Plotting User Selected Values – Define Plot

When you perform a simulation by double-clicking on the one-line, data is plotted in the AutoPlot tab. Based on the type of simulation, EasyPower selects the values to display in the AutoPlot. For example, if you double-click on an open motor breaker or switch to start a motor, the plot is provided with motor per-unit values for voltage, current, speed and torque. To see values elsewhere in your system, you need to define plots. Nine plots are available with up to a maximum of 5 curves per plot.

Figure 1: Define Plot dialog

To define a plot, on the Stability tab, click Define Plots. In the Define Plot dialog box, select the values to plot by choosing the desired fields for Monitoring, With ID and Next To.

Monitoring: Variable to be plotted. Example: voltage, current, power, torque, and so on.
With ID: ID name of the equipment for which the variable is to be plotted.
Next To: ID name of the bus to which the equipment is connected.

Note: Only activated items are available to plot.

You can also select values by first selecting on an open Monitoring cell, and then right-clicking the desired equipment on the one-line, and selecting the desired value type to be plotted with the Define Plots dialog box open. The entire row is automatically populated.

Figure 2: Define Plot Using One-line Selection

The following values are able to be plotted in a dynamic simulation, if the appropriate equipment is being modeled and is in existence and enabled.

Dynamic Simulation Values
Value	Units	Comment
Bus
Voltage	pu
Voltage	kV
Fault I	pu
Fault I	Amps
Angle	Degrees
Frequency	pu
Frequency	Hz
AF Energy	Cal/cm/cm	If AF Fault Enabled
Network Dev
Current	pu	See Note 1
Current	Amps	See Note 1
kW	kW	See Note 1
kVar	kVar	See Note 1
DS Motor
Term Voltage	pu
Current	pu
Current	Amps
Speed	pu
Speed	RPM
Torque	pu
Load Torque	pu
Watts	pu
Vars	pu
kW	kW
kVar	kVar
Angle	deg	Sync Motor Only
Field Voltage	pu	Sync Motor Only
Power Angle	deg	Sync Motor Only
D-Axis Current	pu	Sync Motor Only
Q-Axis Current	pu	Sync Motor Only
Psi''d	pu	Sync Motor Only
Psi''q	pu	Sync Motor Only
DS Gen
Current	pu
Current	Amps
Speed	pu
Speed	RPM
Torque	pu
P Mechanical	pu
Watts	pu
Vars	pu
kW	kW
kVar	kVar
Field Voltage	pu
Angle	deg	Machine Angle
Term Voltage	pu
Power Angle	deg
D-Axis Current	pu	I_d
Q-Axis Current	pu	I_q
Psi''d	pu	Flux ψ’’_d
Psi''q	pu	Flux ψ’’_q
VPSS	pu	PSS Output Voltage
AVR Out	pu

Network Dev values are those that have no Dynamic Stability Model defined, and include:

Capacitors
Loads
Shunts
Filters
Motors (Non DS Model)*
Generators (Non DS Model)*
Utilities
UPS
Breakers
Switches
Tie Breakers
Tie Switches
Cables
Overhead Lines
Two Winding Transformers
Three Winding Transformers
Busway
Current Limiting Reactors

* For non-DS motors and generators, we mean that no model is defined in the Stability tab of the motor or generator data dialog, or their Enable check box is not selected.

Next: Creating a Simulation Script

More Information

Dynamic Stability

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