See Also
This page is found on the DC Transmission Line Options dialog. This page contains the following DC line parameters:
Status
Operating status of the DC transmission line. If the status is Open, then no power can flow on the DC line regardless of the control mode setting. If the status is Closed, then the control mode will dictate how power flows on the line.
Control Mode
The initial control mode for the line. Specify Blocked to disable the DC line, Power to maintain specified MW power flow through the line, or Current to maintain specified current flow through the line.
Setpoint
If the line operates in the Power Control Mode, Setpoint should indicate the desired power flow in MW. To specify power flow at the rectifier end, enter a positive value. Enter a negative value to specify power flow at the inverter end. If the DC line operates in Current Control Mode, enter the desired line flow in amps.
Setpoint Margin
Value between 0 and 1. When the DC voltage schedule cannot be achieved, the power or current order will not be reduced by more than this amount multiplied by the setpoint. Beyond this point, the voltage schedule will be reduced instead.
Resistance
Resistance of the DC Line.
Sched. Voltage
Scheduled DC line voltage in kV. The value of Rcomp is used to determine whether this value specifies the inverter end, the rectifier end, or some point in the middle.
Switch Voltage
When the line operates in the Power Control Mode, this is the inverter voltage level in kV at which the line switches from constant power to constant current control.
RComp
Compounding resistance. The compounding resistance dictates the point along the line where the voltage is controlled. RComp = 0 means the voltage is controlled at the inverter, and RComp = DC Line Resistance means the voltage is controlled at the rectifier. A value equal to one half the resistance of the line means that the voltage is controlled half way along the DC line.
Setpoint Specified At
Indicates which end of the DC transmission line the Setpoint value is designated. This will be the terminal where the setpoint value is maintained. The opposite terminal flow value will be a calculated quantity.
Metered End of Line
Indicates which end of the DC line is assumed metered for Area interchange calculations.
Flow
These parameters provide the calculated MW Flow, Mvar Flow, and DC Voltage (kV) at both the rectifier and inverter. DC Line Current (Amps) is also provided.