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.

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.

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

Id

Q-Axis Current

pu

Iq

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.

More Information

Dynamic Stability