Power systems analysis
Summary
The course provides the fundamental concepts to model power systems, understand their operation and design/coordinate some of its main components.
Content
1. Introduction to power systems
- Structure of power systems
- Classification as a function of the rated voltage
2. Recall of fundamental principles for the analysis of AC circuits and systems
- Recall of fundamentals aspects for the study of AC circuits: phasors, instantaneous powers, AC powers
- Recall of fundamentals aspects for the study of AC three phase circuits
- Study of unsymmetrical three phase circuits: the symmetrical component analysis
3. Elements of transmission lines for the transportation of electricity
- Derivation of transmission lines equations from electromagnetic field theory
- Transmission lines modeling
- Expressions of electrical power flows in AC transmission lines
- Numerical simulation of transmission lines
- Heat balance of overhead transmission lines and cables
- Thermal behaviour in case of overloading and short circuit
- Design principles of transmission lines and cables
4. Fundamentals of electrical machines
- Magnetic circuits and operation of transformers
- Transformers equivalent circuits and parameters derivation
- Rotating synchronous machines: operation and equivalent circuit
5. The power flow problem
- From the physical network to the admittance matrix (nodal analysis in steady state conditions)
- Formulation of the power flow problem in cartesian and polar coordinates
- Numerical solution of the power flow problem
- Applications of the power flow to analyse the behaviour of power systems
6. Short circuit analysis and protections
- Electromagnetic transients associated to short circuits
- Breakers characteristics and their selection
- Computation of symmetrical and unsymmetrical short circuit currents using the symemtrical components analysis
- Protections against short circuits and relays coordination
- Short circuit behaviour of systems with grounded/ungroudned neutral
- Protections of systems with grounded/ungroudned neutral
7. Frequency regulation in power systems
- Power balance and frequency in power systems
- Primary frequency control
- Secondary frequency control
- Dynamic simulation of power systems
Keywords
Power systems, transmission lines, power flow analysis, symmetrical components analysis, admittance matrix calculus, short circuit analysis, protections and relaying, power systems dynamics, frequency control.
Learning Prerequisites
Required courses
Electrical circuits and systems, fundamental of signal processing.
Learning Outcomes
By the end of the course, the student must be able to:
- Assess / Evaluate the behavior of power systems
- Design parts of power systems and/or sub-systems
- Develop models of power systems in steady state
- Develop models of power systems in transient conditions
- Analyze the static and dynamic behavior of power systems
- Produce models of power systems
- Justify power systems design choices
Teaching methods
Ex cattedra lectures, numnerical excercices and simulations on dedicated software.
Expected student activities
Students are expected to attend lectures, participate in exercise sessions (which include numerical exercises and simulations using dedicated software), and complete tests throughout the semester.
Assessment methods
The course grade is based on tests conducted during the semester and a final exam.
Prerequisite for
EE-472 Smart grids technologies
In the programs
- Semester: Fall
- Exam form: During the semester (winter session)
- Subject examined: Power systems analysis
- Lecture: 3 Hour(s) per week x 14 weeks
- Exercises: 2 Hour(s) per week x 14 weeks
- Type: optional
- Semester: Fall
- Exam form: During the semester (winter session)
- Subject examined: Power systems analysis
- Lecture: 3 Hour(s) per week x 14 weeks
- Exercises: 2 Hour(s) per week x 14 weeks
- Type: optional
- Semester: Fall
- Exam form: During the semester (winter session)
- Subject examined: Power systems analysis
- Lecture: 3 Hour(s) per week x 14 weeks
- Exercises: 2 Hour(s) per week x 14 weeks
- Type: optional