 |
Load-flow applications |
|
|
Models of the most important network elements
|
|
|
Performing a loadflow and interpretation of
error messages to debug the user data.
|
|
|
Use of built in tools to analyze the load flow
results. |
|
|
Examination of the models used for lines,
cables, transformers, synchronous and induction
machines, loads. |
|
|
Voltage control and tap changers.
|
|
|
Configuration of results and reporting.
|
|
|
Exercises 1 |
|
|
Load Flow Analysis with PowerFactory
o Execution of load flow calculations
o Documentation of results and input data
o Visualisation of data and results in the
single line diagram |
|
|
Dynamic Processes in Power Systems
o Time scales of dynamic phenomena in power
systems
o State space representation of power system:
Differential-Algebraic-Equation (DAE) model
o Power system dynamic simulation
o Different Types of Simulation and Requirements
for Accuracy
o Simulation work and required modelling
accuracy o Different types of simulation
|
|
|
Introduction to Stability o Fundamentals of
Power System Stability
o Frequency stability
o Voltage stability
o Rotor angle stability |
|
|
Models for Dynamic Power System Analysis
o Synchronous generators
o Induction generators
o Dynamic loads o Excitation systems
o Turbine and governing systems
|
|
|
Direct Approach to Rotor Angle Stability: The
One-Machine Problem
o Problem formulation
o Definition of stable and unstable equilibrium
points
o Equal area criterion for transient stability
analysis
o Small signal rotor angle stability (eigenvalues)
|
|
|
Handling of Time Domain Simulations –Stability
function- in PF |
|
|
RMS (Stability) vs. EMT-Simulations
|
|
|
Initialisation |
|
|
Event Definition |
|
|
Result Visualisation, Plots |
|
|
Exercises 2: |
|
|
Rotor angle stability under large disturbances
|
|
|
Modelling a one-machine system with PowerFactory
|
|
|
Entering the network data |
|
|
Entering machine data |
|
|
Determination of critical fault clearing times
V. Dynamic Modelling with PowerFactory
|
|
|
Introduction to DSL (DIgSILENT Simulation
Language)
o Frames and Composite Models
o Block Diagram and Common Models
o State Equations o Basic Modelling Blocks
(Integrator, Lead-Lag, non-windup and windup
limiters, etc.)
o DSL overview
o The standard DSL-macro library
o Drawing block diagrams with PowerFactory
|
|
|
Exercise 3+4: |
|
|
Simple Excitation System |
|
|
Entering the block diagram of a simple, static
excitation system |
|
|
Calculation of Initial Conditions
o Heuristic approach for model initialisation
o Application to Exercise 3
o Systematic approach for model initialisation
|
|
|
Exercise 5: |
|
|
Excitation System (AVR and PSS)
|
|
|
Modelling of AVR and PSS in the
one-machine-system |
|
|
Results of time-domain simulations VI. Modelling
of Wind Generation |
|
|
Wind Turbines – Basic Principles and Generator
Concepts
o Generating Electrical Power from Mechanical
Power
o Energy conversion systems
o Wind energy conversion, Betz law etc.
o Wind turbine components
o Status of technology |
|
|
Basic of Wind Energy |
|
|
Generator concepts in PowerFactory
o Fixed speed induction machine
o Induction generator with variable rotor
resistance
o Doubly- fed induction generator
o Wind generator with fully rated converter
|
|
|
Reduced Order Model for Wind Turbines Modelling
o Model of a Constant-speed Wind Turbine
|
|
Model structure and considerations
|
|
|
Rotor model |
|
|
Shaft model |
|
|
Generator model |
|
|
|
DSL Implementation of Constant-Speed Wind
Turbine
o Aerodynamic, Mechanical and Electric systems:
|
|
Frames and Composite Models
|
|
|
Block Diagram and Common Models
|
|
|
|
Exercise 6: |
|
|
Simple Constant-Speed Wind Turbine
|
|
|
Entering the block diagram of a Constant-Speed
Wind Turbine |
|
|
Exercise 7: |
|
|
Calculating the initial conditions of a
Constant-Speed Wind Turbine |
|
|
Exercise 8: |
|
|
Results of time-domain simulations: Dynamic
behaviour of wind turbines technologies during
short-circuit events |
more
POWER SYSTEM DYNAMIC
AND WIND POWER: Brief Introduction
