MEng Mechatronic Engineering

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BRIEF DESCRIPTION OF THE UNIT

Power System Dynamics (17)

• Introduction to the module and review of general dynamic characteristics and control requirements of power systems as well as the classification of power system stability and instability phenomena. (3 hours)
• Modelling of major power system components and controls for power system dynamic studies including (4 hours)
• Review of synchronous generator operation and reduced dynamic models, including associated controllers
• Power system loads, excitation systems and governors and review of transmission lines and transformers models
• Methodologies for small and large disturbances stability studies including power system modal analysis, equal area criterion, classical transient stability model and techniques to assess small and large disturbance stability of small and large power systems. Theoretical stability limits and its practical use, including impact of non-linearities (5 hours) 
• Methodologies for designing and tuning damping controllers and for enhancement of small and large disturbance power system stability (3 hours).
  Basics of frequency and voltage stability. Low frequency phenomena (4 hours)

Converter interfaced units modelling and control for power system dynamic studies (14)

• Converter transients modelling (2 hours)
• Converter modelling fidelity
• Different modelling levels for different types of studies (RMS and EMT simulation frameworks).
• FACTS and HVDC static and dynamic modelling (5 hours)
• Simplified 3-phase inverter representation
• Inverter DQ current control and Q/P/Vac/Vdc control
• Renewables and storage (3 hours)
• Control aspects and schemes
• Modelling and simulation
• Converter stability and system interactions (4 hours)
• High frequency phenomena

Example classes and Computer simulation laboratory (11 hours)

• Example classes (5 hours)
• Computer simulation laboratory covering elements of steady state voltage stability assessment and large disturbance (transient) stability assessment. The laboratory will cover the influence of load modelling on voltage stability, effects of automatic voltage regulators (AVRs), damping controllers, fault location and fault critical clearing time, generator loading and inertia on large disturbance stability. (6 hours)

This unit aims to: Introduce students to power system dynamics and stability and develop an awareness of the reasons for changes in power system dynamic behaviour from the proliferation of converter interfaced technologies. Revise and build on control systems analysis for electrical/mechanical systems and power networks. The unit develops models for use in system studies and integration studies of renewables. These include machines, power electronic converters, other actuators, control mechanisms and electrical and thermal considerations. The unit will also revise techniques for dynamic analysis of faulted power systems and apply these to larger networks to evaluate post-fault system performance.

On successful completion of this unit, a student will be able to:

ILO 1: Formulate, judge and explain basic principles of power system dynamics and causes of it in modern power systems

ILO 2: Formulate the explain the reasons for the changes in system dynamic behaviour that will be caused by proliferation of low carbon technologies; Categorize and compare subdivisions of power system dynamic and stability phenomena.

ILO 3: Derive models of power system components such as, synchronous and renewable generation, storage and demand technologies and associated controls, as well as transformers, converts, AC and HVDC transmission lines and most widely used FACTS devices for transient studies; Evaluate, analyse and compare their behaviours.

ILO 4: Evaluate and analyse different aspects of power system stability including rotor angle stability, voltage stability, frequency stability, resonance stability and converter driven stability.

ILO 5: Design the software models, apply the software tools to simulate and analyse different aspects of power system dynamic behaviour and stability

ILO 6: Design and evaluate appropriate measures to improve or ensure power system stability; Develop and analyse the procedures for the tuning of power system controllers.

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