Dear Dr Zimmerman,
Running an OPF in matpower means that
1. Bus types play no role (eg slack, PV, PQ etc)
2. All values for Real Power generation and reactive power generation are
unknown
3. All values for bus_voltages and voltage phase angles in buses, are unknown
as well
4. As a result, all values for real and reactive power flows are unknown.
5. Losses are unknown.
What is known :
1. The resistance, reactance, admittance per unit / per conductor
2. Values for Real and Reactive demand at each bus
3. Limits on voltage magnitude , limits on real and reactive power generation
4. MVA limits on each line
5. Fuel cost for each generator.
So my question is
a. Are the above correct for matpower ?
b. Since matpower uses a non-linear optimisation, is the result a local minimum
or a global minimum?
(for the case of a cost-minimization OPF) ? i.e. the values for voltages,
reactive powers etc, are
globally optimum or perhaps other optimum values for all the unknown
quantities exist ?
Thank you,
Spyros Gian
