Per-unit Conventions

It is often useful to express power systems data in relative terms using per-unit conventions. PowerSystems.jl supports the automatic conversion of data between three different unit systems:

"NATURAL_UNITS": The naturally defined units of each parameter (typically MW).
"SYSTEM_BASE": Parameter values are divided by the system base_power.
"DEVICE_BASE": Parameter values are divided by the device base_mva.

To see the unit system setting of a System:

┌ Error: Matlab parser skipping line number 802 consisting of:
│   ];
└ @ PowerSystems ~/work/PowerSystems.jl/PowerSystems.jl/src/parsers/im_io/matlab.jl:64
[ Info: Correcting vm in bus 101 to 1.0468 to match generator set-point
[ Info: Correcting vm in bus 102 to 1.0467 to match generator set-point
[ Info: Correcting vm in bus 107 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 113 to 1.0347 to match generator set-point
[ Info: Correcting vm in bus 115 to 1.0428 to match generator set-point
[ Info: Correcting vm in bus 116 to 1.0461 to match generator set-point
[ Info: Correcting vm in bus 201 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 202 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 207 to 0.9699 to match generator set-point
[ Info: Correcting vm in bus 213 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 215 to 1.0437 to match generator set-point
[ Info: Correcting vm in bus 216 to 1.0473 to match generator set-point
[ Info: Correcting vm in bus 301 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 302 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 307 to 0.9568 to match generator set-point
[ Info: Correcting vm in bus 313 to 1.0 to match generator set-point
[ Info: Correcting vm in bus 315 to 1.0422 to match generator set-point
[ Info: Correcting vm in bus 316 to 1.0449 to match generator set-point
[ Info: Correcting vm in bus 114 to 1.0441 to match generator set-point
[ Info: Correcting vm in bus 214 to 1.05 to match generator set-point
[ Info: Correcting vm in bus 314 to 1.0 to match generator set-point
[ Info: Correcting vm in bus 118 to 1.0 to match generator set-point
[ Info: Correcting vm in bus 122 to 1.0 to match generator set-point
[ Info: extending matpower format with data: areas 3x3
[ Info: extending matpower format with data: gen_name 158x4
[ Info: added zero cost function data for dclines
[ Info: extending matpower format by appending matrix "gen_name" in to "gen"
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 5 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 5 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 56 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 56 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 35 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 35 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 55 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 55 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 110 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 110 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 114 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 114 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 60 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 60 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 30 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 30 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 32 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 32 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 6 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 6 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 67 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 67 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 45 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 45 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 117 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 117 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 73 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 73 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 115 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 115 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 112 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 112 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 64 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 64 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 90 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 90 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 4 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 4 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 