Power Flow Input Data

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

The minimum amount of information within an instance of the data structure required to run the module requires a bus, 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 are located in data.system.bus with the structure:

Column	Description	Unit
1	bus number
2	bus type
3	initial voltage magnitude	per-unit
4	initial voltage angle	degree
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 are located in data.system.generator with the structure:

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 are located in data.system.line with the structure:

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 are located in data.system.inTransformer with the structure:

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 are located in data.system.shiftTransformer with the structure:

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