The University of Southampton
Courses

# ELEC3214 Power Systems Technology

## Module Overview

- To introduce the students to fundamental concepts relating to the design and management of modern electrical power systems. - To develop amongst the students an awareness of technical problems associated with operation of such systems. - To teach the students basic theory and equip them with necessary analytical, numerical and modelling skills for handling particular problems. Students are not required to have taken ELEC2213 before taking ELEC3214, but it is strongly recommended.

### Aims and Objectives

#### Module Aims

The aim of this module is to introduce the students to fundamental concepts relating to the design and management of modern electrical power systems.

#### Learning Outcomes

##### Knowledge and Understanding

Having successfully completed this module, you will be able to demonstrate knowledge and understanding of:

• Fundamental concepts of operation of electrical power systems; representation of various components of the system; theory of balanced and unbalanced faults; basic concepts of stability; control of power, frequency, voltage and VAr flows; simple methods for modelling and simulation of power systems
##### Transferable and Generic Skills

Having successfully completed this module you will be able to:

• Apply modern modelling techniques, tackle problems of interdisciplinary nature
##### Subject Specific Practical Skills

Having successfully completed this module you will be able to:

• Use the concept of symmetrical components in analysis, solve typical problems associated with faults, apply the notation of per unit system, interpret results from power system analysis
##### Subject Specific Intellectual and Research Skills

Having successfully completed this module you will be able to:

• Appreciate the complexity of operation power systems, analyse simple cases of power system stability, identify some elements of automatic control in power systems, benefit from application of per unit system

### Syllabus

The physical nature of large interconnected systems. - The evolution of electrical power systems, the integration and interconnection of the transmission system, the various voltage and current levels. Introduction to power system analysis. - Balanced three-phase systems, phasors, calculations in the phasor domain, equivalent line-to-neutral diagrams, complex impedance, star-delta transformation, real, reactive, apparent and complex power, power factor, power in single-phase circuits, power in three-phase circuits. Relationship between voltage reactive power, power and transmission angle. - Importers and exporters or positive and negative VArs, power flow between active and passive units, derivation of transmission equation. Representation of parameters of rotating machines, transformers, lines, cables, switchgear and loads. - Equivalent circuits, their simplification and justification but also limitations on use, system representation for various conditions. Per unit system and symmetrical components. - Review of per unit system and its use, the choice of base quantities for per unit calculations, review of symmetrical component theory and derivation, both graphical and matrix. Solution of systems with balanced and unbalanced faults. - Simple fault analysis of single line to ground, double line to ground, line to line and three phase to ground with fault impedances, all using sequence diagrams; the introduction to transformer connections into fault calculations; basic three phase short circuit on a machine; brief review of sub-transient, transient and synchronous reactance and their physical origins; brief introduction to how computer methods are applied. Control of power and frequency in interconnected systems. - Governor characteristic and equations; calculation of power sharing; normal methods of frequency control. Control of voltage and VAr flows. - AVR response and VAr generation, static VAr compensators, injection of reactive power, tap-changing transformers; power factor correction, calculation of voltage profile and effect on VAr flow. Stability. - Definition, types of stability studies, automatic control of synchronous generators, limitation of magnitude of power transmittable, steady state stability, transient stability, swing equation, equal area criterion, effects of type of fault on stability, multi-machine studies, methods for improving.

### Learning and Teaching

TypeHours
Follow-up work18
Revision10
Lecture36
Preparation for scheduled sessions18
Total study time150

J.D. Glover, M. Sarma, T. Overbye (2011). Power Systems Analysis and Design.

Pieter Schavemaker, Lou van der Sluis (2008). Electrical Power System Essentials.

B.M. Weedy, B.J. Cory (1998). Electric Power Systems.

### Assessment

#### Summative

MethodPercentage contribution
Exam  (2 hours) 100%

#### Referral

MethodPercentage contribution
Exam 100%

#### Repeat Information

Repeat type: Internal & External