Ohio Administrative Code › Title 4901:1 - Utilities › Chapter 4901:1-10 - Electric Companies › Section 4901:1-10-10 - Distribution system reliability

Current through all regulations
			 passed and filed through July 1, 2024
(A) General. This rule prescribes the
			 measurement of each electric utility's service reliability, the development of
			 minimum performance standards for such reliability, and the reporting of
			 performance against the established standards.
(B) Service reliability indices and minimum
			 performance standards.
(1) The service
			 reliability indices are as follows:
"CAIDI," or the customer average interruption duration index,
				represents the average interruption duration or average time to restore service
				per interrupted customer. CAIDI is expressed by the following formula:
CAIDI equals sum of customer interruption durations divided by
				total number of customer interruptions
"SAIFI," or the system average interruption frequency index,
				represents the average number of interruptions per customer. SAIFI is expressed
				by the following formula:
SAIFI equals total number of customer interruptions divided by
				total number of customers served
(2) Each electric utility in this state shall
			 file with the commission an application to establish company-specific minimum
			 reliability performance standards.
(3) Applications for approval of a
			 reliability performance standard shall include:
(a) A proposed methodology for establishing
			 reliability standards.
(b) A
			 proposed company-specific reliability performance standard for each service
			 reliability index based on the proposed methodology.
(c) Supporting justification for the proposed
			 methodology and each resulting performance standard.
(4) Supporting justification for the proposed
			 methodology and each resulting performance standard.
(a) Performance standards should reflect
			 historical system performance, system design, technological advancements,
			 service area geography, customer perception survey results as defined in
			 paragraph (B)(4)(b) of this rule, and other relevant factors.
(b) Each electric utility shall periodically
			 (no less than every three years) conduct a customer perception survey. The
			 survey results shall also be used as an input to the methodology for
			 calculating new performance standards. The survey shall be paid for by the
			 electric utility and shall be conducted under staff oversight. The objective of
			 the survey is to measure customer perceptions, including, but not limited to
			 expectations of electric service reliability in terms of the service
			 reliability indices defined in paragraph (B)(1) of this rule.
(c) Performance data during major events and
			 transmission outages shall be excluded from the calculation of the indices,
			 proposed standards, and any revised performance standards, as set forth in
			 paragraph (B) of this rule.
(5) Unless otherwise
			 ordered by the commission, legal director, deputy legal director, or attorney
			 examiner, the following procedural schedule shall apply:
(a) Upon the filing of an application, the
			 commission, legal director, deputy legal director, or an attorney examiner will
			 schedule a technical conference. The purpose of the technical conference is to
			 allow interested persons an opportunity to better understand the electric
			 utility's application. The electric utility will have the necessary personnel
			 in attendance at this conference so as to explain, among other things, the
			 filing, the work papers and the manner in which methodologies and resulting
			 performance standards were devised. The conference will be held at the
			 commission offices.
(b) Within
			 twenty calendar days after the technical conference, any person may file
			 comments.
(c) Within thirty
			 calendar days after the technical conference, the commission's staff may file
			 comments.
(d) Within fifty calendar
			 days after the technical conference, any person may file a response to the
			 comments.
(e)
										If the commission schedules a hearing,
										interested
			 persons wishing to participate in the hearing may file a
			 motion to intervene no later than thirty calendar days after the issuance of
			 the entry scheduling the hearing, unless ordered otherwise by the commission,
			 legal director, deputy legal director, or attorney examiner. This rule does not
			 prohibit the filing of a motion to intervene and conducting discovery prior to
			 the issuance of an entry scheduling a hearing.
(6) An
			 electric utility may request to revise its authorized performance standards by
			 filing its revisions and supporting justification for such revisions with the
			 commission for approval pursuant to paragraph (B)(6) of this rule, unless
			 otherwise ordered by the commission, legal director, deputy legal director, or
			 attorney examiner.
(7) The authorized
			 performance standards approved for an electric utility shall remain in place
			 until superseded by revised standards as approved by the commission.