To give students a generalised view of the structure of a power system. To develop the ability to analyse the steady-state and transient operation of an integrated power system in terms of the electrical and other constraints on power flow. 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.

(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.  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.

(LO2) An advanced understanding of AC-DC uncontrolled and controlled rectifiers.  An understanding of pulse width modulation to control voltage and its development into switching DC-DC supplies.  An understanding of the AC(-AC) voltage control.  An advanced understanding of the electronic generation of AC from DC and the ability to vary frequency.  An understanding of variable speed DC and AC drives.  A clear understanding of the fundamental ON-OFF nature of power electronic switches and how they are controlled to vary voltage levels and frequency.  Advanced knowledge of various applications of power electronics in power systems and renewable energy.

(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 power electronic based devices in power transmission grid and integration of large scale of renewable energy.

(S2) Independent learning, problem solving and design skills applied to power systems and power electronics.

(S3) Application of numerical methods to solve power flow problems.

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

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

PART 1 – POWER GENERATION, TRANSMISSION AND DISTRIBUTION

Introduction Review of power systems and their main components, network layout,voltage and frequency regulation, power quality, present and future challenges,introduction to power flow, stability and fault analysis.

Power generation   Review of active, reactive, complex and apparent power, complex powerflow, three-phase systems, synchronous machine operation, power circle diagram,relationship between phase and active power and between voltage magnitude andreactive power, generator operating chart.

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.

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

Fault analysis Balanced and unbalanced short-circuit faults, calculation of short-circuit currents, role of neutral connections, circuit breaker operation.

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

PART 2 – POWER ELECTRONICS

Introduction Review of semiconductor devices and their properties, introduction to power electronics for power systems, general principles of power conversion, rectification and inversion.

DC-DC converters: Buck and boost converters, pulse-width-modulation operation, input ripple current and output ripple voltage, other converter topologies.

AC-DC rectifiers: Single-phase and three-phase, uncontrolled and controlled rectifiers,input and output waveforms, harmonic analysis, filters, electromagnetic interference problems and other issues.

DC-AC inverters: Single-phase and three-phase in verters, square-wave operation,sinusoidal pulse-width-modulation operation.

AC-AC converters: Phase control and on-off control, light dimmers, static switches and solid-state relays.

Practical applications: Examples of power electronics applications, DC and AC drives, interconnection of renewable energy sources, high-voltage DC transmission, flexible AC transmission systems.

Teaching Method 1 - Lecture
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Attendance Recorded: Yes

Teaching Method 2 - Tutorial
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Attendance Recorded: Yes