### Transmission and Distribution of Electric Power

#### Course Description

#### General Competencies

Mechanical calculations on overhead lines. Calculation of electric parameters from the electric tower geometry. Calculation of a steady state in power line operation. Determination of voltage drops and active and reactive power losses. Cable selection and dimensioning. Applications of commercial software in the calculation of power line mechanical dimensioning, electric parameters and cable selection and dimensioning.

#### Learning Outcomes

- define the main principles of electric power transmission
- explain the function of electric transmission system elements
- analyze and calculate electric parameters of the elements of electric transmission system
- analyze the electric circumstances of electric transmission system
- plan the development of electric transmission system
- choose new elements of electric transmission system

#### Forms of Teaching

**Lectures**Lectrures are given with the use of powerpoint presentations published on the web pages. The lectures are organized through 2 cycles. The first cycle consists of 7 weeks of lectures and 1st midter. Second cycle has 6 weeks of lectures and final exam. The lectures are given in total of 13 weeks, four hours per week.

**Exams**midterm exam, final exam and oral exam

**Exercises**2 hours per week. The exercises follow the lectures with practical and numerical examples. The focus is on the implementation of the solution methods.

**Laboratory Work**6 laboratory exercises

**Experimental Exercises**demonstration of equipment for the power transmission and distribution (conductors, insulators and other equipment)

**Consultations**Consultation term is determined on the first lecture in agreement with the students.

**Other**homeworks

#### Grading Method

Continuous Assessment | Exam | |||||
---|---|---|---|---|---|---|

Type | Threshold | Percent of Grade | Threshold | Percent of Grade | ||

Laboratory Exercises | 0 % | 10 % | 0 % | 10 % | ||

Homeworks | 0 % | 10 % | 0 % | 10 % | ||

Mid Term Exam: Written | 34 % | 25 % | 0 % | |||

Final Exam: Written | 34 % | 35 % | ||||

Final Exam: Oral | 20 % | |||||

Exam: Written | 50 % | 50 % | ||||

Exam: Oral | 30 % |

#### Week by Week Schedule

- Short history of electrification. Electric power networks (by voltage levels, function, shape, etc.) Overhead-lines (conductors, poles and towers, insulation, protective and other equipment).
- Parameters for the mechanical calculation of overhead lines. Line length and sag determination. Line state equations. montage tables.
- Symmetrical components. Line resistance (temperature dependability, skin effect). Like conductance. Corona and critical voltage.
- Line inductance. Inductance determination in single-phase and three-phase lines. Median geometric distances method.
- Inductance determination with ground influence (Carson formulae). Matrix methods in inductance determinations (direct and null system).
- Line capacitance. Capacitance in single-phase and three-phase lines. Ground influence. Matrix methods.
- Transmission theory. General solution of transmission equations.
- Forms of transmission equations.
- Ideal line (unloaded, in short circuit, optimal power transmission). Real line.
- Mathematical models of lines (Pi-model, T-model, Gamma-model, etc.) Determination of voltages and currents in static operation.
- Transient phenomena on power lines. Transient resistance and travelling waves. Examples with unloaded lines and grounded lines.
- Distribution networks (by voltage levels, shape, load, grounding, etc.) Voltage drops and power losses. Line dimensioning and selection.
- Electric conditions in mashed distribution networks. Electric conditions in distribution networks with two sided supply.
- Cable networks. Electric power cables ( by insulation voltage level, etc.).
- Electric cable dimensioning and selection. Distribution network grounding.

#### Study Programmes

##### University undergraduate

#### Prerequisites

#### Literature

*Električne energetske mreže*, FESB : Opal computing

*Modern Power System Control and Operation*, Kluwer Academic Publishers

*Power System Analysis*, McGraw-Hill

#### Lecturers

#### Exercises

#### Laboratory exercises

#### General

**ID**127563

**4**ECTS

**L3**English Level

**L1**e-Learning

#### Grading System

**90**Excellent

**80**Very Good

**70**Good

**60**Acceptable