CONTROL AND ANALYSIS OF A UNIFIED POWER FLOW CONTROLLER

PRESENTED BY:
A.AMITHA
A.GAYATHRI
P.B.KALYANI
G.BHARATHA LAXMI

¢ AIM:
THE MAIN AIM OF OUR PROJECT IS TO
INCREASE THE POWER CONTROL OR VOLTAGE
CONTROL IN A TRANSMISSION LINE USING
UPFC(UNIFIED POWER FLOW CONTROLLER).


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Unified Power Flow Controller

INTRODUCTION

Two main objectives of FACTS

Increase the TX capability of AC line
Control of power flow over the TX routes

UPFCs - most effective FACTS device

UPFC “ a device which control TX line impedance, voltage and phase angle



BASIC CONSTRUCTION OF A UPFC

Consists of two switching GTO converters
Shunt-connected
Series-connected

Both converters can operate in a rectifier mode or in an inverter mode

A DC branch links these two converters ....etc

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Solutions to Practical Unit Commitment Problems with Operational, Power Flow and Environmental Constraints
Presented By:
I. Jacob Raglend and Narayana Prasad Padhy1


Abstract”
In this paper, an algorithm to solve environmental constrained unit commitment problem (UCP) with operational and power flow constraints has been developed to plan an economic and secure generation schedule. Both Economic load dispatch (ELD) and Economic emission dispatch (EED) have been applied to obtai ....etc

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Incorporation of FACTS Controllers in Newton Raphson Load Flow for Power Flow Operation, Control and Planning: A Comprehensive Survey
Abstract-
This paper presents a comprehensive survey ofincorporation of FACTS controller such as SVC, TCSC,SSSC, STATCOM, UPFC, and IPFC devices in Newton-Raphson load flow (NRFL) for power flow control. Thepurpose of this paper is to present a comprehensive surveyof various FACTS controllers are incorporated in loadflow analysis for different point of view such as optimalpower flow control, planning an ....etc

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ABSTRACT
In recent years, digital computer is becoming most appropriate tool to solve any engineering problem. In last two decades number of programs have been developed for computers in solving power system problems. Many of these programs deal with system load flow, short circuit currents, stability, and for control of power systems. The higher percentage of proper utility of computers in distribution systems saves engineering time and investment.
All the time the distribution engineer encounters th ....etc

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D. Menniti, A. Pinnarelli
Electronic, Computer and System Science Department

U. De Martinis, A. Andreotti
Electric Engineering Department


Abstract –
Flexible AC Transmission Systems (FACTS) use power electronic components to enhance controllability and capability of electrical power system. FACTS devices are able of opportunely modify voltage, phase angle and/or impedance and then the power flows at particular points in power systems . One of the more intriguing and potentia ....etc

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Usefulness of DC Power Flow for Active Power Flow Analysis



I. INTRODUCTION
STATIC power system analysis has always been
performed using full power flow. It is one of the
fundamental tools for power system analysis and is used in
the operational as well as planning stages. Vertically
integrated companies have used it to control their systems, as
well as to plan the optimal economic operation of generation
resources, either by means of optimal power flo ....etc

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Methods for Reduction of Voltage Unbalance in Weak Grids Connected to Wind Plants



1 INTRODUCTION
The location of wind turbines is based on wind properties. Normally, areas with good wind resources are geographical remote. The cost of the electrical power grid connecting the wind plants should be as low as possible. The voltage quality in a weak power grid may be poor, and unbalanced voltages can occur. Induction machines are attractive as wind turbine gener ....etc

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Abstract
A method for estimating the phase current unbalancein a multiphase buck converter is presented. The method uses theinformation contained in the voltage drop at the input capacitor’seffective series resistance (ESR) to estimate the average current ineach phase. Although the absolute estimation of the currents dependson the value of the ESR and is therefore not absolutely accurate,the relative estimates of the currents with respect to one otherare shown to be very accurate. The method can be implementedwith a low-rate down-sam ....etc

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