Volume 1 | Issue 3 |

 Abstract

In this paper the power factor correction technique is given by MATLAB Simulation model. In which the power factor correction model is containing the active power factor correction boost circuit with power factor angle control using logic circuits. There are the different techniques for power factor correction but in this paper the average current control scheme is adopted by comparing the hit crossing time of reference voltage and current signals. The MATLAB Simulation result shows the approach towards power factor correction and provided for better understanding for further modification.

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 Keywords

power factor correction model, MATLAB Simulation, logic circuits, hit crossing time.

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 Abstract

Software is currently used to control important aspects of our life like medical devices,automobiles, aircraft, manufacturing plants, nuclear generating stations, space exploration systems, elevators, electric motors, automated trains, banking transactions, telecommunications devices and a growing number of devices in industry and in our homes. Software is also used for critical systems. Now we can imagine if the software does not "control" what happens. Obviously, many of these systems have the potential to cause physical harm if they malfunction. Even if they do not cause physical harm their malfunctions are capable of causing financial and political chaos.

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Biometrics, automated identification, bio-signals, Multi modal biosignal processing, validation, robustness 1. INTRODUCTION

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This work presents a reiterative discrete Fourier transform (DFT) algorithem for fault current filtering. It presents damping technique through reiterative use of DFT. First, the short-windows DFT (SWDFT)-based mimic filter is developed to damp the measurement. Then, a reiterative scheme is proposed to reconstruct the damped measurement for further damping. The proposed algorithm can sufficiently damp the decaying dc as well as the subsynchronous frequency components. Thus, the proposed algorithm is appropriate to thefiltering design on both the conventional and series - compensated transmission lines. Meanwhile, the recursive form is developed to reduce the computational burden. The simulation results illustrate that the algorithm significantly reduces the time to obtain the accurate fundamental phasor and that it has abetter performance than the conventional DFT algorithm

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 Keywords

Damping, decaying dc component, discrete Fourier transform (DFT), mimic filter, subsynchronous frequency component

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The High speed micro wave communication link is requirement to fulfill the ever increasing tele-communication needs with high QoS at Low CoS. The systems developed till date is named as per their frequency of operation LF, MW, HF, V/UHF, Microwave and cellular communication.Latest of all is cellular communication and are of two types firstly GSM (Global System for Mobile Communication), Secondly CDMA (Coded Division Multiple Access). Both the systems are used for providing communication at all times/places. A boom is underway in case of GSM. Standard set developed by the European Tele communications Standards Institute (ETSI) to describe protocols for generation (2G). The GSM standard was developed as a replacement for (1G) first Generation cellular network & optimized for full duplex voice telephony. This was expanded over time for including data communication by Circuit switched transport, packet data transport via GPRS (General Packet Radio Services) and EDGE (Enhanced Data rates for GSM Evolution or EGPRS). Further improvements were made when the 3GPP developed third generation (3G) UMTS standards followed by fourth generation (4G) LTE Advanced standards. This paper explains the developments in the field of communication, services provided, causes of link degradation, the various methods used to overcome the problems and the advantagesof high speed microwave comunication

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Scope of the paper is about Implementations of energy Conservation technologies, case studiesrelated to installed systems adopted by industries. On Incorporating these energy converting mesures thereby minimizing the use of non-renewable energy resources, harmful CO gas & various toxic emissions exposed into atmosphere leading to environmental degradation could be subsequently controlled in industries

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In this study the performance of a residential air conditioning system having either a fin-and-tube condenser or a micro channel condenser is experimentally investigated. Micro channel heat exchangers offer a higher volumetric heat exschange capacity and a reduced refrigerant charge amount

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Fin Tube Heat Exchanger,Micro Channel Heat Exchanger

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In this paper I have discussed about communication types of communication, history of communication tools, pros and cons and advance IT communication tools. Earlier peoples were using drawings, hieroglyphics, smoke, brail, Morse code and the simple old letter in the post for communication but now peoples are using new technologies like telephone, telegraph, landline phone, mobile phone, e-mail, picture call, video call, social networking services such as facebook, msn, twitter. We can communicate through a computer by sending a message to someone. We can post bulletins or comments on some sites such as myspace, facebook, hi5, or twitter. Another way to communicate is by webcam. Webcam is installing a camera to our computer so that we and the other person can see each other while having a conversation. There also are some sites that we can text from. Yahoo is one of them. There is also im (instant messaging). The Internet provides users with multiple means of communicating. Users may communicate with friends, colleagues, news reporters, editors and even strangers. Today there are more ways to reach out to people who were traditionally difficult to contact. As technology advances, the means of Internet communications becomes increasingly convenient and varied.

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Communication, Internet, Conversation, Users, Technology.

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The principal information of power flow analysis is to find the magnitude and phase angle of voltage at each bus and the real and reactive power flowing in each transmission lines. Load flow study is a technique that provides basic calculation procedure in order to determine the characteristics of power system under steady state condition. In this thesis load flow study for 48-bus system is carried by using ETAP simulation software. A 400/220KV substation real time data is collected for the month of June -July 2011.The transient characteristic of power system is analyzed using short circuit analysis. A short circuit analysis is done to find the rating of circuit breakers. In this thesis symmetrical three-phase fault is considered. Short circuit analysis gives the DC offset current, circuit breaker making and breaking currents. The suitability of CB connected to existing system is observed using this technique. It is observed that CB near to fault trips the CB and protect the system from instability. In this thesis there is a scope to analysis the effect of unsymmetrical faults on power system during short circuit.

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ETAP simulationsoftware, DC offset current, Single line design by ETAP software diagram

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Most, if not all, cell phones rely on some form of GSM network for communication with the cell phone network, as well as connection to other cell phones and land GSM is the favored form of communication for cell phones, and providers that are based on it abound in areas like Europe andAsia.

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Creative Commons Attribution 4.0 and The Open Definition