Sumários
Review and Introduction to Newton's method
3 outubro 2017, 09:30 • Luis Marcelino Ferreira
Review of power flow equations as I=YV
Jacobi-Gauss: application, origin as from Ax=b for exact or approximate results
Linearity and nonlinearity, diagonal properties
Moving into Newton’s methods: what is the idea, what is expected, what is needed
Power flow equations in real format
Based on matrix analysis
Based on line parameters
Number of variables and number of equations
Which index should be given to the reference bus
Generator buses need only one eq per bus
Fundamentals of Newton’s
The importance of derivatives
Newton’s and Taylor’s
Interpretation
Load and xf
28 setembro 2017, 11:00 • Luis Marcelino Ferreira
Active load and constant power
Passive load and constant admittance
Load as constant current
Load as a combination of loads
The concept of elasticity or sensitivity of power demand wrt voltage
P=KV^alpha
Nonpolynomial versus polynomial forms
Convenience of moving passive loads to diagonal elements of Y
Xfs as an important element of the networks
1, 2, 3, 4 winding xfs (per phase)
When, where and what for
Voltage regulating xf
Another form to make a PV bus
Steinmetz models
Models: RLC model, matrix model
Nonsymmetric admittance matrix for phase-shifter