Electric Power Systems, 5 cr

Core content

• Week 1. Transmission Line Performance: Active and reactive power flows in short, medium and long transmission lines, SIL. Principles of compensation
• Week 2. Power Flow Analysis: Basic theory, power flow solution algorithms (e.g.. Newton-Raphson, Fast Decoupled)
• Week 3. Short-Circuit Analysis: Background theory, fault level and the representation of classical power system faults
• Week 4. Unsymmetrical Fault Analysis & Introduction to Power Quality
• Week 5. Grid Operation & Frequency Control: Principles and hierarchy of frequency control. Primary and secondary frequency control. General principles of grid operation in today’s power industry.
• Week 6. Voltage Control & Stability: Equipment for voltage control and reactive power compensation. Primary voltage control. Voltage control principles in Finland. Basics of voltage stability and voltage collapse. Voltage stability analysis methods: PV- and VQ-curves.
• Week 7. Power Systems Stability: Stability classification, swing equation, power-angle equation and equal-area criterion. Classical model of synchronous machine. Analysis of simple systems

Complementary knowledge

• Week 1. Transmission Line Performance: Standing waves and basic concepts of corona effects
• Week 2. Power Flow Analysis: Computer-based power flow solutions of medium and large-scale power systems
• Week 3. Short-Circuit Analysis: Power flow-initialized short-circuit analyses Advanced transformer modelling
• Week 4. Unsymmetrical Fault Analysis: Bus impedance matrix method for analysis of unsymmetrical shunt faults
• Week 5. Grid Operation & Frequency Control: Area control error. Automatic generation control using SCADA and EMS systems. Advanced principles of grid operation and frequency control
• Week 6. Voltage Control & Stability: Secondary voltage control. Modelling of SVC, tap changer and polynomial loads in Newton-Raphson power flows.
• Week 7. Power Systems Stability: Analysis of multi-machine systems, combination of dynamic and static equations, factors influencing angle stability. Introduction to small signal stability

Specialist knowledge

• Week 1. Transmission Line Performance: At harmonic frequencies
• Week 2. Power Flow Analysis: Sparse matrix techniques Three-phase power flows
• Week 3. Short-Circuit Analysis: Dynamics of short-circuits, circuit breaker selection and protection relay studies
• Week 4. Applying sequence impedance matrices for accurate solutions of fault analysis with meshed transmission systems
  
• Week 5. Grid Operation & Frequency Control: Dynamics of grid operation and frequency control
• Week 6. Voltage Control & Stability: Dynamics of voltage control FACTS equipment
• Week 7. Power Systems Stability: State-space presentation of large-scale power systems for small signal stability analysis