facts final

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  A

SEMINAR

ON  “FLEXIBLE AC TRANSMISSION SYSTEM”

Submitted By:-

PIYUSH KUMARRoll No-

07ESBEE204

Guided By:-

Mr. Rahul Sharma

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INTRODUCTION

Today due to increasing demand of electric

 power, the existing transmission nw in the

de!eloped country are found to "e wea#

which results in the poor $uality ofunrelia"le supply%so in order to expand or

enhance the power transfer capa"ility of

 N& a new programme is de!elopedwhich

is #nown as 'A(TS%

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FLEXIBLE AC TRANSMISSION

SYSTEM

  A power electronic

based system and other

static equipment thatprovide control of one or

more AC transmission

system parameters to

enhance controllability

and increase power

transfer capability.

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Role of Power ElectronicsRole of Power Electronics

The power electronics

interface facilitates

the transfer of power

from the source to the

load by converting

voltages and currents

from one form toanother .

~ LConverter  ource !utput to Load

- Ad"ustable #C- inusoidal AC

- $i%h-frequency ACController 

&ower 'lectronics

(nterface

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)Impro!ed power transmission capa"ility%

)Impro!ed system sta"ility%

)Impro!ed power $uality%

)Minimal en!ironmental impact%

)Minimi)ed transmission losses%

 Benefits of facts

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*he two main reasons for incorporatin%+AC* devices in electric power systems are:

,aisin% dynamic stability limits.

&rovide better power flow control.

 Reasons for operating the FACTS

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hen we discuss the creationmovement and utili/ation of electrical

power it can be separated into three

areas :-

  0.Generation

1.*ransmission

2.#istribution

Power System Control

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  Controllability of &ower ystem

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e 3now that

*hree main variables that can be directly

controlled in the power system to impact itsperformance. *hese are :

a. 4olta%e

b. An%lec. (mpedance

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Example of Conventional Equipment or

Enhancing !ower System Control

eries Capacitor 

  -Controls (mpedance

witched hunt-Capacitor and ,eactor 

  -Controls 4olta%e

&hase hiftin% *ransformer 

  -Controls An%le

ynchronous Condenser 

  -Controls 4olta%e

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Example of "CTS Controllers or Enhancing

!ower System Control

tatic ynchronous Compensator5*A*C!67  -Controls 4olta%e

tatic 4ar Compensator54C7

  -Controls volta%e

8nified &ower +low Controller58&+C7tatic ynchronous eries Controller5C7

  -Controls 4olta%e(mpedancean%le

*hyristor Controlled tatic Compensator5*CC7

  -Controls (mpedance

 *hyristor Controlled &hase hiftin% *ransformer5*C&*7

  -Controls An%le

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#ifference between Mechanical $rea%er action and

Thyristor Switch action

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&verview &f "CTS Controller Circuits

0.tatic 4ar Compensator54C7

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*he first commercial 4C was installed

in 091.

!n transmission level it is used in

099.

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1.tatic ynchronous Compensator5*A*C!67

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2.*hyristor Controlled eries Compensator5*CC7

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(t increases dampin% when lar%eelectrical system are interconnected.

*he first *CC was commissionedin 099;.

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<.8nified &ower +low Controller58&+C7

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=.tatic ynchronous eries Compensator5sssc7

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teady state 4olta%e re%ulation and

control

 teady state control of power flow ona

transmission line

*ransient stability enhancement#ampin% at transmission system

oscillation frequencies 5>.1 ? 1 $/7.

Conclusion 

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