Simulator 16 User Guide - PowerWorld

OPF Options: Common Options
The OPF Dialog, Common Options page displays general options associated with the OPF solution. The
display contains the following fields:
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Objective Function
Allows a choice of solving the LP using either a minimum cost or a minimum control change objective
function.
OPF Reserves Options
These options are only available with the OPF Reserves add-on.
Include OPF Reserve Requirements
Check this box to include OPF reserve constraints in the OPF calculation.
Use a Single Control for Up/Down Regulation
Check this box to use a single bidirectional control for regulating reserve up or down. A unit will
provide the same amount of regulating reserve up or down.
Disable All Phase Shifter Controls
LP Control Variables
Prevents phase shifters from attempting to control devices during the OPF solution.
Disable All Generator MW Controls
Prevents generators from shifting MW output during the OPF solution.
Disable All Load MW Controls
Prevents loads from shifting MW demand during the OPF solution.
Disable Area-toArea MW Transaction Controls
Prevents MW transactions between areas from being dispatched during the OPF solution.
Disable DC Transmission Line MW Controls
Prevents shifting of DC Transmission Line MW transfers during the OPF solution.
Maximum Number of LP Iterations
LP Options
Maximum number of allowable iterations for the LP portion of the LP OPF. How many iterations are
required to obtain a solution depends, among other things, upon the number of breakpoints in the
control cost models. Since each LP iteration can only move from one breakpoint to the next, the
finer the model the more iterations required. However the LP is quite fast so a large number of
iterations can be performed quite quickly. Default = 1000. Select Treat Maximum LP Iterations
Solutions as Valid will treat the maximum number of iteration as a valid solution in the LP OPF.
Phase Shifter Cost ($ / Degree)
Specifies the assumed cost for moving phase shifting transformer taps away from their initial values.
The purpose for this fictitious cost is approximate the cost of actually changing the angle of a phase
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