This course presents analysis and control methods of power electronics circuits converting and controlling of electric power by using semiconductor switching power devices. It deals with switching transitions in MOSFETs and IGBTs, commutation in voltage-source bridge converters, voltage and current feedback control, applications to grid-connected converters, various grid-connection converters and related emerging technologies.
Analysis of power electronics circuit requires consideration of transient response in a very wide range of time scale from a utility grid period of 20 milli seconds to a switching transition of several hundred nano seconds. Although recent computers have a high calculation performance, a lot of computation would be required to analyze the dynamic response in a long duration with a quire small time step. This course introduces some analysis and modeling methods to solve the dynamic response of the power electronics converters effectively. These methods are also valuable for controlling these converters. Student are expected to study these fundamental methods as well as their applications to various other practical problems.
By the end of the course, students will be able to:
1) Understand the circuit topology and operating principles in basic power electronics circuits.
2) Analyze and control basic power electronics circuits.
3) Understand the control strategy for grid connection converters.
4) Design the main circuit and the controller in a simple grid connection converter.
Power electronics, converter topologies, current and voltage control methods, and grid connection converters.
|✔ Specialist skills||Intercultural skills||Communication skills||Critical thinking skills||✔ Practical and/or problem-solving skills|
The instructor will first present some circuit topologies, control schemes, and/or analysis methods. Students will have discussions the assigned topics in the class.
|Course schedule||Required learning|
|Class 1||Modeling of voltage-source converters: state average method, various modeling methods, switching function and duty ratio, control response||Analysis of coupling between an ac inductor and a dc capacitor|
|Class 2||Digital current control: micro processer and micro controller, signal sampling and reference update, digital current feedback control and z-transform||Analysis of the transient response of a digital current feedback control method|
|Class 3||Grid-connection converters: rectifiers, dc power transmission converters, performance of dc voltage control||Discussion on the transient response of the dc-voltage and ac-current control|
|Class 4||Current control methods for grid connection: active and passive impedance, feedforward compensation, synchronous reference frame, and decoupling control||Discussion of current control methods and applications|
|Class 5||Harmonic compensators: circuit configurations, harmonic detection methods, control methods, and compensation methods, and hybrid harmonic-compensation systems||Harmonic compensators|
|Class 6||Power and energy variations and disturbances in grid connection converters: reactive power, harmonics components, negative sequence currents, and flicker components||Power flow in power conversion circuits|
|Class 7||Control and analysis of stored energy Energy strage in power converters, DCcapacitor voltage control, transient response||Control and analysis based on stored energy|
To enhance effective learning, students are encouraged to spend approximately 100 minutes preparing for class and another 100 minutes reviewing class content afterwards (including assignments) for each class.
They should do so by referring to textbooks and other course material.
Lecture slides will be delivered through T2SCHOLA.
1) John G. Kassakian, Martin F. Schlecht, George C. Verghese, Principles of Power Electronics, Addison-Wesley Series in Electrical Engineering, ISBN-13: 978-0201096897
2) Ned Mohan, Tore M. Undeland and William P. Robbins, Power Electronics: Converters, Applications, and Design, ISBN-13: 978-0471226932
Grading depends on the reports.
This course is based on the knowledge taught by the undergraduate "power electronics" course.
Hideaki Fujita, fujita[at]ee.e.titech.ac.jp
Please make appointment through email.