(1) Each electric
utility shall maintain sufficient generating capacity, supplemented by
regularly available generating and non-generating resources, in order to meet
all reasonable demands for service and provide a reasonable reserve for
emergencies. Each electric utility shall also coordinate the sharing of energy
reserves with other electric utilities in Peninsular Florida. To achieve an
equitable sharing of energy reserves, Peninsular Florida utilities shall be
required to maintain, at a minimum, a 15% planned reserve margin. The planned
and operating reserve margin standards established herein are intended to
maintain an equitable sharing of energy reserves, not to set a prudent level of
reserves for long-term planning or reliability purposes. The planned reserve
margin for each utility shall be calculated as follows:
RM = [(C - L)/L]*100 where;
"RM" - Is defined as the utility's percent planned reserve
margin;
"C" - Is defined as the aggregate sum of the rated
dependable peak-hour capabilities of the resources that are expected to be
available at the time of the utility's annual peak; and
"L" - Is defined as the expected firm peak load of the
system for which reserves are required.
The following shall be utilized as the operating reserve
standard for Peninsular Florida's utilities: operating reserves shall be
maintained by the combined Peninsular Florida system at a value equal to or
greater than the loss of generation that would result from the most severe
single generating unit contingency. The operating reserves shall be allocated
among the utilities in proportion to each control area's peak hour net energy
for load for the preceding year, and the summer gross Florida Reliability
Coordinating Council (FRCC) capability of its largest unit or ownership share
of a joint unit, whichever is greater. Fifty percent shall be allocated on the
basis of peak hour net energy for load and fifty percent on the basis of the
summer gross FRCC capability of the largest unit. Operating reserves shall be
fully available within fifteen minutes. At least 25% of the operating reserves
shall be in the form of spinning reserves which are automatically responsive to
a frequency deviation from normal.
(2) Treatment of Purchased Power. Only firm
purchase power agreements may be included as a resource for purposes of
calculating a planned or operating reserve margin. A utility may petition for
waiver of this requirement based on the very high availability of specific
non-firm purchases.
(3) Treatment
of Shared Generating Units. Only the utility which has first call on the
generating unit may count the unit towards its planned or operating reserve
margin. A utility has first call on a unit if the unit is available and the
utility has the contractual right to dispatch the unit to meet its native load
and other firm contractual commitments before any other party to the unit's
sharing arrangement. A utility may petition the Commission for approval of
other methods demonstrating equivalent reliability on a case by case
basis.
(4) Treatment of Non-Firm
Load. If non-firm load (i.e., customers receiving service under load
management, interruptible, curtailable, or similar tariffs) is relied upon by a
utility when calculating its planned or operating reserves, the utility shall
be required to make such reserves available to maintain the firm service
requirements of other utilities.
(5) Buy-through Power for Interruptible
Customers. Interruption of service to non-firm customers is not an emergency.
As such, a utility shall not be required to provide buy-through power for
another utility's interruptible customers under obligatory emergency
interchange schedules.
