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.

Bus data is located in data.system.bus with the structure as follows.

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	shunt element (equivalent active power)	MW
8	shunt element (equivalent reactive power)	MVAr
9	minimum voltage magnitude	per-unit
10	maximum voltage magnitude	per-unit

Generator data is located in data.system.generator with the structure as follows.

Column	Description	Unit
1	bus number	-
2	real power injection	MW
3	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	-

Transmission line data is located in data.system.line with the structure as follows.

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

In-phase transformer data is located in data.system.inTransformer with the structure as follows.

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

Phase-shifting transformer data is located in data.system.shiftTransformer with the structure as follows.

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