Simulator 16 User Guide - PowerWorld

Area and Zone OPF Reserve Requirement Curves
Simulator OPF Reserves requires the user to specify area or zone reserve constraints as reserve
demand curves for different types of requirements: operating, regulating and contingency.
Simulator OPF Reserves allows reserve constraints to be specified at the area and zone level or both,
including overlapping regions. The data needed to specify reserve constraints at the zone level is
identical to that needed for area reserve constraints.
Reserves Requirement Curves are found on the OPF tab of the Area Information dialog and the OPF
tab of either the edit or run mode Zone Information dialog.
The reserve requirement incremental demand curves are specified by a set of pairs of (MW,$/MWh)
values that form a stair function. The incremental demand curve should be monotonically decreasing,
i.e., while MW values increase, $/MWH values should decrease.
Sometimes, ancillary services markets rules specify a single reserve requirement and its price. For
instance 300MW at $500/MWh. This requirement would be modeled by a demand curve that contains
two points: 0.0 MW at 300 $/MWh, and 300 MW at 0.0 $/MWh.
Enforce Operating Reserve Requirement in OPF - Check this box to make the specified operating
reserve demand curve be enforced by the OPF Reserves tool.
Enforce Regulating Reserve Requirement in OPF - Check this box to make the specified
regulating reserve demand curve be enforced by the OPF Reserves tool.
Enforce Contingency Reserve Requirement in OPF - Check this box to make the specified
contingency reserve demand curve be enforced by the OPF Reserves tool.
Results Page - This page shows total results at the area level for different types of reserve
quantities: regulating reserve up, regulating reserve down, spinning reserve, supplemental reserve,
contingency reserve and operation reserve.
Enforce - Whether a specific type of reserve is enforced for the area. Only regulating,
contingency and operation reserve can be enforce at the area or zone level.
Cleared MW - Total reserve cleared in the area, for each reserve type.
Max Reserve MW - Total available reserve in the area for each reserve type.
Hourly Cost $/hr - Total cost of providing the reserve service in the area for each reserve type.
Price $/MWh - Reserve Marginal Clearing Price (RMCP) for each reserve type. This price is a
result of enforcing the reserve constraints, and thus it is only available for regulation,
contingency and operation reserves.
Hourly Benefit $/Hr - Benefit provided by enforcing reserve constraints at the area level. This
benefit is derived from the enforced reserve demand requirements, and it is only available for
regulation, contingency and operation reserves.
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