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# EI1230 Electric Power Engineering I 8.0 credits

This course is an introduction to Electric Power Engineering, with a base of important theoretical concepts and a practical background about electrical energy systems from generation to consumption.

### Choose semester and course offering

Choose semester and course offering to see current information and more about the course, such as course syllabus, study period, and application information.

Headings with content from the Course syllabus EI1230 (Autumn 2022–) are denoted with an asterisk ( )

## Content and learning outcomes

### Course contents

- Power in alternating current circuits: RMS value, active power, reactive power, power factor, reactive compensation.

- Voltage drop, power transmission between voltage sources, short-circuit power.

- Three-phase system: principles and advantages, connections Y and D, formulas for balanced operation, single-phase diagrams, calculation for unbalanced case.

- The transformer. principle, formulas for ideal transformer; analysis by referred quantities equivalent circuit with magnetisation and losses; percentage impedance; the autotransformer; three-phase connection types

- Electric machines: calculations on the synchronous machine in operation as motor or generator; the principle and simple calculations on asynchronous and dc machines.

- Power electronics: diodes, thyristors and transistors; common applications for rectification and control; more about RMS value, mean and harmonics.

- The design of the power grid from low-voltage systems to the transmission network.

- Safety and protection: regulatory frameworks, dangers with electricity, protection against overcurrents and earth faults at different system levels.

### Intended learning outcomes

After passing the course, the student should be able to

- calculate current, voltage and AC power in single-phase systems, and in balanced and unbalanced three-phase systems. Also more complicated calculations in three-phase system should be able to be solved by programming with complex numbers.

- describe equivalent circuits for operation of the transformer, the synchronous machine and the induction machine and use these in calculations of for example power, voltage drop and losses

- describe the operation of simple power electronic circuits such as phase control and rectification, and calculate the RMS value and mean for waveforms that arise in such circuits

- Describe at a general level for the design of the power grid including different voltage levels with their typical network topologies and methods for protection in fault situations, and examples of how renewable sources and sustainability requirements influence the power grid

- describe at the basic level the dangers that electricity can cause, methods that can protect against these faults and the regulatory framework for electricity safety in Sweden.

### Course disposition

No information inserted

## Literature and preparations

### Specific prerequisites

Knowledge in linear algebra and analysis, 10.0 higher education credits, equivalent to completed course HF1006.

Knowledge in electromagnetism, 7.0 higher education credits, equivalent to completed course HE1027.

Active participation in a course offering where the final examination is not yet reported in LADOK is considered equivalent to completion of the course.

Registering for a course is counted as active participation.

The term 'final examination' encompasses both the regular examination and the first re-examination.

### Recommended prerequisites

No information inserted

### Equipment

No information inserted

### Literature

No information inserted

## Examination and completion

If the course is discontinued, students may request to be examined during the following two academic years.

### Grading scale

A, B, C, D, E, FX, F

### Examination

• LAB1 - Laboratory tasks, 2.0 credits, grading scale: P, F
• PRO1 - Project work, 2.0 credits, grading scale: P, F
• TEN1 - Written exam, 4.0 credits, grading scale: A, B, C, D, E, FX, F

Based on recommendation from KTH’s coordinator for disabilities, the examiner will decide how to adapt an examination for students with documented disability.

The examiner may apply another examination format when re-examining individual students.

### Opportunity to complete the requirements via supplementary examination

No information inserted

### Opportunity to raise an approved grade via renewed examination

No information inserted

### Ethical approach

• All members of a group are responsible for the group's work.
• In any assessment, every student shall honestly disclose any help received and sources used.
• In an oral assessment, every student shall be able to present and answer questions about the entire assignment and solution.

## Further information

### Course web

Further information about the course can be found on the Course web at the link below. Information on the Course web will later be moved to this site.

Course web EI1230

Technology

First cycle

### Add-on studies

No information inserted

### Supplementary information

In this course, the EECS code of honor applies, see:
http://www.kth.se/en/eecs/utbildning/hederskodex