Presented by
Ahmed A. Helal


DVR Design Procedure
The design procedure can be divided into
 The power circuit design
 The control Algorithm
The power circuit is composed of;
 Injection transformers
 Filter
 inverter
 DC source
The following data are the same for the simulation and the practical system;
 Source: Vs = 110 V (line to line)
Zs = 1.3 Ω
 Load: three phase balanced load 120 Ω per phase
 Filter: L = 370 µH
C = 90 µF
 Injection transforme ....etc

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

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A High Input Voltage Three-Phase ZVZCS DC-DC Converter with Vin /3 Voltage Stress on Primary Switches
Abstract
A high-voltage three-phase ZVZCS dc-dc converterwith low voltage stress is presented in this paper. The voltagestress on the primary switches is only one-third of the inputvoltage. By using the phase shift pulsewidth modulation (PWM)and secondary snubber, four of the six primary switches areoperating with zero-voltage switching (ZVS) and two of them areoperating with zero-current switching (ZCS), in order to reducethe switch ....etc

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circuit diagram of over under voltage protection of electrical applications ....etc

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i want over voltage and under voltage protection doc for mini project please help me ....etc

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PRESENTED BY:
Heemanshu das






INTRODUCTION
With the rapid development of power system, especially the increased use of transmission facilities due to higher industrial output and deregulation, it becomes necessary to explore new ways of maximizing power transfer in existing transmission facilities, while at the same time maintaining the acceptable levels of the network reliability and stability. On the other hand, the fast development of power electronic technology has m ....etc

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DYNAMIC VOLTAGE RESTORER
Power Quality (PQ) is an important measure of an electrical power system. The term PQ means to maintain purely sinusoidal current wave form in phase with a purely sinusoidal voltage wave form. The power generated at the generating station is purely sinusoidal in nature. The deteriorating quality of electric power is mainly because of current and voltage harmonics due to wide spread application of static power electronics converters, zero and negative sequence components originated b ....etc

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Study of Evaluated a STATCOM Application for Voltage Stability by Dynamic PV Curves and Time Simulations
Abstract:
In this paper; voltage stability is evaluated by both
dynamic PV curves and titne-domain simiilations. considering the
combined a'ynamic contsol effects of a static compensator
(Sl:4TCOA.I) and transfosnier on-load-taps (OLT). The studied
system is heavily loaded at hvo locations and an 80 Mvar
SPITCOM is connected to impsore the voltage stability of entire
system for a contingency of a three-tesminal line o ....etc

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name dinesh
mini projet report
Voltage source inverters (VSI) have been widely used in uninterruptible power supplies, unified power flow controllers or unified power quality conditioners, and distributed generation systems (DGS). VSIs are inherently efficient, compact, and economical devices used to control power flow and provide quality supply. VSIs can be classified as voltage-controlled VSIs (VCVSIs) and current-controlled VSIs (CCVSIs), depending on their control mechanism. In this paper, a detailed comparison of VCVSIs and CCVSIs for DG ....etc

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PRESENTED BY:
Harish.B, Justinraj.G


Low Power Consumption Using Dynamic Voltage Frequency Scaling
Abstract:
An effective mechanism for reducing processor power and energy.
In the last decade a lot of works have been done during the hardware and software implementation.
In this paper a proposed control loop of DVFS technique has been introduced.
Introduction:
In recent years the processors speed reaches Gigahertz, so the power dissipation increases rapidly in a level of the order of ten ....etc

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