Abstract
This paper describes modelling and testing of a
digital distance relay for transmission line protection using
MATLAB/SIMULINK. SIMULINK s Power System Blockset
(PSB) is used for detailed modelling of a power system
network and fault simulation. MATLAB is used to implement
programs of digital distance relaying algorithms and to serve
as main software environment. The technique is an
interactive simulation environment for relaying algorithm
design and evaluatio ....etc

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sir i m BTECH,FINAL YEAR electrical engineering student from IET,LUCKNOW i m working with the pid control based single phase inverter design project so i m in need of simlink model of pwm inverter with steps for making my project so from your side i need your help .
pawan sharma ....etc

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to get information about the topic over under voltage protection relay full report ppt and related topic refer the page link bellow

http://seminarsprojects.net/Thread-over-under-line-voltage-protection-for-electrical-appliances

http://seminarsprojects.net/Thread-over-under-voltage-cut-off-with-on-time-delay-project-report?pid=16282&mode=threaded

http://seminarsprojects.net/Thread-generator-protection-in-bpcl-kochi-full-report?pid=12056&mode=threaded ....etc

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REGULATED POWER SUPPLY
1.1 Types of Power Supply
There are many types of power supply. Most are designed to convert high voltage AC mains electricity to a suitable low voltage supply for electronic circuits and other devices. A power supply can by broken down into a series of blocks, each of which performs a particular function.
For example a 5V regulated supply:
Figure 1.1 block diagram of a regulated power supply
Each of the blocks is described in more detail:
Transformer- steps down high voltage AC mains ....etc

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circuit diagram of over under voltage protectn of electrical applicatins using lm324 ....etc

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Underfrequency Protective Relay

The underfrequency relay (fig. 4-16) is a solidstate device that functions to protect the load in the event generator frequency decreases below preset limits. It actuates when the frequency decreases to 55 hertz for 60-hertz operation and 46 hertz for 50-hertz operation. Upon actuation, contacts within the relay close to signal the annunicator and open to de-energize the generator breaker (contactor), resulting in a display of the fault condition and removal of the load from the generator.

Frequency sensing ....etc

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Abstract

In this paper, a simulation test bed for narrowband Power Line Communications (PLC) is demonstrated. The method is able to quickly assess the performance of modulation schemes for an arbitrary network constructed in the ATP-EMTP software, both for point to point and for multi-point to point communication. Demodulation is carried out in MATLAB. The test setup is used to implement Orthogonal Division Multiplexing (OFDM) on a number of typical medium voltage (MV) distribution networks. The simulation results show that with a considered ....etc

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Abstract

This paper illustrates modeling and simulation of overvoltage and undervoltage protection scheme. The method is based upon the operation of relay under overvoltage and undervoltage faults. The term power quality is used to describe as the quality of power that is given as input to various electrical load and ability of load to function properly. Without proper power the devices may misoperate or fail. There are many ways in which electric power can be poor quality and many more causes for such poor quality. Among the various power qua ....etc

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I want to preaperd to a seminar ppt on this topic,
so i want to some data here.please give me some data.
thanks ....etc

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To get full information or details of under voltage relay manual please have a look on the pages

http://seminarsprojects.net/Thread-over-under-voltage-protection-relay

http://seminarsprojects.net/Thread-auto-reset-over-under-voltage-cut-out-by-using-relay

if you again feel trouble on under voltage relay manual please reply in that page and ask specific fields in under voltage relay manual ....etc

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