13 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 13 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 54 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 54 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 63 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 63 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 86 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 86 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 104 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 104 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 91 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 91 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 62 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 62 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 58 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 58 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 52 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 52 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 12 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 12 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 28 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 28 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 75 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 75 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 23 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 23 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 111 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 111 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 92 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 92 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 41 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 41 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 43 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 43 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 11 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 11 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 36 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 36 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 68 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 68 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 69 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 69 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 98 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 98 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 82 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 82 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 85 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 85 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 118 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 118 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 119 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 119 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 39 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 39 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 84 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 84 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 77 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 77 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 7 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 7 from 90.0 to 60.0 deg.
[ Info: this code only supports angmin values in -90 deg. to 90 deg., tightening the value on branch 25 from -90.0 to -60.0 deg.
[ Info: this code only supports angmax values in -90 deg. to 90 deg., tightening the value on branch 25 from 90.0 to 60.0 deg.
[ Info: the voltage setpoint on generator 123 does not match the value at bus 308
[ Info: the voltage setpoint on generator 117 does not match the value at bus 212
[ Info: the voltage setpoint on generator 136 does not match the value at bus 320
[ Info: the voltage setpoint on generator 104 does not match the value at bus 310
[ Info: the voltage setpoint on generator 122 does not match the value at bus 119
[ Info: the voltage setpoint on generator 75 does not match the value at bus 122
[ Info: the voltage setpoint on generator 111 does not match the value at bus 319
[ Info: the voltage setpoint on generator 148 does not match the value at bus 320
[ Info: the voltage setpoint on generator 77 does not match the value at bus 122
[ Info: the voltage setpoint on generator 108 does not match the value at bus 324
[ Info: the voltage setpoint on generator 76 does not match the value at bus 122
[ Info: the voltage setpoint on generator 156 does not match the value at bus 303
