Advanced Electrical Systems

Learning Outcomes

Knowledge and Understanding

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

• Concepts of smart grid, microgrid and distributed generation.
• Principle of operation and construction of synchronous generators and transformers and their equivalent circuits.
• Sizing and performance calculation of brushless dc machines.
• Magnetic field quantities, magnetic material properties, magnetic circuits, Faraday’s law, Lorentz force law, Maxwell stress, eddy current and hysteresis losses
• Power system stability, swing equation, equal area criterion.
• Principle of operation and construction of DC and brushless AC motors.
• Principle of operation of DC, induction and switched reluctance motors.
• Active, reactive and apparent power. Power factor and power factor correction.
• Principle of operation of common power electronic converters: rectifiers and inverter; PWM; space vector modulation.
• Analysis of 3 phase AC circuits and the per-unit system.

Transferable and Generic Skills

Having successfully completed this module you will be able to:

• Apply generic approach of problem solving and design principles in the field of electric machines, power systems and power electronics to other engineering subjects, especially when there is an analogy between the governing equations.

Partial CEng Programme Level Learning Outcomes

Having successfully completed this module you will be able to:

• As part of the final exam and self-assessed coursework, the students must demonstrate the ability to apply knowledge of mathematics, physics and engineering of electrical systems to the solution of power system circuits, power system stability, electrical machines and actuators.
• In the exam, the students are expected to be able to analyse complex problems of electrical machines and actuators and power systems using first principles of fundamental theory.

Subject Specific Intellectual and Research Skills

Having successfully completed this module you will be able to:

• Use basic understanding of common power electronic converters to understand the operation of other advanced topologies discussed in the scientific literature and conceive of new ones for new and emerging technologies.
• Size and estimate the performance of electromagnetic devices.
• Appreciate the basic design rules of electromagnetic devices
• Apply basic electromagnetic theory to the analysis and design of electromagnetic devices including the ones covered in this module, and appreciate the limitations of the theory

Full CEng Programme Level Learning Outcomes

Having successfully completed this module you will be able to:

• Select and apply appropriate computational and analytical techniques to model complex electrical systems problems with sufficient recognition on limitations of the technique. which is assessed in the final closed book exam and self-assessed coursework.

Magnetic Fields:

• Magnetic field quantities
• Magnetic material properties
• Magnetic circuit and inductance
• Faraday’s law of induction
• Magnetic force calculation: Lorentz force law; energy method and Maxwell stress
• AC losses in laminations.
• Case study: Coriolis mass flow meter.

Power Generation and Transmission

• Power transmission system architecture.
• Synchronous Generator: principle of operation; construction; emf calculations.
• Transformer: principle of operation; equivalent circuits parameter estimation; single and 3-phase transformers.
• Distributed generation: renewables; exhaust energy recovery.
• Power electronic converters: rectifiers; DC/DC converters; DC/Ac inverters.
• Smart grid and microgrids

Power System Analysis:

• Review of AC circuit theory.
• Three phase circuits, power calculations, reactive power, power factor and power factor corrections,
• per unit systems

Power System Stability

• Types of stability study,
• The swing equation
• Equal area criterion
• Transient stability analysis of a single generator connected to an infinite bus.

Introduction to Induction, Switched Reluctance Machine and DC Machines:

• Induction Machine: construction and principle of operation.
• Switched Reluctance Machines: construction and principle of operation
• DC Machine: Construction and principle of operation; DC machine Relationship between torque and size and the calculation of Kt and Ke; dq model; Wound field machines their torque-speed characteristics.

Permanent Magnet Synchronous Motors:

• Brushless DC motor: construction and principle of operation of the brushless dc motor with trapezoidal emf and quasi-squarewave currents; design choices (number of poles, rotor configuration, number of slots etc.); detailed motor design (sizing) example;
• Case Study: Rim driven thrusters. The students then have the opportunity to design a brushless dc motor for a rim driven thruster.
• Brushless AC motor: construction and principle of operation; dq model; vector control.

Teaching methods include

• Lectures including examples, with notes and copies of the presentation available on Blackboard.

Learning activities include

• Directed reading
• Individual work on formative coursework.

Summative

This is how we’ll formally assess what you have learned in this module.

Referral

This is how we’ll assess you if you don’t meet the criteria to pass this module.

Repeat

An internal repeat is where you take all of your modules again, including any you passed. An external repeat is where you only re-take the modules you failed.