Simulator 16 User Guide - PowerWorld

SCOPF Control
The control dialog allows the user to manually or automatically run a SCOPF simulation and visualize
the execution of the simulation. The SCOPF solution process involves three steps: base case solution
and initialization, contingency analysis, and SCOPF iterations.
Run Full Security Constrained OPF
Press this button to run the three steps of the SCOPF solution automatically. The SCOPF will solve
the base case using the selected method, will use the currently stored list of contingencies during
the contingency analysis step, and will take the CA results and sensitivities to iterate in order to
obtain the optimal solution that minimizes cost and enforces contingency violations.
Maximum Number of Outer Loop Iterations
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Options
Indicates the number of maximum outer loop iterations. The outer loop iterations determines how
many times the contingency analysis will be re-run following a successful SCOPF dispatch. In this
manner, Simulator will look for new violations that may occur due to the new generation dispatch.
Consider Binding Contingent Violations from Last SCOPF Solution
When checked, this option ensures that the contingent violations from the last SCOPF solution are
included in the current SCOPF solution. This option is helpful in preventing the SCOPF from hunting
between having a constraint binding in one solution, and resolving with it not binding in a later
solution because it was previously remedied. This option should generally always be checked, unless
the user is sure that the previous solution has no bearing on the current solution, such as having
made major changes to the system since the previous solution.
Initialize SCOPF with Previously Binding Constraints
When checked, this option results in the SCOPF solution process starts with the exact same LP
tableau from the last solution. This can make for fairly fast solutions (recognizing that the
contingency analysis needs to be resolved) when the changes to the system are small. Simulator
automatically uses this option when doing multiple outer loops of the SCOPF. This option allows the
user to solve the outer loops (set the outer loop counter to 1) by repeatedly solving the SCOPF
manually, potentially making modifications between solutions if desired.
Set Solution as Contingency Analysis Reference Case
Check this field to set the solution of the SCOPF as the contingency analysis reference. If the system
has enough controls to remove all the contingency violations, a rerun of the contingency analysis
using the SCOPF solution as the reference should report no branch violations.
Maximum Number of Contingency Violations Allow Per Element
Specify the maximum number of contingency violations that the SCOPF analysis should allow per
element. After completing the power flow solutions for the base case and the contingencies, only
this number of contingency violations per element are then passed to the linear programming
algorithm. The assumption is that if you fix the 10 worst contingency violations for an element then
the others will also be fixed.
Basecase Solution Method
Specifies whether the solution of the base case is performed using the power flow algorithm or the
optimal power flow algorithm. The selection will affect the initial conditions of the system and
consequently the contingency analysis results and the sensitivities used by the LP solver. Currently
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