can be characterized as the way toward evacuating the limitations and controls to accomplish focused discount costs without trading off sufficiency, framework dependability and security. In deregulation prepare there exist no. of purchasers and merchants. Where the offering and purchasing of force happen through various components is called control advertise. The utilization of the hereditary calculation to take care of the ideal power dispatch issue for a multi-hub sell off the market is proposed. The ideal power dispatch issue is a non-straight streamlining issue with a few requirements. The target of the proposed hereditary calculation is to amplify the aggregate member's advantage at all hubs in the framework. The proposed calculation is easy to execute and can undoubtedly consolidate extra requirements. The calculation was tried on a 17-hub, 26-line framework. The outcomes have demonstrated that the proposed calculation yields great outcomes that are steady with the run of the mill showcase conduct.Introduction in 1988 all electric power utilities all through the world worked with a hierarchical model in which one is controlling expert the utility worked the era, Transmission, and Distribution Systems situated in a fixed geographic region. Financial specialists for quite a while had addressed whether this syndication association was productive.
Volume: 8
Issue: 4
Page: 1863-1867
Publish at: 2017-12-01

Variable Body Biasing (VBB) based VLSI Design Approach to Reduce Static Power

10.11591/ijece.v7i6.pp3010-3019
Woo Wei Kai , Nabihah binti Ahmad , Mohamad Hairol bin Jabbar
The static power consumption is an important parameter concern in IC design due to t for a higher integration numbers of transistor to achieve greater performance in a single chip. Leakage current is the main issues for static power dissipation in standby mode as the size of transistor been scale. Therefore, the subthreshold leakage current rises due to threshold voltage scaling and gate leakage current increases due to scale down of oxide thickness. In this paper, a Variable Body Biasing (VBB) technique was applied to reduce static power consumption in VLSI design. The VBB technique used a DC bias at body terminal to control the threshold voltage efficiently. The Synopsys Custom Designer EDA tools in 90nm MOSFET technology was used to design a 1-bit full adder with VBB technique in full custom methodology. The simulation of 1-bit full adder was carried out with operation voltage   supply was compared in conventional technique and VBB technique. The results achieved the reduction in term of peak power,   and average power,   in static CMOS 1-bit full adder compared with conventional bias and VBB technique.
Volume: 7
Issue: 6
Page: 3010-3019
Publish at: 2017-12-01

Predictive Control of AC/AC Matrix Converter

10.11591/ijpeds.v8.i4.pp1932-1942
Siti Hajar Yusoff , Nur Shahida Midi , Sheroz Khan , Majdee Tohtayong
This work investigates the usage of Model Predictive Control (MPC) for a three phase conventional matrix converter with low pass filter at the input and output side. The conventional matrix converter has 3 input and 3 output which gives 27 switching state. From this design, a MPC is incorporate to control the output voltage and the input currents for all the phases. The design of the proposed controller is based on the input current controller and output voltage controller with load observer.  The proposed MPC using cost function will select the minimized switching state to be applied to next switching. This gives a sinusoidal output voltages and input currents. A simulation and experimental studies are presented to validate the proposed control scheme.
Volume: 8
Issue: 4
Page: 1932-1942
Publish at: 2017-12-01

The Effects of Nano Fillers on Space Charge Distribution in Cross-Linked Polyethylene

10.11591/ijece.v7i6.pp3147-3152
A. N. Ramani , A. M. Ariffin , Gobinath Vijian , Ahmad Basri Abd Ghani
The performance of polymeric insulation will be distorted by the accumulation of space charge. This will lead to local electric field enhancement within the insulation material that can cause degradation and electrical breakdown. The introduction of nanofillers in the insulation material is expected to reduce the space charge effect. However, there is a need to analyze potential nanofillers to determine the best option. Therefore, the objective of this research work is to examine two types of nanofillers for Cross-Linked Polyethylene (XLPE); Zinc Oxide (ZnO) and Acrylic (PA40). The effects of these nanofillers were measured using the Pulsed-Electro Acoustic (PEA) method. The development of space charge is observed at three different DC voltage levels in room temperature. The results show that hetero charge distribution is dominant in pure XLPE materials. The use of both nanofiller types have significant effect in decreasing the space charge accumulation. With nanofillers, the charge profile changed to homo-charge distribution, suppressing the space charge formation. Comparisonbetween both the nanofillers show that PA40 has better suppression performance than ZnO.
Volume: 7
Issue: 6
Page: 3147-3152
Publish at: 2017-12-01

