Course Details

1. Describe mathematically how the ‘A’ operator matrix is derived as well as the inverse matrix, and calculate the symmetrical phasors of the currents or voltages of an unbalanced system with the use of symmetrical components
2. Describe the various currents and voltages involved in Star connected load analysis.
3. Describe the various currents and voltages involved in Delta/Mesh connected load analysis.
4. Describe how the insertion of reactive power compensation devices leads to the improvement of the power factor in a system, evaluate the amount of Capacitance required for power factor correction under heavily inductive loading cases.
5. Explain how the per unit system analysis method is used to analyze a multy node multy voltage level system, and evaluate the per-unit and actual voltages and currents at the various system buses.
6. Describe the operation and evaluate the performance of medium transmission lines through ABCD parameter analysis.
7. Explain the function of circuit breakers and relays in the differential protection scheme, and evaluate the characteristics of current transformers.

Per unit Analysis: Parameter calculation for transformers, loads and transmission lines and mathematical identification of per unit voltage and current quantities at various points of a radial system.

Symmetrical components: theory for three phase system analysis, Development and application of the ‘A’ operator matrix and inverse matrix for system analysis. Calculation of the various current and voltage symmetrical components.

Delta and Star connected loads: Effect of load connection on the voltage and current calculations of the system, phasor diagrams and power for each connection.

Power factor correction: Calculation of the power factor of a loaded system, consisting of Resistors, inductors and capacitors. Precision improvement of the power factor through sizing the reactive compensation with the use of capacitor banks.

Transmission Line representation: Development of mathematical description of the ABCD parameters of medium transmission lines, calculation of Voltages , currents and power through two port network analysis.

Protection: Introduction of Protection Devices, CB, Relays, Operation of Fuses, protection of Line with the use of Differential scheme, calculation of CT ratio.

• Power system Analysis Second Edition, Hadi Saadat, McGraw-Hill, 2002

• Elements of power system analysis, William D, Stevenson Jr, 4th ed. Mc Graw-Hill, 2002
• Electrical technology, E. Hughes, Longman, 1995

Students are taught the course through lectures (3 hours per week) in classrooms or lectures theatres, by means of traditional tools or using computer demonstration.

Auditory exercises, where examples regarding matter represented at the lectures, are solved and further, questions related to particular open-ended topic issues are compiled by the students and answered, during the lecture or assigned as homework.

Topic notes are compiled by students, during the lecture which serve to cover the main issues under consideration. Students are also advised to use the subject’s textbook or reference books for further reading and practice in solving related exercises. Tutorial problems are also submitted as homework and these are solved during lectures or privately during lecturer’s office hours.

Students are prepared for final exam, by revision on the matter taught, problem solving and concept testing and are also trained to be able to deal with time constraints and revision timetable. The final assessment of the students is formative and is assured to comply with the subject’s expected learning outcomes and the quality of the course.