It is not possible to consider BS directly as an optimization variable in MATPOWER. However, you can place a generator at the bus of interest, restrict the active power output to zero and solve the OPF to find the optimal reactive injection, then convert that injection to the corresponding shunt susceptance value.
Regarding the starting point for optimization variables when using Knitro to solve the OPF, by default, MATPOWER will use the voltage and angle values found in the bus matrix, and the PG and QG values in the gen matrix as the starting point. This can be disabled with the opf.init_from_mpc option. Ray > On Jun 19, 2016, at 9:32 PM, Hideharu SUGIHARA > <[email protected]> wrote: > > Dear Dr. Zimmerman and Matpower cummunity, > > I am using the Matpower ver 5.1. > > Is it possible to consider BS (shunt susceptance) as an optimization variable > in Matpower ? > > Reactive power output from generators has already considered as a variable in > Matpower. > However, in that case, I think that generator buses must be specified as > PV-type buses. > I want to use the reactive power injection (and extraction) as a variable at > PQ-type > load buses in AC-OPF for a convergence problem caused by the bus voltage > constraints. > > Also, I am using the Knitro as a solver for AC-OPF. > I want to know how to specify the initial guess (starting point) of variables > (e.g. bus voltage magnitudes and angles). > > best regards, > > Hideharu > >
