PROJECT GUIDE:G.SUBBAREDDY –M.TECH

BY:N.NARASIMHA RAO (Y07EE074)T.N. LAKSHMAN (Y07EE070)MOHAMMED RAZI (Y07EE066)P.NAVEEN KUMAR (Y07EE075)G.JAYADEV (Y06EE027)

• Today’s changing electric power systems create a growing need for

Reliability,flexibility, fast response and accuracy.• Flexible Alternating Current Transmission

Systems are new devices emanating from recent

innovative technologies that are capable of altering voltage phase angle and/or impedance at particular points in power systems

•THE MAIN CAUSE OF VOLTAGE STABILITY IS THE INABILITY OF POWER SYSTEM TO MEET THE DEMAND FOR REACTIVE POWER•VOLTAGE INSTABILITY IS THE CAUSE OF SYSTEM VOLTAGE COLLAPSE IN WHICH THE SYSTEM VOLTAGE TO ALEVEL FROM WHICH IT IS UNABLE TO RECOVER •VOLTAGE COLLAPSE MAY LEADS TO PARTIAL OR FULL POWER INTERRUPTION IN THE SYSTEM

•BY USING FACTS DEVICES WE CAN CONTROL THE VOLTAGE,IMPEDENCE AND PHASE ANGLE OF HIGH VOLTAGE AC TRANSMISSSION LINE•RESERVE REACTIVE SUPPORT MUST BE USED I,E SWICHTED SHUNT CAPACITORS AND SVC’S•FACTS STUDIES ON EASING VOLTAGE INSTABILITY PROBLEMS HAVE BEEN CONFINED TO APPLICATION OF STATIC VAR COMPENSATOR

•THYRISTOR CONTROL REACTOR•THYRISTOR SWITCHED CAPACITOR•STATIC VAR COMPENSATOR•THYRISTOR SWITCHED SERIES COMPENSATOR•STATIC COMPENSATOR•SELF COMMUTATED COMPENSATOR•UNIFIED POWER FLOW CONTROLLER

•INCREASE THE CAPABILITY OF LOADING OF LINES TO THEIR THERMAL CAPABILITES•INCREASE THE SYSTEM SECURITY THROUGHT RISING THEIR TRANSIENT STABILITY LIMIT•CONTROL OF POWER FLOW AS ORDERED•REDUCE REACTIVE POWER FLOW

•STATCOM IS A SELF COMMUTATED SWITCHING POWER CONVERTER SUPPLIED FROM AN ELETRIC ENERGY SOURCE AND OPERATEDTO PRODUCE A SET OF ADJUSTABLE MULTIPHASE VOLTAGE ,WHICH MAY BE COUPLED TO AC SYSTEM FOR PURPOSE OF EXCHANING ACTIVE AND REACTIVE POWER•STATIC: BASED ON SOLID STATE SWITCHING DEVICES•SYNSHRONOUS ANALOGOUS TO AN IDEAL SYNCHRONOUS GENERATOR WIEH 3 PHASE SINE WAVE AT FUNDAMENTAL FREQENCE•COMPENSATOR PROVIDED WITH REACTIVE POWER COMPENSATOR

•UNBALANCED LOADS•ARC FURNACES•INDUSTRIAL MILLS•WELDING OPERATIONS•WOOD CHIPPERS

•CONTINUOUS AND DYNAMIC VOLTAGE CONTROL•HIGH EFFICIENCY•HIGH DYNAMIC VERY FAST RESPONSE TIME•SINGLE PHASE CONTROL FOR UNBALANCED LOADS•REACTIVE POWER COMPENSATION

•BY•JUAN M.RAMIREZ ,MURILLO PEREZ,•NATIONAL POLYTECHNIC INSTITUTE ,MEXICO

•THIS PAPER IS AIM TO ANALYSIS OF VOLTAGE STABILITY MARGIN .IT INCLUDE STATCOM WITH THE OBJECTIVE OF ANALYSING ITS BEHAVIOR IN THE IMPROVEMENT OF VOLTAGE STABILITY

•BY•CARLOS A.C. CAVALIERE, MAURICIO AREDES,BRAZIL.

•THIS PAPER SHOWS THE STUDY OF THE STATCOM OPERATING IN UNBALANCED SYSTEMS WITH –VE SEQUENCE COMPONENTS.THIS DESCRIBES THE BASIC OPERATION OF STATCOM AND ITS CONTROL

•BY•SURESH KUMAR.K.S•DEPT OF EEE,NIT CALICUT•IN THIS PAPER THE BASIC PRINICIPLE OF OPERATION OF STATCOM AT DISTRIBUTION AND TRANSMISSION LEVELS IS PRESENTED AND VOLTAGE LEVEL IS IMPROVED AT DISTRIBUTION SIDE.

•In this paper, the basic structure of STATCOM operating under typical bus voltage control and its model are described. •which is used to control voltage in the system Simulations carried out confirmed that STATCOM could provide the fast acting voltage support necessary to prevent thepossibility of voltage reduction and voltage collapse at the bus to which it is connected.

•IN THIS SEMESTER::•WE STUDIED DIFFERENT TYPES FACTS DEVICES•NEXT SEMESTER::•SIMULATE THE STATCOM IN TRANSMISSION LINES WE SHOW THE PERFORMANCE OF STATCOM IN STABILITY OF VOLTAGE LEVEL IN T/L

THANK YOU