Module Specification

The information contained in this module specification was correct at the time of publication but may be subject to change, either during the session because of unforeseen circumstances, or following review of the module at the end of the session. Queries about the module should be directed to the member of staff with responsibility for the module.
Title POWER SYSTEMS: ANALYSIS AND DYNAMICS
Code ELEC402
Coordinator Dr C Zachariades
Electrical Engineering and Electronics
C.Zachariades@liverpool.ac.uk
Year CATS Level Semester CATS Value
Session 2019-20 Level 7 FHEQ First Semester 15

Aims

To give students a generalised view of the structure and operation of a modern power system. To develop the ability to analyse the steady-state and transient performance of an integrated power system, and control and stable operation of the power system concerning rotro-angle, voltage and frequency stability power flow and economic operation, and dynmic and control of power system. To introduce the basic principles of fault analysis and electrical safety regulations. To familiarise students with some basic concepts of power electronics and to provide them with the tools to design some basic circuits. To understand the principles of operation of power converters. To show how power electronics and machines are complementary components of drive or generating systems, through examples of practical applications.


Pre-requisites before taking this module (other modules and/or general educational/academic requirements):

ELEC120 ELECTROMAGNETISM & ELECTROMECHANICS; ELEC210 ELECTROMAGNETICS 

Co-requisite modules:

ELEC498 MSC PLACEMENT EXPERIENCE 

Learning Outcomes

(LO1) An advanced understanding of the nature of the load on a power system and the way in which power is supplied by generators and transmitted to consumers. A clear understanding of how synchronous generators (alternators) interact with a power system in both normal and fault conditions. Knowledge of how these generators are interconnected by the high-voltage transmission grid. Advanced knowledge of complex power flow in a network.

(LO2) An understanding of the matrix analysis of the network and load flow analysis. Good command of the per-unit system in the analysis of large power systems. A clear understanding of the consequences of different faults on transmission and distribution networks. Good awareness of general electrical safety issues. Advanced knowledge of various applications of power electronics in power systems and renewable energy.

(LO3) A deep understanding of power system stability problems, analysis method and how to use control devices to maintain and improve the stability.

(S1) Discipline specific practical skills, such as experience in analysis and design of power systems employing a broad range of industrial related engineering tools (e.g. power circle diagram and equal area stability criterion), and utilisation of different control devices in power transmission grid to improve the stability。

(S2) Independent learning, problem solving and design skills applied to power systems modelling, analysis and dynamic performance.

(S3) Application of numerical methods to solve power flow problems, economic dispatch and stability assessment.

(S4) Ability to produce clear, structured written work including simulation results.

(S5) Use of Matlab/Simulink for power system analysis and control.


Syllabus

 

1. Introduction pf power systems and their main components, network layout, voltage and frequency regulation, power quality, present and future challenges.

2. Power generation: active, reactive, complex and apparent power, complex power flow, three-phase systems, synchronous machine operation, relationship between phase angle and active power and between voltage magnitude and reactive power.

3. Power flow: Definition of nodes in a network, admittance matrix, power flow problem formulation, Gauss-Seidel and Newton-Raphson methods for numerical solutions.

4. Introduction to power system economics and trade-off between economical and secure supply. Economic dispatch (ED) and unit commitment (UC). Using optimisation methods to solve the ED and UC problem.
5. Electricity markets and power system economics:foundation of microeconomics and risk, market player and basic structure of electricity market; electricity marketplaces and participation in market.
6. Fault analysis: Balanced and unbalanced short-circuit faults, calculation of short-circuit currents, role of neutral connections, circuit breaker operation.

7. Electrical safety, Electric shock, direct and indirect contacts, regulations for distribution networks, ground and neutral connections, residual-current circuit breaker.

8. Induction of different power system stability problem: rotor-angle stability, voltage stability and frequency stability.
9. Dynamic model of power system including components such as synchronous generator, transformer, transmission lines, power system loads, excitation systems and governors.
10. Rotor angle stability analysis: Steady-state stability, generator electrical and mechanical model, inertia and rotor dynamics, steady-state stability limit, transient stability, generator swing equation, equal area criterion, faults and critical clearing time.
11. Small and large disturbances stability studies including power system mo dal analysis, equal area criterion and techniques to assess small and large disturbance stability of small and large power systems.
12. Methodologies for designing and tuning damping controllers and for enhancement of small and large disturbance power system stability. Local control and wide-area damping control.
13. Voltage control and stability assessment.
14 Frequency regulation and load frequency control.


Teaching and Learning Strategies

Teaching Method 1 - Lecture
Description:
Attendance Recorded: Yes

Teaching Method 2 - Tutorial
Description:
Attendance Recorded: Yes


Teaching Schedule

  Lectures Seminars Tutorials Lab Practicals Fieldwork Placement Other TOTAL
Study Hours 28

  8

      36
Timetable (if known)              
Private Study 114
TOTAL HOURS 150

Assessment

EXAM Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
Formal written exam This is an anonymous assessment. Assessment Schedule (When) :Semester 1 examination period There is a resit opportunity. Standard UoL penalty applies for late submission.  3 hours    75       
CONTINUOUS Duration Timing
(Semester)
% of
final
mark
Resit/resubmission
opportunity
Penalty for late
submission
Notes
System analysis/design report and software simulation There is a resit opportunity. Standard UoL penalty applies for late submission. This is not an anonymous assessment. Assessment Schedule (W      25       

Reading List

Reading lists are managed at readinglists.liverpool.ac.uk. Click here to access the reading lists for this module.