See Also
Switched Shunt SVC Control Mode simulates a continuous or discrete shunt element that can control up to 8 fixed shunts. These shunts do not have to have a Control Mode that is fixed, but they are treated as fixed as long as they are being controlled by an SVC. To operate in this mode, the SVC Control Mode has to be selected in the Parameter tab of the Shunt Information dialog in either Edit mode or Run mode.
The following conditions need to be corrected in order for the Transient Stability Simulation to run without the following error (The Transient Model SVSMO1,2 or 3 do not matche the power flow control model):
SVC Control Considerations when running Transient Stability
In PowerWorld we do not allow to run a transient simulation that have a switched shunt transient models svsmo1, svsmo2 and svsmo3 if the power flow model is not matching the corresponding SVC model. The reason for this is that it will cause initialization problems because the initial power flow solution will not match the transient model and this will make the output of the shunt to move as soon as the transient simulation starts.
Below are the control options that MUST be corrected in order for the error to disappear and to be able to at least run the transient stability simulation:
Correct the Shunt Control Model and SVC Type:
Set the Switched Shunt Control Mode to SVC:
Set the SVC to the corresponding Type in the SVC Control Options Tab that matches the transient stability model of the switched shunt (SVSMO1, SVSMO2 and SVSMO3):
Below are the control options that are RECOMMENDED in order to have a better transient stability solution that matches the power flow initial conditions:
The Continuous Nom Mvar needs to match the Bmax and Bmin of the SVSMO1 or SVSMO3 transient model. The reason for this is only noticeable if that SVC is on a limit during the power flow. If the limits from the power flow do not match the limits of the transient model then the SVC will probably start to move as soon as the transient simulation is started in particular if the transient model limits are higher or lower than the power flow limits:
The Min and Max in the transient mode can be found in the transient model as Bmax and Bmin for SVSMO1 or Imax1 for SVSMO3:
Please NOTE that the Bmax, Bmin and Imax1 are in pu in the transient model and in the power flow control options the limits are in Nom Mvar for SVSMO1 and SVSMO2, and in Nom Amps for SVSMO3. The SVSMO2 Min and Max values are determined by the switched blocks.