Resilient electrical power systems are an essential part of the infrastructure essential for a modern society. This module will deepen your insights into steady-state power system operation and develop your skills in power system analysis. Hand calculations on a simple 3-bus power network will help you understand simulation-aided power flow calculation on a large interconnected power network. Symmetrical components will be used to calculate and analyse balanced and unbalanced faults in a power network. An important aspect of this module is the delivery style, a mixture of theoretical and practical lectures and simulation-based laboratory exercises.
This module aims to develop your understanding of power system operation and its analysis from multiple core engineering perspectives. On successful completion of this module, you will attain the capability to calculate power flows in large power systems by iterative numerical approaches and calculate fault currents using the symmetrical component approach. This module will increase your confidence in performing an independent assessment of the steady-state operational conditions associated with a power system.
INTENDED LEARNING OUTCOMES (ILOs) (see assessment section below for how ILOs will be assessed)
Module Specific Skills and Knowledge:
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Understand the principle of power system operation
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Proficiently use analytical measures to describe steady-state operation in a large interconnected network
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Apply iterative methods to manually calculate power flows in a simple network
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Use simulation software to calculate power flow in complex interconnected networks
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Understand different fault types in power system, and apply the symmetrical component method to build up the sequence networks and calculate the fault currents under symmetrical and asymmetrical fault conditions
Discipline Specific Skills and Knowledge:
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Demonstrate understanding of using mathematical approaches to solve engineering problems in power system
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Understand the engineering philosophy behind the control measures used in a power system and assess the practical limits of each solution
Personal and Key Transferable/ Employment Skills and Knowledge:
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Increase independent engineering thinking and develop the problem-solving skills for real-world engineering
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Be skilful in planning and implementing simulation-based validation work
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Perform data analysis and deliver a professional presentation of the results and conclusions
SYLLABUS PLAN - summary of the structure and academic content of the module
Whilst the module’s precise content may vary from year to year, an example of an overall structure is as follows:
Fundamentals:
- Introduction: transmission and distribution networks, power system structure, generation and load profile;
- Analytical skills: phasor representation; active power P and reactive power Q; per-unit analysis; inductive and capacitive load; power quality; power factor
Power flow analysis:
- Basics of power flow: 3-bus power flow; bus classification (PQ, PV, slack); power flow equation
- Power flow in large system: admittance matrix; formulation; Gauss-Seidel method; Newton-Raphson method; power transfer capability; transmission losses; contingency analysis
- Control of power flow: FACTS device; change of tap changer; quadrature booster
Faults in power system:
- Symmetrical fault analysis: three-phase fault; fault level; short-circuit analysis
- Asymmetrical fault analysis: single-phase and two-phase faults; positive-, negative- and zero-sequence components; sequence network; sequence voltage, current and impedance