A Novel Approach to Study the Effects of Anesthesia on Respiratory Signals by using the EEG Signals

10.11591/ijece.v7i6.pp3313-3317
Mohd Suhaib Kidwai , S. Hasan Saeed
General anesthesia plays a crucial role in many surgical procedures, and it therefore has an enormous impact on human health. There are no precise measures for maintaining the correct dose of anesthetic, and there is currently no fully reliable instrument to monitor depth of anesthesia. In this paper, a novel approach has been proposed for detecting the changes in synchronism of brain signals, taken from EEG machine. During the effect of anesthesia, there are certain changes in the EEG signals. Those signals show changes in their synchronism. This phenomenon of synchronism can be utilized to study the effect of anesthesia on respiratory parameters like respiration rate etc, and hence the quantity of anesthesia can be regulated, and if any problem occurs in breathing during the effect of anesthesia on patient, that can also be monitored.
Volume: 7
Issue: 6
Page: 3313-3317
Publish at: 2017-12-01

Control of Chaos in a Current Mode Controlled Buck Boost Converter Using Weak Periodic Perturbation Method

10.11591/ijpeds.v8.i4.pp1467-1480
P. Sriramalakshmi , A. Kavitha , P. Sanjeevikumar , Tole Sutikno , Pandav Kiran Maroti , Vigna K. Ramachandaramurthy
This paper analyses the nonlinear phenomena in current mode controlled buck-boost converter. The system undergoes various operating regions whenever there is a change in non linear elements presented in the system as well as in the loads. In this work, inductor current is considered as the reference for analysis.The results show that the converter enters into period-1, periodic doubling and chaotic regions as per the parameter (IL) variations.  The proposed control strategy, weak periodic perturbation (WPP) method tries to stabilize the system from the chaotic behavior.The buck boost converter along with the control system is simulated using MATLAB/SIMULINK software tool and the results are presented.The hardware implementation of the system is done and the results are verified with  the simulation results. It shows that the WPP can transform the system behaviour from the chaotic region to the periodic one. 
Volume: 8
Issue: 4
Page: 1467-1480
Publish at: 2017-12-01

Analysis and Evaluation of Performance Parameters of Modified Single Ended Primary Inductance Converter

10.11591/ijpeds.v8.i4.pp1585-1594
Hemalatha J N , Hariprasad S A , Anitha G S
The objective of this paper is to propose a modified Single Ended Primary Inductance converter topology with passive lossless snubber cell to achieve Zero Voltage Switching (ZVS) of the device near turn off and Zero Current Switching (ZCS) near turn on. By using the snubber cell effectively with the converter reduces the switching stress by restricting the large variations in voltage and current. The detailed analysis of the circuit with relevant waveforms of the circuit is described. The circuit is designed for a load of 100W at 12V output from an input source ranging between 20-30V. The circuit is modelled in MATLAB Simulink platform and the parameters are compared with conventional circuit. From the results it is shown that the proposed circuit operates at a lesser voltage stress and at higher efficiency than conventional one.
Volume: 8
Issue: 4
Page: 1585-1594
Publish at: 2017-12-01

