WITH EFFECT FROM THE ACADEMIC YEAR 2013- 2014
EE 473
POWER SYSTEM RELIABILITY
(Elective-III)
Instruction 4 Periods per week
Duration of University Examination 3 Hours
University Examination 75 Marks
Sessional 25 Marks
UNIT-I
Elements of Probability Theory - Probability Distributions: Random variables, density and distribution functions, Mathematical expectation-Mean and Variance, Binominal distribution, Poisson distribution, Normal distribution, Exponential distribution, Weibull distribution.
UNIT-II
Definition of Reliability: Component reliability, Hazard rate, derivation of the reliability function in terms of the hazarad rate. Causes of failures, types of failures. Bath tub curve, MTTR, MTBF. Reliability logic diagrams for series, parallel, series-parallel, non-series-parallel configurations. Minimal cut-set and decomposition methods
UNIT-III
Discrete Markov Chains: General modeling concepts, stochastic transitional probability matrix, time dependent probability evaluation and limiting state probability evaluation. Absorbing states. Continuous Markov Processes: Modeling concepts, State space diagrams, Stochastic Transitional Probability Matrix, Evaluating limiting state Probabilities. Reliability evaluation of repairable systems.
UNIT-IV
Generating System Reliability Analysis: Generation system model – capacity outage probability tables – Recursive relation for capacitive model building – sequential addition method – unit removal – Evaluation of loss of load and energy indices. Frequency and Duration methods – Evaluation of equivalent transitional rates of identical and non-identical units – Evaluation of cumulative probability and cumulative frequency of non-identical generating units – 2-level daily load representation - merging generation and load models
45 46
UNIT-V
Distribution System Reliability Analysis: Radial networks –Evaluation of Basic reliability indices, performance indices - load point and system reliability indices – customer oriented, loss and energy oriented indices. Parallel networks- inclusion of bus bar failures, scheduled maintenance – temporary and transient failures – weather effects – common mode failures –Evaluation of various indices.
Suggested Reading:
1. Roy Billinton and Ronald N Allan,"Reliability Evaluation of Engineering Systems”, Plenum Press.
2. Roy Billinton and Ronald N. Allan, Reliability Evaluation of Power Systems , Plenum Press, New York and London (Second Edition), 1996.
3. J. Endrenyi, John Wiley and Sons, Reliability Modeling in Electric Power Systems, 1978. (First Edition).