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Module

EEE8149 : Power Systems Operation & Analysis

  • Offered for Year: 2021/22
  • Module Leader(s): Dr Haris Patsios
  • Owning School: Engineering
  • Teaching Location: Newcastle City Campus
Semesters
Semester 2 Credit Value: 20
ECTS Credits: 10.0

Aims

To provide students with an advanced and systematic understanding of the operation of a modern electricity network, under both steady-state and fault conditions, and the techniques used for network analysis and design.

The course is designed to be of value to engineers whose task is the planning and operation of an electricity supply system.

Outline Of Syllabus

1. The Electricity supply system

Requirements of the electricity supply system. Generation, transmission and distribution. Distribution network configurations. Auxiliary systems.

2. AC power & reactive power

Power and reactive power. Complex power, voltamperes. Power factor.

3. Three-phase systems

Revision of three-phase systems, star and delta connections, line and phase variables. Single line representation of a balanced system.

4. Transmission lines and cables

Physical basis of the distributed parameter model, relationship between the physical layout and equivalent circuit parameters of transmission lines and underground cables. Line models (T and pi), short line model, selection of appropriate line model according to line length and load. Line real and reactive power calculations. Maximum line power. Power losses. Calculation of line sending end and receiving end voltages.

5. Power system calculations

The per-unit system, choice of base values. Fault level calculations. Simple load flow calculations.

6. Steady-state stability

Steady-state operation of synchronous machines. Phasor diagram representation of the synchronous generator connected to the infinite busbar. Power / load angle relationships. Steady-state stability limit. Transfer reactance.

7. Transient stability

Generator short circuit transients. Transient stability from the power/ load angle characteristic, the Equal Area Criterion, critical fault clearing angle, line switching, line faults.

8. Control of system voltage and frequency

Control of system frequency. Matching of supply and demand. Advantages of an interconnected system. Control of line voltage, VAr compensation.

9. Protection

Protection requirements for transmission and distribution networks. Components of a protection system. Types of protection relay. Principles of protection, unit protection schemes, non-unit protection schemes.

10. Unbalanced three-phase faults

Types of asymmetric faults. Symmetrical component representation of unbalanced sets of voltages and currents. Single line to earth faults. Line to line faults. Line to line to earth faults. Interconnection of sequence networks to model fault conditions with zero and finite fault impedance. Sequence impedances of generators, transformers and transmission lines. Effect of neutral point impedance on zero sequence networks.

11. Load flow studies

Nodal voltage analysis of circuits, nodal admittance matrix, nodal elimination for nodes with zero injected current. Formulation of the load flow problem. Constraints on power, reactive power and voltage at busbars. Newton-Raphson solutions for load flow. Alternative approaches to the load flow problem.

12. Dynamic stability

Generator dynamic equations, time stepping algorithms and generator swing curves.

Teaching Methods

Teaching Activities
Category Activity Number Length Student Hours Comment
Scheduled Learning And Teaching ActivitiesLecture361:0036:00Mix of synchronous, non-synchronous pre-recorded material, and PiP delivery
Guided Independent StudyAssessment preparation and completion12:002:00Final exam
Guided Independent StudyAssessment preparation and completion126:0072:00Reading specified articles
Guided Independent StudyAssessment preparation and completion115:0015:00Coursework
Guided Independent StudyAssessment preparation and completion360:3018:00Revision for final exam
Guided Independent StudyIndependent study157:0057:00Reviewing lecture notes; general reading
Total200:00
Teaching Rationale And Relationship

Knowledge and understanding of electricity networks and issues associated with their operation will be taught via formal lectures and self-guided study material. This will be supported by reflective learning using worked examples to develop critical awareness and evaluative skills.

Subject specific, cognitive and communication skills will also be developed during the formal lectures and self-guided material. Time management and IT skills will largely be developed through the self-guided material.

The coursework will provide additional opportunities for the student to develop their skills and understanding of the operation of a power system. Furthermore, the coursework will provide timely feedback prior to the examination assessment.

Assessment Methods

The format of resits will be determined by the Board of Examiners

Exams
Description Length Semester When Set Percentage Comment
Written Examination1202A100Written exercise
Exam Pairings
Module Code Module Title Semester Comment
EEE3014Power System Operation1N/A
Formative Assessments
Description Semester When Set Comment
Written exercise2MSummative assessment
Assessment Rationale And Relationship

The unseen written examination will provide students with the opportunity to demonstrate their knowledge and understanding of the key aspects of the operation of a modern electricity supply system.

The coursework will asses students' skills and understanding of the operation of a power system. Furthermore, the coursework will provide timely feedback prior to the examination assessment.

Subject specific, critical and evaluative skills will also be assessed through the written examination. The other key skills will not be assessed, but students will need to utilise these in order to access the self-guided material and prepare for the exam.

Reading Lists

Timetable