Sumários
Jacobi-Gauss and PV buses
22 setembro 2015, 09:30 • Luis Marcelino Ferreira
Review of
PQ bus
PV bus
Reference bus
Slack bus
The two-bus system with a PV bus
Phase angles as “state” variables
Adapt Jacobi-Gauss method to handle PV buses
Review of the pu system and percentage
How to choose values for basis
Typical quantities
The pi model for linesIntroduction
22 setembro 2015, 08:00 • Luis Marcelino Ferreira
The importance of understanding the basics
Simplest problem in PS
Simplest problem in AR
Models: generator, line, load
Complex algebra
Circuit’s KCL and KVL
Matlab programming
Power as a product (in time and in steady-state)
Power source, S=VI*
KVL and KCL
Why PF is so important
A two bus system: reference generator, line, power demandSolving the two-bus pf problem (PQ node) in three ways:
(1) iteratively
(2) non-iteratively using polar coordinates
(3) non-iteratively using rectangular coordinatesPower flow or load flow
17 setembro 2015, 11:00 • Luis Marcelino Ferreira
Review of a power flow equation in complex notation
Power circles in a (p,q) plane
The importance of reactive support for power transfer
Generalization of the power flow equation for a system of any number of buses
Jacobi-Gauss procedure (how, why, when it works)
Classification of some bus types
A closed-form solution for a two bus system connected by a longitudinal impedance; feasible and infeasible solutions; the role of reactive power
Introduction
15 setembro 2015, 09:30 • Luis Marcelino Ferreira
Welcome notes
Online page
Course contents:
Power flow
Short circuit analysis
State estimation
Course structure
Lab tests (two)
Models for generator, line, load
Line as a two-port network
Linear model: Y, Z, H,
Symmetry and reciprocity
Two bus system
Writing the PF equation
Linearity and analyticity
How to solve it: Jacobi, Gauss
Fixed-point theorem
Iterative procedure: does it work?