[ Info: the voltage setpoint on generator 18 does not match the value at bus 118
[ Info: the voltage setpoint on generator 116 does not match the value at bus 104
[ Info: the voltage setpoint on generator 140 does not match the value at bus 320
[ Info: the voltage setpoint on generator 79 does not match the value at bus 122
[ Info: the voltage setpoint on generator 141 does not match the value at bus 320
[ Info: the voltage setpoint on generator 138 does not match the value at bus 320
[ Info: the voltage setpoint on generator 106 does not match the value at bus 312
[ Info: the voltage setpoint on generator 109 does not match the value at bus 324
[ Info: the voltage setpoint on generator 107 does not match the value at bus 310
[ Info: the voltage setpoint on generator 78 does not match the value at bus 122
[ Info: the voltage setpoint on generator 105 does not match the value at bus 324
[ Info: the voltage setpoint on generator 137 does not match the value at bus 320
[ Info: the voltage setpoint on generator 154 does not match the value at bus 309
[ Info: the voltage setpoint on generator 121 does not match the value at bus 103
[ Info: the voltage setpoint on generator 80 does not match the value at bus 122
[ Info: the voltage setpoint on generator 155 does not match the value at bus 317
[ Info: the voltage setpoint on generator 97 does not match the value at bus 320
[ Info: the from bus voltage setpoint on dc line 1 does not match the value at bus 113
[ Info: the to bus voltage setpoint on dc line 1 does not match the value at bus 316
[ Info: simplifying pwl cost on generator 110, [0.0, 0.0, 0.312, 0.0, 0.624, 0.0, 0.9359999999999999, 0.0] -> [0.0, 0.0, 0.9359999999999999, 0.0]
[ Info: simplifying pwl cost on generator 114, [0.0, 0.0, 0.0863333, 0.0, 0.1726667, 0.0, 0.259, 0.0] -> [0.0, 0.0, 0.259, 0.0]
[ Info: simplifying pwl cost on generator 123, [0.0, 0.0, 0.3363333, 0.0, 0.6726667000000001, 0.0, 1.0090000000000001, 0.0] -> [0.0, 0.0, 1.0090000000000001, 0.0]
[ Info: simplifying pwl cost on generator 117, [0.3, 0.0, 0.66, 0.0, 1.2, 0.0, 1.6, 0.0] -> [0.3, 0.0, 1.6, 0.0]
[ Info: simplifying pwl cost on generator 136, [0.0, 0.0, 0.091, 0.0, 0.182, 0.0, 0.273, 0.0] -> [0.0, 0.0, 0.273, 0.0]
[ Info: simplifying pwl cost on generator 145, [0.0, 0.0, 0.030333299999999997, 0.0, 0.060666700000000004, 0.0, 0.091, 0.0] -> [0.0, 0.0, 0.091, 0.0]
[ Info: pwl x value 0.0033333 is outside the bounds 0.0-0.0 on generator 73
[ Info: pwl x value 0.0066667 is outside the bounds 0.0-0.0 on generator 73
[ Info: pwl x value 0.01 is outside the bounds 0.0-0.0 on generator 73
[ Info: simplifying pwl cost on generator 73, [0.0, 0.0, 0.0033333, 0.0, 0.0066667, 0.0, 0.01, 0.0] -> [0.0, 0.0, 0.01, 0.0]
[ Info: simplifying pwl cost on generator 115, [0.0, 0.0, 0.0843333, 0.0, 0.1686667, 0.0, 0.253, 0.0] -> [0.0, 0.0, 0.253, 0.0]
[ Info: simplifying pwl cost on generator 153, [0.0, 0.0, 0.044000000000000004, 0.0, 0.08800000000000001, 0.0, 0.132, 0.0] -> [0.0, 0.0, 0.132, 0.0]
[ Info: simplifying pwl cost on generator 112, [0.0, 0.0, 0.41700000000000004, 0.0, 0.8340000000000001, 0.0, 1.251, 0.0] -> [0.0, 0.0, 1.251, 0.0]
[ Info: simplifying pwl cost on generator 151, [0.0, 0.0, 0.034333300000000004, 0.0, 0.0686667, 0.0, 0.10300000000000001, 0.0] -> [0.0, 0.0, 0.10300000000000001, 0.0]
[ Info: simplifying pwl cost on generator 90, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 139, [0.0, 0.0, 0.0906667, 0.0, 0.1813333, 0.0, 0.272, 0.0] -> [0.0, 0.0, 0.272, 0.0]
[ Info: simplifying pwl cost on generator 86, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 104, [0.0, 0.0, 0.1723333, 0.0, 0.3446667, 0.0, 0.517, 0.0] -> [0.0, 0.0, 0.517, 0.0]
[ Info: simplifying pwl cost on generator 91, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 158, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 150, [0.0, 0.0, 0.0373333, 0.0, 0.0746667, 0.0, 0.11199999999999999, 0.0] -> [0.0, 0.0, 0.11199999999999999, 0.0]
[ Info: simplifying pwl cost on generator 122, [0.0, 0.0, 0.222, 0.0, 0.444, 0.0, 0.6659999999999999, 0.0] -> [0.0, 0.0, 0.6659999999999999, 0.0]
[ Info: simplifying pwl cost on generator 75, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 111, [0.0, 0.0, 0.6273333, 0.0, 1.2546667, 0.0, 1.882, 0.0] -> [0.0, 0.0, 1.882, 0.0]
[ Info: simplifying pwl cost on generator 148, [0.0, 0.0, 0.0313333, 0.0, 0.0626667, 0.0, 0.094, 0.0] -> [0.0, 0.0, 0.094, 0.0]
[ Info: pwl x value 0.0033333 is outside the bounds 0.0-0.0 on generator 92
[ Info: pwl x value 0.0066667 is outside the bounds 0.0-0.0 on generator 92
