Power Flow Input Data

The input data are located in the data_power_grid directory, as the mat-file with the struct variable data. The power system data is given in the variable data.system, with variables bus, generator, line, inTransformer, shiftTransformer, and baseMVA.

The minimum amount of information with each instance of the data structure to run the module requires bus and one of the variables line, inTransformer and shiftTransformer.

First, the system base power is defined in (MVA) using data.system.baseMVA, and in the following, we describe the structure of other variables involved in data.system.

data.system.bus

Column	Description	Unit
1	bus number	-
2	bus type	-
3	initial voltage angle	degree
4	initial voltage magnitude	per-unit
5	load real power injection	MW
6	load reactive power injection	MVAr
7	conductance of the shunt element (equivalent power)	MW
8	susceptance of the shunt element (equivalent power)	MVAr
9	minimum voltage magnitude	per-unit
10	maximum voltage magnitude	per-unit

data.system.generator

Column	Description	Unit
1	bus number	-
2	generator real power injection	MW
3	generator reactive power injection	MVAr
4	minimum reactive power injection	MVAr
5	maximum reactive power injection	MVAr
6	voltage magnitude	per-unit
7	on/off status	-

data.system.line

Column	Description	Unit
1	from bus number	-
2	to bus number	-
3	transmission line resistance	per-unit
4	transmission line reactance	per-unit
5	total transmission line charging susceptance	per-unit
6	on/off status	-

data.system.inTransformer

Column	Description	Unit
1	from bus number	-
2	to bus number	-
3	in-phase transformer resistance	per-unit
4	in-phase transformer reactance	per-unit
5	total in-phase transformer charging susceptance	per-unit
6	turns ratio	-
7	on/off status	-

data.system.shiftTransformer

Column	Description	Unit
1	from bus number	-
2	to bus number	-
3	phase-shifting transformer resistance	per-unit
4	phase-shifting transformer reactance	per-unit
5	total phase-shifting charging susceptance	per-unit
6	turns ratio	-
7	shift angle	degree
8	on/off status	-