Systems Dynamics and Stability

Code:

EEC0115

Acronym:

DESI

Keywords
Classification	Keyword
OFICIAL	Power

Instance: 2018/2019 - 1S

Active?	Yes
Responsible unit:	Department of Electrical and Computer Engineering
Course/CS Responsible:	Master in Electrical and Computers Engineering

Cycles of Study/Courses

Acronym	No. of Students	Study Plan	Curricular Years	Credits UCN	Credits ECTS	Contact hours	Total Time
MIEEC	6	Syllabus	5	-	6	56	162

Teaching language

Suitable for English-speaking students

Objectives

1- BACKGROUND

Security assessment is a crucial task to obtain an efficient planning and operation of power systems. Therefore, having the skills to perform this task is of major importance for power system engineers.

2- SPECIFIC AIMS

Be able to understand and model the time domain behavior (i.e., dynamic behavior) of power systems. Understand the different dynamic phenomena that can appear in a power system, resulting from disturbances, which may lead to loss of system security. Be familiarized with the tools and methodologies that can be used to study and solve these problems.

Learning outcomes and competences

- Understand the different dynamic phenomena that can appear in a power system, resulting from disturbances, which may lead to loss of system security. 

- Be able to master the modeling of synchronous generators, loads, excitation systems, automatic voltage regulators (AVR), prime movers (hydraulic turbines, thermal units) and frequency regulation systems, for dynamic analysis studies. 

- Be capable of using dynamic simulation software for the purpose of developing transient and dynamic analysis of power systems. 

- Understand the operation of primary, secondary and tertiary load-frequency control systems in interconnected power systems. 

- Identify the nature of power system oscillations and characterize such oscillations using modal analysis. 

- Be familiar with power system stabilizers and the procedures for tuning these controllers to increase the damping of electromechanical modes of oscillation  

- Be aware of the methodology required to apply automatic learning techniques in order to obtain on-line dynamic security assessment tools in power systems.

Working method

Presencial

Pre-requirements (prior knowledge) and co-requirements (common knowledge)

Basic courses about operation and analysis of power systems. 

Program

1) POWER SYSTEM DYNAMIC SECURITY ASSESSMENT - Understand: Why and when dynamic security assessment is performed in power systems; The different types of dynamic problems that can appear in power systems, namely, with an high renewable power production; The tools and methodologies that can be used to study and solve these problems.

 

2) POWER SYSTEM DYNAMIC MODEL - Detailed modeling of synchronous generators, loads, excitation systems and automatic voltage regulators (AVR), prime movers (hydraulic turbines, thermal units) and frequency regulation systems, for dynamic analysis studies. Modeling Automatic Generation Control system and performance analysis in power systems with several control areas.

 

3) LOAD-FREQUENCY CONTROL SYSTEM - Description of the dynamic behavior and management of primary, secondary and tertiary load-frequency control systems in large interconnected power systems.

 

4) SMALL-SIGNAL STABILITY IN POWER SYSTEMS - Analysis of power system oscillations due to the lack of damping torque at the generators rotors. Study of these phenomena, using linearized models of the power system around an operating point and eigenvalue-based methods (modal analysis). Review of the concepts of eigenvalue analysis of linear systems, addressing the linearization of the state equations, the construction of the linear model in the canonic state space form and the physical meaning of eigenvalues, eigenvectors, participation factors, residues and controllability and observability factors. Design of power system damping controllers, tackling with the configuration of power system stabilizers (PSS) and the procedures for tuning these PSS.

 

5) AUTOMATIC LEARNING TECHNIQUES FOR DYNAMIC SECURITY ASSESSMENT - Application of automatic learning techniques in order to provide real-time dynamic security assessment of power systems. The specific situations of isolated and interconnected power systems, with high penetration of wind power production, will be analyzed.

Mandatory literature

Kundur, Prabha; Power system stability and control. ISBN: 0-07-035958-X

Teaching methods and learning activities

Theoretical classes are based on oral presentation, supported by a board and data show. Theoretical-practical classes take place in the computer laboratory. In these classes, students must do an assignment, supported by the teacher supervision. The assignment aims the dynamic analysis of a fictitious power system, with typical characteristics, by using a dynamic simulation software tool provided by the teacher.

Evaluation Type

Distributed evaluation with final exam

Assessment Components

Designation	Weight (%)
Exame	60,00
Trabalho escrito	40,00
Total:	100,00

Amount of time allocated to each course unit

Designation	Time (hours)
Elaboração de projeto	27,00
Elaboração de relatório/dissertação/tese	27,00
Estudo autónomo	56,00
Frequência das aulas	52,00
Total:	162,00

Eligibility for exams

Not exceed the maximum allowed number of absences to classes, having a minimum grade of 40% in this assignment; having a minimum grade of 40% in this exam.

Calculation formula of final grade

0.6*Exam + 0.4*Assignment

Examinations or Special Assignments

ASssignment aiming the dynamic analysis of a fictitious power system, with typical characteristics, by using a dynamic simulation software tool provided by the teacher.

Special assessment (TE, DA, ...)

Students with a special status have also to do the assignment and to deliver it at the same time as for ordinary students. The assignment is the same for all students.

Classification improvement

Only possible for the final exam.

Observations

This course requires the student to be aware of knowledge’s presented in the following course: Regimes Estacionários do SEE (EEC0105). It is the student's responsibility to ensure mastery of the topics covered in this course.