[ Info: pwl x value 0.01 is outside the bounds 0.0-0.0 on generator 92
[ Info: simplifying pwl cost on generator 92, [0.0, 0.0, 0.0033333, 0.0, 0.0066667, 0.0, 0.01, 0.0] -> [0.0, 0.0, 0.01, 0.0]
[ Info: simplifying pwl cost on generator 98, [0.0, 0.0, 0.172, 0.0, 0.344, 0.0, 0.516, 0.0] -> [0.0, 0.0, 0.516, 0.0]
[ Info: pwl x value 0.0033333 is outside the bounds 0.0-0.0 on generator 82
[ Info: pwl x value 0.0066667 is outside the bounds 0.0-0.0 on generator 82
[ Info: pwl x value 0.01 is outside the bounds 0.0-0.0 on generator 82
[ Info: simplifying pwl cost on generator 82, [0.0, 0.0, 0.0033333, 0.0, 0.0066667, 0.0, 0.01, 0.0] -> [0.0, 0.0, 0.01, 0.0]
[ Info: simplifying pwl cost on generator 85, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 118, [0.0, 0.0, 0.08900000000000001, 0.0, 0.17800000000000002, 0.0, 0.267, 0.0] -> [0.0, 0.0, 0.267, 0.0]
[ Info: simplifying pwl cost on generator 119, [0.0, 0.0, 0.0873333, 0.0, 0.1746667, 0.0, 0.262, 0.0] -> [0.0, 0.0, 0.262, 0.0]
[ Info: simplifying pwl cost on generator 125, [0.0, 0.0, 0.2103333, 0.0, 0.4206667, 0.0, 0.631, 0.0] -> [0.0, 0.0, 0.631, 0.0]
[ Info: simplifying pwl cost on generator 130, [0.0, 0.0, 0.2136667, 0.0, 0.4273333, 0.0, 0.6409999999999999, 0.0] -> [0.0, 0.0, 0.6409999999999999, 0.0]
[ Info: simplifying pwl cost on generator 84, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 77, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 95, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 126, [0.0, 0.0, 0.218, 0.0, 0.436, 0.0, 0.654, 0.0] -> [0.0, 0.0, 0.654, 0.0]
[ Info: simplifying pwl cost on generator 108, [0.0, 0.0, 0.172, 0.0, 0.344, 0.0, 0.516, 0.0] -> [0.0, 0.0, 0.516, 0.0]
[ Info: simplifying pwl cost on generator 76, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 103, [0.0, 0.0, 0.311, 0.0, 0.622, 0.0, 0.9329999999999999, 0.0] -> [0.0, 0.0, 0.9329999999999999, 0.0]
[ Info: simplifying pwl cost on generator 156, [0.0, 0.0, 2.8233333, 0.0, 5.6466667, 0.0, 8.47, 0.0] -> [0.0, 0.0, 8.47, 0.0]
[ Info: simplifying pwl cost on generator 93, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 124, [0.0, 0.0, 0.33899999999999997, 0.0, 0.6779999999999999, 0.0, 1.0170000000000001, 0.0] -> [0.0, 0.0, 1.0170000000000001, 0.0]
[ Info: simplifying pwl cost on generator 87, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 127, [0.0, 0.0, 0.2233333, 0.0, 0.4466667, 0.0, 0.67, 0.0] -> [0.0, 0.0, 0.67, 0.0]
[ Info: simplifying pwl cost on generator 116, [0.0, 0.0, 0.0893333, 0.0, 0.17866669999999998, 0.0, 0.268, 0.0] -> [0.0, 0.0, 0.268, 0.0]
[ Info: simplifying pwl cost on generator 100, [0.0, 0.0, 0.317, 0.0, 0.634, 0.0, 0.951, 0.0] -> [0.0, 0.0, 0.951, 0.0]
[ Info: simplifying pwl cost on generator 132, [0.0, 0.0, 0.20800000000000002, 0.0, 0.41600000000000004, 0.0, 0.624, 0.0] -> [0.0, 0.0, 0.624, 0.0]
[ Info: simplifying pwl cost on generator 140, [0.0, 0.0, 0.09, 0.0, 0.18, 0.0, 0.27, 0.0] -> [0.0, 0.0, 0.27, 0.0]
[ Info: simplifying pwl cost on generator 79, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 81, [0.0, 0.0, 0.1666667, 0.0, 0.33333329999999994, 0.0, 0.5, 0.0] -> [0.0, 0.0, 0.5, 0.0]
[ Info: simplifying pwl cost on generator 144, [0.0, 0.0, 0.0313333, 0.0, 0.0626667, 0.0, 0.094, 0.0] -> [0.0, 0.0, 0.094, 0.0]
[ Info: simplifying pwl cost on generator 147, [0.0, 0.0, 0.0323333, 0.0, 0.0646667, 0.0, 0.09699999999999999, 0.0] -> [0.0, 0.0, 0.09699999999999999, 0.0]
┌ Info: Constructing System from Power Models
│   data["name"] = "RTS_GMLC"
└   data["source_type"] = "matpower"
[ Info: Reading bus data
[ Info: Reading Load data in PowerModels dict to populate System ...
[ Info: Reading LoadZones data in PowerModels dict to populate System ...
[ Info: Reading generator data
┌ Warning: EnergyReservoirStorage should be defined as a PowerModels storage... Skipping
└ @ PowerSystems ~/work/PowerSystems.jl/PowerSystems.jl/src/parsers/power_models_data.jl:619
[ Info: Reading branch data
[ Info: Reading shunt data
[ Info: Reading DC Line data
[ Info: Reading storage data
julia> get_units_base(system)"SYSTEM_BASE"

To change the unit system setting of a System:

julia> set_units_base_system!(system, "DEVICE_BASE")[ Info: Unit System changed to UnitSystem.DEVICE_BASE = 1

The units of the parameter values stored in each struct are defined in src/descriptors/power_system_structs.json. Conversion between unit systems does not change the stored parameter values. Instead, unit system conversions are made when accessing parameters using the accessor functions, thus making it imperative to utilize the accessor functions instead of the "dot" accessor methods to ensure the return of the correct values.