## POWER SYSTEMS ANALYSIS (CCE)

 SHE Level 4 SCQF Credit Points 20.00 ECTS Credit Points 10.00 Module Code MHH624681 Module Leader Martin MacDonald School School of Computing, Engineering and Built Environment Subject SCEBE - School Office Trimesters A (September start) B (January start)

### Summary of Content

Present day interconnected power system networks are characterized by their highly non-linear dynamical behavior. Stability analysis is carried out at almost all stages of the power system design, operation and control to assess the dynamic response of the system to various types of disturbances and interaction of controllers. This course is aimed at providing a basic understanding to different types of stability phenomena being observed in the power system networks including the analysis methods and the design of control measures required for the improvement of system stability.

### Syllabus

Power Systems Model : Representation, Single Line Diagram, per unit system, per unit impedance diagram, network model formulation, bus admittance matrix, formation of Y bus and Z bus using singular transformation, symmetrical components, sequence impedance and networks Power Flow Analysis : Radial and ring feeder load flow calculations, interconnected system load flow analysis, case studies , computer-aided analysis Fault Studies : Different types of faults in power systems, symmetrical fault analysis - selection of circuit breakers, use of reactors. Unsymmetrical faults - analysis of single line to ground, line to line and double line to ground faults in power system, analysis of unsymmetrical fault using Z bus. Stability Studies : Swing equations. Power-angle equations. Steady-state, dynamic and transient stability. Equal-area criterion of stability. Multi-machine stability studies. Methods for stability assessment. Factors affecting transient stability. Methods of improving transient stability. Voltage Stability. Power Systems Control : Frequency, voltage and power control, Load Frequency Control (LFC), Governors, Automatic Voltage Regulator (AVR), VAr generation, static Var compensators, tap-changes. Power Systems Economics:-3 Electric Utility rate structures, TOU rate, demand charges, load factor and real time pricing, Simple payback period and initial rate-of-return, Annualizing the investment, Cash-flow analysis. Interchange negotiations- short term ,long term, emergency and capacity, Inadvertent energy

### Learning Outcomes

On completion of this module the student should be able to:1. Model various power system components(AM1)2. Evaluate the performance of a power system under steady-state and fault conditions.(AM1,AM5,AM7)3. Analyse the stability of a power system. (AM1,AM5,AM7)4. Design control loops for active and reactive control of a power system in both isolated and interconnected systems. (AM1,AM3)5. Develop energy economics concepts and evaluate the Energy Accounting in an Interconnected Power System.(AM1)

### Teaching / Learning Strategy

The main teaching method will be based on lectures. The students will be expected to perform directed reading exercises and self-learning exercises on topics related to Power Systems Analysis. Tutorials will be used to reinforce the module material and to discuss the issues raised by the directed reading.

-360-3 1. HadiSaadat, "Power System Analysis", McGraw Hill, 2 nd Ed. 2. Syed A. Nasar, "Electric Power Systems", McGraw Hill, 4 th Ed, 2002 3. Daniel Kirschen and GoranStrbac, "Fundamentals of Power System Economics", Wiley, 2004.-3 4. Stephen J Chapman, " Electric Machinery and Power System Fundamentals", Mac-Graw Hill, 2001-3 5. D.P.Kothari and I.J.Nagrath, "Modern Power system Analysis", Tata Mac-Graw Hill, 3 rd Ed.-3

### Transferrable Skills

Tutorials provide:Problem Solving and Numeracy Reports provide:Communication/Literacy/Linguistic/Critical Evaluation

### Module Structure

Activity Total Hours
Independent Learning (FT) 100.00
Assessment (FT) 16.00
Tutorials (FT) 28.00
Lectures (FT) 56.00

### Assessment Methods

Component Duration Weighting Threshold Description
Exam (Exams Office) 3.00 50.00 45% Final Examination - unseen exam: 3 hours
Exam (School) 1.50 20.00 n/a Mid-term test - Unseen Test: 1 hour 30 minutes
Coursework 1 n/a 30.00 n/a Lab Report 2000 words