See Also
To access the Flows and Voltages Sensitivities dialog go to the Tools ribbon tab, and choose Sensitivities > Flows and Voltages Sensitivities from the Run Mode ribbon group. This is only available in Run Mode.
The grids that occupy all of the tabs on this dialog list each device of the particular type in the system, subject to the Area/Zone/Owner Filter settings. These grids are case information displays, and thus share properties and controls common to all other case information displays.
Multiple Meters, Single Control Change
The Multiple Meters, Single Control Change tab shows the impact on various quantities to a change in a control setpoint in the system.
The Control Types that can be selected:
- Generator Voltage Setpoint - sensitivity of changing the voltage setpoint at a generator in pu. Control unit is pu.
- Transformer Tap Ratio - sensitivity of changing the transformer's tap ratio. Control unit is the tap ratio.
- Phase Shifter Phase Shift - sensitivity of change the phase shifter phase angle. Control unit is degrees expect when calculating angle sensitivities and then it is radians.
- Switched Shunt Nominal Mvar - sensitivity of changing the nominal Mvar injection at a switched shunt. Control unit is Mvar.
- Line Impedance Xinj - sensitivity of changing the per unit series X value on a branch. Control unit is per unit.
Once the Control Type is selected, the specific device must be selected from the object chooser.
Click Calculate Sensitivities to perform the calculations.
The sensitivities that are calculated show up on the various tabs:
Buses
- Sensitivity: dV/dControl (per unit/control unit) --> dV/dControlgives the sensitivity of the bus voltage in per unit to the selected Control Type
- Sensitivity: dAngle/dControl (radians/control unit) --> dAngle/dControl gives the sensitivity of the bus angle in radians to the selected Control Type
- Sensitivity: dQ/dControl (Mvar/control unit) --> dQ/dControl gives the sensitivity of the bus Mvar injection to the selected Control Type
If the Integrated Topology Processing add-on is available, the Only show the primary bus for each superbus checkbox will be available. When checked, the buses that show up in the table will be limited to only those that are primary nodes. The determination of primary nodes is based on the base case topology. This provides an easy filter to eliminate redundant data.
Generators
- Sensitivity: dQ/dControl (Mvar/control unit) --> dQ/dControl gives the sensitivity of the generator Mvar injection to the selected Control Type. When determining this sensitivity, the sensitivity of the total Mvar injection at the generator bus is determined. This total is apportioned to specific generators at a bus based on their proportion of the total Mvar range for the bus. Only generators that are online and on AVR control are included in the calculation.
Branches
- Sensitivity: dP/dControl (MW/control unit) --> dP/dControlgives the sensitivity of the branch MW flow to the selected Control Type
- Sensitivity: dQ/dControl (Mvar/control unit) --> dQ/dControl gives the sensitivity of the branch Mvar flow to the selected Control Type
Interfaces
- Sensitivity: dP/dControl (MW/control unit) --> dP/dControlgives the sensitivity of the interface MW flow to the selected Control Type
- Sensitivity: dQ/dControl (Mvar/control unit) --> dQ/dControl gives the sensitivity of the interface Mvar flow to the selected Control Type