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Phnom Penh, Cambodia

Pahal S.,ECE | Singh B.,National Institute of Technology Kurukshetra | Arora A.,Sun Eee Inc.
Optik | Year: 2014

To guarantee the QoS in real time applications in wireless networks, handover delay is one of the most important parameters to be considered while mobile users are changing their point of attachment to the access networks. This calls for a fast handover mechanism that will be able to offer uninterrupted services to mobile users. In this paper, a cross layer based fast handover mechanism is proposed to reduce handover delay and signaling load in IEEE 802.16e wireless metropolitan area networks. This is achieved by overlapping the functions of Medium Access Control (MAC) Layer and Internet Protocol (IP) layer. The analytical results show that the proposed mechanism significantly enhances the handover performance in terms of handover delay and signaling load thus resulting into fast handover. © 2014 Published by Elsevier GmbH. Source

Mahender K.,PE.SREC | Subhash B.,Sun Eee Inc.
Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics | Year: 2013

This paper presents a study to determine the optimal Location of a superconducting fault-current limiter (SFCL). The introduction of new generating facilities by independent power producers and increasing load demand can result in increased fault current. Due to the grid connection of the micro grids with the current power grids, excessive fault current is a serious problem to be solved for successful implementation of micro grids with SFCL. In this work a resistive superconducting fault current limiter designed. To reduce the fault current in the micro grid the designed SFCL placed in proposed system, which consists of a conventional power plant and 10MVA wind farm. The effect of SFCL on the micro grid, and optimal position for SFCL to get more reduction percentage of wind farm faults current. © 2013 IEEE. Source

Sastry P.N.V.M.,IT EDA Software Industry CELL and R and D | Rao D.N.,JBREC | Vathsal S.,Sun Eee Inc.
Proceedings - 2015 5th International Conference on Communication Systems and Network Technologies, CSNT 2015 | Year: 2015

The Aim is to HDL Design Implementation of 32x32 Port Wi-Fi Router for Complex NOC Computing Applications like Internet and cloud computing networks. This router is the main component in Network on Chip, the advantage is very simple and reliable for High Speed Parallel Distributed Pipe Line Data Processing Computing technique and very suit for complex NOC Computing application products 3G, 4G wireless Mobile Computing like Tablets, IPhones, Epads, Notebook Computers. The Importance and Usage of the router is for reduction of number of NOC components and Internet & Cloud traffic networks Complexity and Dataloss. This paper focuses on the Architecture Design and Implementation, Verification of 32 Port Router ASIC Card. The Building Blocks are Buffering Registers, Demultiplexers, FIFOs, and Schedulers. This Router Architecture Simulated by Xilinx ISE 9.2i/Altera Quartus II Software. Code written by using VHDL/Verilog HDL Programming & Debugging Done By Advanced Xilinx /Alter a / Cypress FPGA Development Board. © 2015 IEEE. Source

Devi P.S.,Andhra University | Santhi R.V.,Andhra University | Pushpalatha D.V.,Sun Eee Inc.
IFAC-PapersOnLine | Year: 2016

The present paper indicates a novel approach of LQR-Fuzzy controller to stabilize the frequency in all (normal and emergency) conditions under micro grid environment. Load Frequency Control (LFC) model plays a vital role in electric power system design and operation. From the literature, it is proven that the implementation of DR (Demand Response) is a key to the future micro grid. In practice, LFC-DR model is tuned by conventional controllers like PI, PD, PID controllers, with their fixed gains. However, they are incapable of obtaining good dynamic performance over a wide range of operating conditions and load changes. This paper presents an idea of introducing a DR control loop in the traditional LFC model (called LFC-DR) using Intelligent Controller for a power system. DR communication delay latency in the controller design is considered and is linearized using Padé approximation. The addition of DR control loop guarantees stability of the overall closed-loop system and effectively improves the system dynamic performance. Simulation results show that LQR- Fuzzy Logic Controller based LFC-DR single-area power system have better performance and superiority over a classical controller under any operating scenarios. © 2016, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved. Source

Kalaivani L.,Sun Eee Inc. | Subburaj P.,Sun Eee Inc.
2011 1st International Conference on Electrical Energy Systems, ICEES 2011 | Year: 2011

A fuzzy control scheme and adaptive neuro fuzzy inference system for torque-ripple minimization of switched reluctance machines is presented. The fuzzy parameters are initially chosen randomly and then adjusted to optimize the control. The controller produces smooth torque up to the motor base speed. The torque is generated over the maximum positive torque-producing region of a phase. This increases the torque density and avoids high current peaks. The controller is robust toward errors in the rotor position information, which means inexpensive crude position sensors can be used. This paper presents a novel method of controlling the motor currents to minimise the torque ripple based on a fuzzy logic current compensator. In the proposed controller, a compensating signal is added to the output in a current-regulated speed control-loop. The compensating signal is learned prior to normal operation, in a self-commissioning run, but the neuro-fuzzy methodology is also suitable for on-line self-learning implementation, for continuous improvement of the compensating signal presented. The controller shows good response in both cases. Performance of the proposed strategy is verified by simulation using MATLAB. © 2011 IEEE. Source

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