Substation assignments to WeatherStation
The ability add weather-dependent limits was added in Version 23
Substation objects have various field associated with them which are used as part of the Weather-Dependent Limits which are accessed on the Weather-Dependent Limits dialog.
There also similar weather-related fields for Generator and Branch objects.
Substation Weather-Related Fields
Each Substation can be assigned to a WeatherStation object directly by entering the Name of a WeatherStation object in the substation field with the name WeatherStation. This designation will then be used when Branch and Generator objects are not assigned to their own WeatherStation. The default behavior will be that the link between weather and the power system occurs at the substation object in the data structure. The substation object then has a large number of fields that perform lookups into the assigned WeatherStation object to show the associated weather information for the substation. These are described in the following table.
|
Field |
Type |
Type |
|
WeatherStation |
String |
WeatherStation object to which the user has assigned the substation |
|
WeatherStationClosestName |
String |
This field is calculated by doing a Delaunay Triangulation of the WeatherStations objects with latitude/longitude coordinates in the case. This then shows the name of the closest WeatherStation based on this calculation. A user could choose to copy this designation into the user-assigned WeatherStation field. |
|
WeatherStationDistanceMILE |
Single Float |
Distance in miles from substation to the WeatherStationClosestName |
|
WeatherStationDistanceKM |
Single Float |
Distance in km from substation to the WeatherStationClosestName |
|
AtmosphericTransmittance |
Single Float |
Gives an estimate of the atmospheric transmittance with 1.000 for the sun directly overhead, decreasing as it approaches the horizon; 0.000 if below the horizon. This is calculated from the latitude, longitude, date, and time of day. |
|
SolarAzimuth |
Single Float |
Gives the sun's azimuth using the compass, with 0 due north, 90 degrees due east, 180 due south and 270 due west. This is calculated from the latitude, longitude, date, and time of day. |
|
SolarElevation |
Single Float |
Gives the sun's elevation about the horizon, with 90 degrees straight overhead. This is calculated from the latitude, longitude, date, and time of day. |
|
WS_TempF WS_TempC WS_DewPointF WS_DewPointC WS_CloudCoverPerc WS_WindSpeedmph WS_WindSpeedKnots WS_WindSpeedMsec WS_WindSpeedkmph WS_WindDirection WS_InsolationPerc |
Single Float |
See the fields available for the WeatherStation object for more information.
Special feature ONLY for Substation objects: The various numeric fields with the substation such as WM_TempF, WM_CloudCoverPerc etc. can be edited in the substation case information displays. When editing these values the WeatherStation specified in the WeatherStation field will have the respective weather value changed. If the substation is not presently assigned to a WeatherStation, then the WM_* value will be blank, but a value can still be assigned to the substation. When editing the numeric value that is blank, Simulator will automatically create a new WeatherStation with a name equal to the name of the substation, and the value of the WeatherStation will be set to the entered value. |
|
WS_Humidity WS_WindChillF WS_WindChillC WS_HeatIndexF WS_HeatIndexC |
Single Float |
See the fields available for the WeatherStation object for more information. |
|
WS_Enabled WS_ObservationTime |
String |
See the fields available for the WeatherStation object for more information. |