Agricultural Management through Wireless Sensors and Internet of Things

10.11591/ijece.v7i6.pp3492-3499
Sridevi Navulur , A. S. C. S. Sastry , M. N. Giri Prasad
Agriculture plays a significant role in most countries and there is an enoromous need for this industry to become “Smart”. The Industry is now moving towards agricultural modernization by using modern smart technologies to find solutions for effective utilization of scarce resources there by meeting the ever increasing consumtion needs of global population. With the advent of Internet of Things and Digital transformation of rural areas, these technologies can be leveraged to remotely monitor soil moisture, crop growth and take preventive measures to detect crop damages and threats. Utilize artificial intelligence based analytics to quickly analyze operational data combined with 3rd party information, such as weather services, expert advises etc., to provide new insights and improved decision making there by enabling farmers to perform “Smart Agriculture”. Remote management of agricultural activities and their automation using new technologies is the area of focus for this research activity. A solar powered remote management and automation system for agricultural activities through wireless sensors and Internet of Things comprising, a hardware platform based on Raspberry Pi Micro controller configured to connect with a user device and accessed through the internet network. The data collection unit comprises a set of wireless sensors for sensing agricultural activities and collecting data related to agricultural parameters; the base station unit comprising: a data logger; a server; and a software application for processing, collecting, and sending the data to the user device. The user device ex: mobile, tablet etc. can be connected to an internet network, whereby an application platform (mobile-app) installed in the user device facilitates in displaying a list of wireless sensor collected data using Internet of Things and a set of power buttons. This paper is a study and proposal paper which discusses the factors and studies that lead towards this patent pending invention, AGRIPI.
Volume: 7
Issue: 6
Page: 3492-3499
Publish at: 2017-12-01

QoS based Admission Control using Multipath Scheduler for IP over Satellite Networks

10.11591/ijece.v7i6.pp2958-2969
Lukman Audah , Zhili Sun , Haitham Cruickshank
This paper presents a novel scheduling algorithm to support quality of service (QoS) for multiservice applications over integrated satellite and terrestrial networks using admission control system with multipath selection capabilities. The algorithm exploits the multipath routing paradigm over LEO and GEO satellites constellation in order to achieve optimum end-to-end QoS of the client-server Internet architecture for HTTP web service, file transfer, video streaming and VoIP applications. The proposed multipath scheduler over the satellite networks advocates load balancing technique based on optimum time-bandwidth in order to accommodate the burst of application traffics. The method tries to balance the bandwidth load and queue length on each link over satellite in order to fulfil the optimum QoS level for each traffic type. Each connection of a traffic type will be routed over a link with the least bandwidth load and queue length at current time in order to avoid congestion state. The multipath routing scheduling decision is based on per connection granularity so that packet reordering at the receiver side could be avoided. The performance evaluation of IP over satellites has been carried out using multiple connections, different file sizes and bit-error-rate (BER) variations to measure the packet delay, loss ratio and throughput.
Volume: 7
Issue: 6
Page: 2958-2969
Publish at: 2017-12-01

Modeling and Execution the Control Strategy for the Three-Level Rectifier Based on Voltage Oriented Control

10.11591/ijpeds.v8.i4.pp1603-1611
K. Y. Ahmed , N. Z. Yahaya , K. Ramani , V.S. Asirvadam
In the recent years, three-level rectifier becomes an attractive rectifier replaced the two-level rectifiers. This rectifier provides many advantages, such as sinusoidal input current which contains low harmonics, unity power factor, bi-directional power flow, low voltage and switching loss for each switch. This paper presents a modelling and execution of the three-level rectifier for improvement of power quality under different loading based on voltage oriented control. The mathematical model and the control design were presented in this paper for the current inner loop and voltage outer loop, respectively. In order to evaluate the operation of the three-level rectifier under different conditions, the model was simulated by using MATLAB/Simulink. The experiment has been used to confirm the operation of the rectifier and its controller. The simulation and experimental results show that the excellent performance under steady-state and dynamic load variations was achieved; the unity power factor and pure sinusoidal in the grid side has also been accomplished.
Volume: 8
Issue: 4
Page: 1603-1611
Publish at: 2017-12-01

