Current through Register Vol. 63, No. 12, December 1, 2024
(1) Effective beginning January 1, 2012, the
definitions in IEEE 1366, as defined in subsection (2)(b) of this rule, are
adopted unless otherwise expressly modified by this rule. If there is a
conflict between the definitions in IEEE 1366 and this rule, the definitions in
this rule govern.
(2) The
following definitions apply to the Electric Service Reliability Rules, OAR
860-023-0081 through 860-023-0161:
(a)
"Electric company" means a public utility, as defined in ORS
757.005, that supplies
electricity.
(b) "IEEE 1366" means
the Institute of Electrical Electronic Engineers (IEEE) Standard 1366 entitled
"IEEE Guide for Electric Power Distribution Reliability Indices" (the 2012
edition), approved on May 14, 2012 by IEEE-SA Standards Board.
(c) "Loss of Supply - Substation" or "Power
Supply - Substation" means an interruption cause category related to an outage
of a distribution substation component.
(d) "Loss of Supply - Transmission" or "Power
Supply - Transmission" means an interruption cause category related to the
interruption of the electrical supply by the electric company's transmission
system or by another electrical utility or operator.
(e) "Reliability reporting area" means a
grouping of one or more operating areas, for which the electric company
calculates major event thresholds.
(f) "Reporting Period" means the 12-month
period, based on a calendar year, for which the electric company is reporting
reliability performance.
(g)
"System-wide" means pertaining to and limited to the electric company's
customers in Oregon.
(3) For reference only, some IEEE 1366
acronyms or terms commonly used in OAR 860-023-0081 through 860-023-0161 are
repeated herein. (Note - refer to exact definitions and calculation
methodologies in IEEE 1366.)
(a) "CAIDI"
means customer average interruption duration index.
(b) "Customer" means a metered electrical
service point for which an active bill account is established at a specific
location (e.g., premise).
(c)
"Interruption" means the loss of service to one or more customers connected to
the distribution portion of the system. It is the result of one or more
component outages, depending on system configuration.
(d) "MAIFIE" means
momentary average interruption event frequency index. (Note -This index does
not include events immediately preceding a lockout.)
(e) "SAIDI" means system average interruption
duration index.
(f) "SAIFI" means
system average interruption frequency index.
(g) "Major Event" designates an event that
exceeds the reasonable design and or operational limits of the electric power
system. A major event includes at least one Major Event Day (MED).
(h) "Major Event Day" or "MED" means a day in
which the daily system SAIDI exceeds a threshold value,
TMED. For the purposes of calculating daily system
SAIDI, any interruption that spans multiple calendar days is accrued to the day
on which the interruption began. Statistically, days having a daily system
SAIDI greater than TMED are days on which the energy
delivery system experienced stresses beyond that normally expected (such as
severe weather). Activities that occur on major event days should be separately
analyzed and reported.
(i)
"TMED" means a major event day identification threshold
value.
Publications: Publications referenced in this rule are
available for review at the agency.
Stat. Auth.: ORS 183, 756 & 757
Stats. Implemented: ORS
757.020
