SIMULATION ,MODELING AND TRANSIENT STABILITY ANALYSIS OF GAS TURBINE POWER STATION KOTRI

M.E in (Electrical Power Engineering)Initial Seminar

BYSADDAM HUSSAIN ANSARI

Supervised by Prof.Dr.Ashfaque Ahmed Hashmani

Co-Supervised by Prof.Dr. Zubair Ahmed Memon

TABLE OF CONTENTS Introduction

Literature review

Problem Statement

Objectives

Research Methodology

References

INTRODUCTION:POWER SYSTEM STABILITY

Power System Stability: is a tendency of power system to develop restoring forces equal to or greater then disturbing forces in order to maintain overall equilibrium.

ORElectric power system ability, for known an original operating condition, to recover equilibrium state after going through physical disruption, by keeping mostly system preserved or intact .Steady state stability: ability of power system to remain in synchronism after small and slow disturbances. This stability is concerned with the determination of upper limit of machine’s loading before losing synchronism.Dynamic stability: ability of power system to maintain synchronism under continuous small disturbances i.e random fluctuations in loads and generation but this can be achieved by inclusion of automatic control devices such as AVR and different frequency control devices .

LITERATURE REVIEW:TRANSIENT STABILITY

Ability of power system to survive the transitions following a large disturbances and to reach an acceptable operating condition.It is the study which helps to find the behavior of synchronous generator during fault condition or disturbances.The disturbance in power system can be defined as variation in system parameters or quantities from their default/intial values .Transient stability analysis plays an important role for planning, designing, and upgrading electrical power system network. Due to increase in interconnection and expansion of grid ,power system is being pushed to operate nearer to the maximum limits ,so this thing put the system under very stressful situation and vulnerable to be subjected to the fault so for effective planning, operation and maximum control there is need of detailed transient stability analysis studies Prime objective of this study is to ascertain the system to normal value after clearing transient disturbance .

PROBLEM STATEMENT:WHAT HAPPENS TO SYSTEM IF SEVERE FAULT OCCUR??In transient state machine is affected by severe impacts mostly in short time following is the detailed example which states behavior of systemWhen any sort of severe disturbance occurs such as short circuit occurs on major equipment then protective relays will come into the action and will isolate that particular element resulting in series of following cascading problems will occur• variation of power transfers• changes in synchronous machine rotor speeds • variation in voltage at the buses

PROBLEM STATEMENT CONTINUEIt is observed system which is subjected to heavy load tends to be accelerate more in case of faults then the lightly loaded system, where as three phase line to line fault is most highly unstable fault

OBJECTIVESTo develop a simulation model of Gas Turbine Power Station Kotri A three phase fault will be located to, two different locations to

analyze the effect of fault location and Critical clearing time(maximum time duration that fault may occur in

power system without loss of stability) of system will be measured.Providing possible remedies/methods to reduce all those problems

occurring on the plant with the help of obtained MATLAB simulation results.

RESEARCH METHODOLOGY Literature survey. Data collection (i.e. ratings of different equipment's such as synchronous

generators, transformers and transmission lines installed at the plant) and gathering all the statistics related to transient stability problems currently or previously happened at the power plant.

Working on following MATLAB/SIMULINK toolboxes [14] Simpower system. Power System Analysis Toolbox. Power system block set.

IMPACT OF RESEARCH ON COUNTRY DEVELOPMENTPakistan is currently going through worst energy crisis i.e. severe load shading and very high unit rates of electricity. This is both slowing the pace of economic activity and causing public unrest with prolonged outages of electricity.

Black out of electricity cause huge economic loss and the main contributor of this thing is unstable power which is being feed by inter-connected grid system. Since gas turbine power station Kotri is currently producing 174 MW of power, and that is quite huge amount so this power plant should operate at very high stability.

Therefore during our detailed research work on it, we will try to dig out/analyses all the problems related to the transient stability and will suggest the possible remedies to minimize these at maximum level.

 

REFERENCES[1]. Prabha kundar,John paserba and Sylvain Viter. “Definition and classification of power system stability,” IEEE/ClGRE Joint Task Force on Stahilia Terms and Definitions [2]. KR.Padiyar. “Power system dynamics stability and control,” BS publications-2008.[3]. MA. Salam , Hj Morshidi and Nadia Ottman, “Transient stability analysis of Gadong power station” published in Institute technology brunei 2013.[4]. P.k Lyambo, and R. Tzonea ,Member IEEE “Transient Stability analysis of IEEE 14-BUS electrical power system” March 9,2007.[5]. Manoj Kumar Maharana and K.Shanti Swarup. “Identification of operating states of power system using transient stability analysis” IEEE-2008.[6]. P.Kundar. “Power system stability and control,” McGraw-Hill-1994.

REFERENCE CONTINUE[7]. Jignesh S patel, Manesh Sinha, “Power system transient stability using ETAP software, May 2011.[8]. Lu jinling, Yu lie,Zhu yongli, “Transient stability analysis of electrical power system by Pc-cluster system technique” ,IEEE-Paper 2006[9]. MA Slam et.al , “Identifying faults that would impact transient stability of multi-machine power system by using swing equations of synchronous machines”[10]. L. S Moulin et. al , “Pattern recognition technique to study the transient stability of large scale power system”.[11]. PR Sharma,Narendar Hooda, “Transient stability analysis of power system using MATLAB”, International Journal of Engineering Sciences & Research Technology Sciences & Research Technology,September 2012.[12]. Devender Kumar & Balwinder Singh Surjan, “Transient stability analysis using MATLAB and neural network” IJACTE Volume-2, Issue-2, 2013

REFERENCES CONTINUE• [13]. Nima Amjady ,Seyed Farough Majedi ,”Transient stability prediction by hybrid

intelligent system” IEEE TRANSACTIONS ON POWER SYSTEMS, VOL. 22, NO. 3, AUGUST 2007 • [14]. Santosh B.Kulkarni.”MATLAB/SIMULINK Simulation Tool for Power Systems,”

International journal of power system operation and energy management, 2011.