ET8304 - Power Theories and Compensation with Power Electronics
Lessons are not given in the academic year 2018/2019
Course objective: Pervasive proliferation of non-linear and time-varying loads and distributed generation make the power system operate under conditions that are substantially different from traditional sinusoidal ones. This calls for advanced compensation equipment and coordinate operation to improve power quality and efficient use of resources. Power electronics is the best candidate solution, provided that the use of any device is based on a proper understanding of the complexity of the new scenario. The aim of the course is to provide a theoretical background to correctly approach the problem of reactive, harmonic and unbalance compensation, in the context of the power theory debate still open today.
Syllabus: -Introduction -Historical review of the main power theories for electric networks operating under non-ideal conditions.-Presentation of the updated discussion in the scientific community. -Correct definition of the compensation problem. Evaluation of distributed/centralized and average/instantaneous compensation. -Characteristics, potential and limitations of different types of compensation systems: passive/active, fixed/regulated series/shunt compensations. -General capabilities of voltage source converters for instantaneous compensation. -Discussion of the following reactive power compensating devices: *Static Var Compensator(SVC): Principle of operation, configuration and control capabilities *Static Compensator(STATCOM): Principle of operation, configuration and control capabilities.
After completing the course, the student shall have:
- a solid theoretical understanding of the main power theories, and to be able to identify the differences between the theories discussed in the scientific community.
- an understanding of the need for compensation in the context of power quality and stability of the modern power network.
- a solid knowledge of the compensation capabilities and limitations of the following compensation technologies: passive elements (C, L), line commutated compensators (SVC) and actively controlled compensators (VSC, Active Filters)
After completing the course, the student shall be able to:
- decide the proper compensation technology or combination of technologies for a given network condition and to implement it by simulation and/or experimental trials.
- design and implement control algorithms for compensation systems aimed at reactive, harmonic and unbalance compensation in the electric network.
- write a scientific paper on a particular case study related to compensation of non-idealities in electric networks.
After completing the course, the student shall have acquired:
- an overview of the historical development of power theories with respect to the technical development and state of advancement of electric power systems
- basic understanding and critical thinking on the theoretical debate on power theories that is ongoing in the scientific community.
- a comprehensive overview of power electronic systems and corresponding configurations that can be utilized for power quality improvement in electric power systems.
Learning methods and activities
The course will be based on introductory lectures to most relevant power theories and presentation of compensation systems, followed by discussion of selected papers by each participant of the course. The dynamics will be the following: a number of lectures will be reserved for colloquia and presentations by the PhD candidates. For that, a list of selected papers will be given at the beginning for each student to present during one lecture and to be discussed openly by each participant. The student will have assigned relevant material and will have to prepare the presentation/discussion of that paper according to a calendar that will be provided at the beginning of the course. The exam will consist of the preparation of a scientific paper in IEEE format which should reflect the knowledge acquired during the course and where such knowledge will be implemented by the student using as platform for the discussion his/her PhD research topic. The course is given every second year, next time spring 2020.
Recommended previous knowledge
TTK4105 Control Engineering, TET4110 Electrical Machines or equivalent courses.
Required previous knowledge
TET4190 Power Electronics, TET4120 Electical Motor Drives, TET4180 Electric Power System Stability or equivalent courses.
A selection of IEEE papers and other journal articles will be used as reference for discussions and fundamental definitions.
The two following books will be also used, when relevant: - "The instantaneous Power Theory and Applications to Power Conditioning" by Akagi, Hirofumi / Watanabe, Edson Hirokazu / Aredes, Mauricio, - "Understanding FACTS," N G Hingorani and L Gyugyi, IEEE Press, 2000
- * The location (room) for a written examination is published 3 days before examination date.