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Power Conversion

Code: PDEEC0064     Acronym: CP

Classification Keyword
OFICIAL Electrical and Computer Engineering

Instance: 2019/2020 - 1S

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

Cycles of Study/Courses

Acronym No. of Students Study Plan Curricular Years Credits UCN Credits ECTS Contact hours Total Time
PDEEC 2 Syllabus since 2015/16 1 - 7,5 70 202,5

Teaching Staff - Responsibilities

Teacher Responsibility
Adriano da Silva Carvalho

Teaching - Hours

Recitations: 3,00
Type Teacher Classes Hour
Recitations Totals 1 3,00
Adriano da Silva Carvalho 3,00

Teaching language



To analyse the operation of modern high performance power electronics converters in terms of different topologies, control methods. The objective is the student to get knowledge in applying the power converter as adapter of the power waveform independently from application domain gaining ability:

to adopt a topology for a well-established power/energy conversion;

to analyse power flow and input and output waveforms;

To control power converter operation.

Learning outcomes and competences

To analyse the operation of modern high performance power electronics converters.

To be capable of developing an appropriate converter and system model in order to satisfy particular analysis or synthesis requirements.

To evaluate trade-offs in designing of a power converter.

To be capable of designing and analysing the performance of power converter based control system.

To be capable of using simulation software for dynamics analysis.

To classify several dynamic phenomena that take place during normal and abnormal operating conditions and estimate their influence in the converter operation.

To analyse and design safe operation in power converter based control system.

Working method



Single and three-phase Pulse-Width Modulation (PWM) rectifiers. Modelling with instantaneous and average models. Model linearization. Design criteria for the AC inductance, the DC capacitor and the switching frequency. Main control requirements for active and reactive power control. Methods for grid synchronization: comparative analysis and design. Scalar control. Vector control. Sliding mode control. Direct power control. Sensorless control methods. Fuzzy, neural network and computational intelligence based control methods.

Multilevel converters. Analysis of the neutral-point clamped, nested-cell topologies, and cascaded H-bridges. Control methods for multilevel converters: sinusoidal PWM and space-vector methods. Closed-loop control. Comparative analysis between multilevel converters and conventional converters. Application of multilevel converters in railway traction and high power drives.

Active power filters: voltage and current source structures. Single and three phase topologies. Four wire active power filtering. Control strategies for active power filters: voltage control, reactive power compensation and harmonics cancellation. Control methods for active power filters: scalar and vector control methods, pq theory.

Circuit layout guidelines for power converters. EMI generated by power electronics converters: mitigation methods.

Thermal modelling of semiconductors and converters.

High performance and dynamics analysis by simulation of power electronics converters based systems using MatLab, ANSYS/Simplorer and PSIM software packages.

Mandatory literature

M. Kazmierkowski, R. Krishnan, F. Blaabjerg; Control Problems in Power Electronics, Academic Press, 2002
B. Wu; High Power Converters and AC Drives, Wiley-IEEE Press, 2006
H. Akagi, E. Watanabe, M. Aredes; Instantaneous Power Theory and Applications to Power Conditioning, Wiley-IEEE Press, 2007

Teaching methods and learning activities

Classes will include lectures, labs (using simulation software) and oral presentations from students reporting conclusions from their oriented study and research in specific domains.




Technological sciences > Engineering > Electronic engineering

Evaluation Type

Distributed evaluation with final exam

Assessment Components

Designation Weight (%)
Exame 40,00
Participação presencial 20,00
Trabalho de campo 40,00
Total: 100,00

Amount of time allocated to each course unit

Designation Time (hours)
Estudo autónomo 80,00
Frequência das aulas 43,00
Trabalho de campo 80,00
Total: 203,00

Eligibility for exams

Admission to exam is ruled by: 1. Attendance to lectures according to legal rule; 2. To have concluded 3 of the assignments

Calculation formula of final grade

The components for student evaluation are:

- Assignments

- Projects

- Exam

Each component will receive a grading in percentage.

The final score will be calculated according to the following rule: 0.2 * Assignments + 0.4 * Projects +0.4 * Exam

A Passing grade corresponds to a minimum of 2/3 of the maximum score.

Examinations or Special Assignments

Project 1: modelling and simulation of a high power single-phase PWM rectifier with bidirectional power transfer for traction applications Project 2: modelling and simulation of a three-phase PWM rectifier connected to the grid Project 3: modelling and simulation of a three-phase multilevel inverter for electrical drives Project 4: modelling and simulation of a three-phase active power filter for harmonics compensation and power factor correction Project 5: modelling and simulation of a FACTS controller

Special assessment (TE, DA, ...)

Special evaluation is done for the 5 assignments.

Classification improvement

Only the exam grade can be improved.

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