نتایج جستجو برای: voltage profile

تعداد نتایج: 326068  

Journal: :energy equipment and systems 0
ghazanfar shahgholian islamic azad university, isfahan, iran noushaz izadpanahi islamic azad university, isfahan, iran

using the facts controllers, such as static synchronous compensator (statcom), as it provides continuous reactive power, in the grid including wind turbine (wt) equipped with doubly fed induction generator, for improving voltage profile (under normal circumstances) and providing a transition ability from inductor generator transition state has been proposed. in this paper, in order to control t...

In this paper, the Static Var Compensator (SVC) has been used to improve dynamic behaviour of power system. To do this, a new objective function is formulated considering power loss reduction, voltage profile improvement and loadability margin decrease. Other contribution of this research is proposing a novel structure for Particle Swarm Optimization (PSO) algorithm through modifying the initia...

The harmonic in distribution systems becomes an important problem due to an increase in nonlinear loads. This paper presents a new approach based on a graph algorithm for optimum placement of passive harmonic filters in a multi-bus system, which suffers from harmonic current sources. The objective of this paper is to minimize the network loss, the cost of the filter and the total harmonic disto...

پایان نامه :دانشگاه آزاد اسلامی واحد علوم پزشکی تهران - دانشکده پزشکی 1389

هدف : هدف از این پایان نامه بررسی تغییرات الکترورتینوگرام در بیماران مبتلا به گلوکوم است . زیرا گلوکوم بیماری است که اگر دیر تشخیص داده شود یا درمان نشود منجر به کوری می شود . روش مطالعه : این مطالعه یک مطالعه مشاهده ای – توصیفی – تحلیلی – مقطعی طراحی شده که نمونه شامل 25 فرد مبتلا به گلوکوم و 25 فرد سالم بوده است نمونه ها بصورت تصادفی ساده از بین مراجعین به بیمارستان های آموزشی دانشگاه آزا...

Journal: :CoRR 2011
Michael Chertkov Scott Backhaus K. Turtisyn Vladimir Y. Chernyak Vladimir Lebedev

We consider a model of a distribution feeder connecting multiple loads to the sub-station. Voltage is controlled directly at the head of the line (sub-station), however, voltage anywhere further down the line is subject to fluctuations, caused by irregularities of real and reactive distributed power consumption/generation. The lack of a direct control of voltage along the line may result in the...

2015
Sudhir Sharma Rahul Sharma

Abstract—The present work is an attempt to reduce the power loss and to improve the voltage profile on an existing 11 kV feeder by implementing different techniques. Simulations are performed using Mipower software on an existing 11 kV feeder (Aggarwal feeder) of industrial area Kapurthala. In this work effects of changing type of feeder are simulated to investigate the reduction in power loss ...

Reactive power dispatch for voltage profile modification has been of interest Abstract to powerr utilities. Usually local bus voltages can be altered by changing generator voltages, reactive shunts, ULTC transformers and SVCs. Determination of optimum values for control parameters, however, is not simple for modern power system networks. Heuristic and rather intelligent algorithms have to be so...

2016
R. K. Santhi R. A. Jabr R. Singh J. A. Taylor L. W. de Oliveira E. J. de Oliveira F. V. Gomes I. C. Silva A. L. M. Marcato S. H. Mirhoseini S. M. Hosseini M. Ghanbari

Network reconfiguration aims to minimize network real power loss through rearranging the status of open switches. The consumers of the distribution networks need a better voltage profile for efficient operation of various gadgets. This paper thus attempts to develop a new reconfiguration algorithm with an objective of improving the voltage profile of the distribution network without incurring a...

2005
Huizhan Yi Xuejun Yang Juan Chen

Compiler-directed dynamic voltage scaling (DVS) is an effective low-power technique in real-time applications, where compiler inserts voltage scaling points in a real-time application, and supply voltage and clock frequency are adjusted to the relationship between the remaining time and the remaining workload at each voltage scaling point. Greedy dynamic voltage scaling is one of the voltage ad...

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