Analysis of Electric Field and Current Density on XLPE Insulator

10.11591/ijece.v7i6.pp3095-3104
M. H. M. Sharif , N. A. M. Jamail , N. A. Othman , M. S. Kamarudin
Good condition and size of the insulator are important to ensure the excellent electric field and current density performance because of aging and degradation HVDC cable problem. At present, the existing insulator which is XLPE insulator that had been used does not meet the capabilities criteria of HVDC cable due to the problem in terms of the condition of the insulator which is the presence of a void in the insulator. A research had been made with Quickfield Software to calculate the electric field and current density in the XLPE insulator of HVDC cable. A void is created in the XLPE insulator by using Quickfield Software by varying diameter of void and distance of void from conductor. XLPE insulator is taken as main research object. The results show that largest diameter of void and nearest distance of void from conductor distorts highest electric field and lowest current density. Therefore, it is important to study both electric field and current density to ensure good capabilities and safety of HVDC cable.
Volume: 7
Issue: 6
Page: 3095-3104
Publish at: 2017-12-01

A Review of Social Media: In Future

10.11591/ijeecs.v8.i3.pp670-673
Sheth Tarik Mahendra Kumar
Most recent couple of years a few new systems administration locales wound up plainly famous (WhatsApp, Google Plus, Instagram), the utilization base developed significantly, and Facebook purchased over some of its opposition. The development of online networking alongside the fast development of advanced mobile phone use has likewise had an incredible effect on different features of our lives. This period additionally observed an extraordinary measure of overviews being led on the development of SNS, how individuals and organizations utilize them, and what are the effects caused by this media. In this paper, we introduce and break down the study comes about, and the effect it has caused on the organizations and society on the loose. We likewise concentrate on a portion of the particular sections of the general public while breaking down the effect. Further, we likewise have talked about the eventual fate of long range informal communication, how the advantages can be used for the improvement of the group, including training field, and furthermore the significance of taking essential care in order to keep away from the genuine negative effects of SNS. 
Volume: 8
Issue: 3
Page: 670-673
Publish at: 2017-12-01

Comparisional Investigation of Load Dispatch Solutions with TLBO

10.11591/ijece.v7i6.pp3246-3253
DSNM Rao , Niranjan Kumar
This paper discusses economic load dispatch Problem is modeled with non-convex functions. These are problem are not solvable using a convex optimization techniques. So there is a need for using a heuristic method. Among such methods Teaching and Learning Based Optimization (TLBO) is a recently known algorithm and showed promising results. This paper utilized this algorithm to provide load dispatch solutions. Comparisons of this solution with other standard algorithms like Particle Swarm Optimization (PSO), Differential Evolution (DE) and Harmony Search Algorithm (HSA). This proposed algorithm is applied to solve the load dispatch problem for 6 unit and 10 unit test systems along with the other algorithms. This comparisional investigation explored various merits of TLBO with respect to PSO, DE, and HAS in the field economic load dispatch.
Volume: 7
Issue: 6
Page: 3246-3253
Publish at: 2017-12-01

Modified Projective Synchronization of Chaotic Systems with Noise Disturbance, an Active Nonlinear Control Method

10.11591/ijece.v7i6.pp3436-3445
Hamed Tirandaz , Mohsen Ahmadnia , Hamid Reza Tavakoli
The synchronization problem of chaotic systems using active modified projective nonlinear control method is rarely addressed. Thus the concentration of this study is to derive a modified projective controller to synchronize the two chaotic systems. Since, the parameter of the master and follower systems are considered known, so active methods are employed instead of adaptive methods. The validity of the proposed controller is studied by means of the Lyapunov stability theorem. Furthermore, some numerical simulations are shown to verify the validity of the theoretical discussions. The results demonstrate the effectiveness of the proposed method in both speed and accuracy points of views.
Volume: 7
Issue: 6
Page: 3436-3445
Publish at: 2017-12-01
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