نتایج جستجو برای: voltage and reactive power control

تعداد نتایج: 17101386  

2008
Venkataramana Ajjarapu A. P. Sakis Meliopoulos

(PSERC) is a multi-university Center conducting research on challenges facing the electric power industry and educating the next generation of power engineers. More information about PSERC can be found at the Center's website: Notice Concerning Copyright Material PSERC members are given permission to copy without fee all or part of this publication for internal use if appropriate attribution is...

2017
Peter W. Sauer

This chapter was prepared primarily for "non power" engineers to introduce reactive power and voltage control concepts, and to identify several issues that remain as research challenges in this area. It begins with basic definitions and information on reactive power, and then focuses on problems that have been known for many years and have surfaced recently in power system operations. These pro...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه علامه طباطبایی 1390

abstract u.s. attack to afghanistan after 9/11 provided opportunities for us who tried to become the dominant power after collapse of ussr and bipolar world. thinkers like fukuyama believed american liberal democrats thought would be universally accepted without resistances. liberal democracy is the best and final model of governance; in this regard, united state has moral responsibilities for...

2015
S. Alwin Dr. M. Marsaline Beno

This paper deals with an indirect current controlled shunt active power filter (SAPF) for improving power quality by reactive power compensation and harmonic filtering. The presence of harmonics and reactive power in the power source because it will cause additional power losses and malfunctions. The proposed APF is based on a voltage source inverter (VSI). The VSI is controlled by two loops, t...

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...

This paper proposes the virtual flux based direct power control for Vienna rectifier. No need for the input voltage sensors, the current regulation loop and PWM voltage modulation block along with the active and reactive power decoupling are some of the salient advantages of this method that make it suitable for controlling the conventional active rectifiers. However, due to the three-level nat...

This paper presents an innovative active power filter design method to simultaneously compensate the current harmonics and reactive power of a nonlinear load. The power filter integrates a passive power filter which is a RL low-pass filter placed in series with the load, and an active power filter which comprises an RL in series with an IGBT based voltage source converter. The filter is assumed...

Journal: :Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications 2014

2015
Albana ILO Wolfgang GAWLIK Walter SCHAFFER Roland EICHLER

The central issue of this paper is the analysis of the reactive power behaviour in the presence of distributed generation and the outline of a method to control and dynamically optimize the reactive power flow. Results show that the local control of the decentralized reactive power produces an uncontrolled reactive power flow in the high voltage grid and changes the static behaviour of the load...

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