DEE-34206 Dynamics and Control of Grid-Connected Converters, 5 cr
Additional information
During academic year 2017-2018 the course is held in the first period. During the following years the course is held in the second period.
Suitable for postgraduate studies.
Person responsible
Tuomas Messo, Jenni Rekola, Teuvo Suntio
Lessons
| Implementation | Period | Person responsible | Requirements |
| DEE-34206 2017-01 | 1 |
Tuomas Messo Jenni Rekola Teuvo Suntio |
The course is graded based on PC exam, written exam and laboratory work assignment. Specific information on the grading system will be given on the first lecture. |
Learning Outcomes
The course gives basic knowledge on dynamic modeling of three-phase grid-connected converters in such a way that the student knows basic terminology, control principles, as well as can perform simple control design based on loop-shaping design principles. The student understands the principle of power-hardware-in-the-loop simulations and can test stability of self-tuned controllers in the laboratory. The student understands the basic constraints related to control of grid-connected converters, such as control delay, dynamical anomalities (RHP-poles), AC filter resonance, unbalanced grid voltages and impedance-based interactions. The student becomes aware of different current control and grid synchronization methods. After taking the course the student has the ability to model three-phase converters and knows how the dynamic model can be utilized to yield stable converter in terms of small-signal stability.
Content
| Content | Core content | Complementary knowledge | Specialist knowledge |
| 1. | Modeling of three-phase circuits in stationary and synchronous reference frames | Instantaneous power theory | Analysing three-phase systems using positive and negative sequence components |
| 2. | Developing average models of three-phase converters in the synchronous reference frame | Developing the linearized model and open-loop transfer functions | Developing average models of converters with high-order AC filters |
| 3. | Constructing and solving closed-loop transfer functions | Design of cascaded control loops | Analysing the effect of different control functions to converter AC-side impedance |
| 4. | Application of the dynamic models to control design | The effect of control delay | Sizing damping resistors and implementing active damping |
| 5. | Applying the loop-shaping technique | Understanding real-life limitations of control bandwidth | Adaptive tuning |
Instructions for students on how to achieve the learning outcomes
The student attends to every lecture and actively participates in discussion and any group works assigned during lectures. The student spends time familiarizing with any given study material, succeeds in all of the given homework assignments and laboratory work and takes advantage of advising sessions held in the PC classroom. Students are encouraged to work mainly in small groups of two to three. Co-operation between groups is allowed and encouraged.
Assessment scale:
Numerical evaluation scale (0-5)
Partial passing:
Study material
| Type | Name | Author | ISBN | URL | Additional information | Examination material |
| Book | TS ja TM | in press | No |
Prerequisites
| Course | Mandatory/Advisable | Description |
| DEE-34107 Modeling and Analysis in Power Electronics | Mandatory | 1 |
| DEE-33116 Power Electronics Converters | Mandatory |
1 . DEE-34106
Additional information about prerequisites
Before taking this course the student should be familiar with the following: Basic operational principle, toplogogies and modulation methods of DC-DC and DC-AC converters. Dynamic modeling and frequency-domain analysis related to DC-DC converters. Basic principles of control theory and control design of dynamic systems.
Correspondence of content
There is no equivalence with any other courses