ev charging table structure#
The EV_Charging table holds information of the charging activities that occur during simulation. Each individual vehicle that charges, either at home or at a charging station, logs information regarding its charging event here.
Field |
Type |
NULL allowed |
Default Value |
Foreign key |
Description |
|---|---|---|---|---|---|
Station_ID |
INTEGER |
YES |
0 |
Identifier for where the vehicle charged. Can refer to a EV_Charging_Station ID or Location ID - former for charging event at an EVCS, and latter for charging event at home |
|
Latitude |
REAL |
YES |
0 |
Latitude of charging event |
|
Longitude |
REAL |
YES |
0 |
Longitude of charging event |
|
vehicle |
INTEGER |
YES |
Vehicle(vehicle) |
Vehicle that was being charged (foreign key to the Vehicle table) |
|
charge_level |
INTEGER |
NO |
0 |
Rate at which the charging occured. Corresponds to the EV_Charging_Station_Plug_Type. |
|
Time_In |
INTEGER |
NO |
0 |
Time when the vehicle arrives at a charging station or home to begin charging. (units: seconds) |
|
Time_Start |
INTEGER |
NO |
0 |
Time when the vehicle actually begins to charge (when electrons start flowing) (units: seconds) |
|
Time_Out |
INTEGER |
NO |
0 |
Time when the vehicle leaves the charging station after completing charging, or stops charging at home. (units: seconds) |
|
Energy_In_Wh |
REAL |
YES |
0 |
Vehicle’s battery level when it arrives to charge (units: Wh) |
|
Energy_Out_Wh |
REAL |
YES |
0 |
Vehicle’s battery level when charging is completed (units: Wh) |
|
Location_Type |
TEXT |
NO |
‘’ |
Text description of whether charging occured at an EV charging station or at home |
|
Has_Residential_Charging |
INTEGER |
NO |
0 |
boolean flag - does the vehicle have access to charging at home |
|
Is_TNC_Vehicle |
INTEGER |
NO |
0 |
boolean flag - is the vehicle a TNC vehicle |
|
Miles_In |
REAL |
YES |
0 |
For TNC vehicles, value denoting what the available range is when vehicle enters charging station (units: miles) |
|
Miles_Out |
REAL |
YES |
0 |
For TNC vehicles, value denoting what the available range is when vehicle exits charging station (units: miles) |
|
Is_Artificial_Move |
INTEGER |
NO |
0 |
boolean flag - did the vehicle arrive at charging station with a negative battery level (meaning it did not have enough battery to even get to the charging station) |
(* - Primary key)
The SQL statement for table and index creation is below.
CREATE TABLE "EV_Charging" (
"Station_ID" INTEGER NULL DEFAULT 0,
"Latitude" REAL NULL DEFAULT 0,
"Longitude" REAL NULL DEFAULT 0,
"vehicle" INTEGER NULL,
"charge_level" INTEGER NOT NULL DEFAULT 0,
"Time_In" INTEGER NOT NULL DEFAULT 0,
"Time_Start" INTEGER NOT NULL DEFAULT 0,
"Time_Out" INTEGER NOT NULL DEFAULT 0,
"Energy_In_Wh" REAL NULL DEFAULT 0,
"Energy_Out_Wh" REAL NULL DEFAULT 0,
"Location_Type" TEXT NOT NULL DEFAULT '',
"Has_Residential_Charging" INTEGER NOT NULL DEFAULT 0,
"Is_TNC_Vehicle" INTEGER NOT NULL DEFAULT 0,
"Miles_In" REAL NULL DEFAULT 0,
"Miles_Out" REAL NULL DEFAULT 0,
"Is_Artificial_Move" INTEGER NOT NULL DEFAULT 0,
CONSTRAINT "vehicle_fk"
FOREIGN KEY ("vehicle")
REFERENCES "Vehicle" ("vehicle_id")
DEFERRABLE INITIALLY DEFERRED)