Md. Code Regs. 20.50.12.02

Current through Register Vol. 51, No. 22, November 1, 2024

Section 20.50.12.02 - System-Wide Reliability Standards

A. Reliability Data. Each utility shall collect and maintain the data required to:

(1) Provide in its annual performance reports the reliability information specified in this regulation; and

(2) Demonstrate compliance with the reliability standards.

B. Reliability Reporting Period.

(1) Except as otherwise provided in §B(2) of this regulation, the data used by a utility to determine annual reliability performance shall be from the immediately preceding calendar year.

(2) The data used by a utility to determine the poorest performing feeders and multiple device activations shall include outage data from the 12-month period ending September 30 of the immediately preceding calendar year.

C. Reliability Standards - System-Wide Indices.

(1) A utility shall collect and maintain the data necessary to report CAIDI, SAIDI, and SAIFI for its system and each operating district, consisting of all feeders assigned to Maryland under Regulation .03D of this chapter.

(2) For an investor-owned utility, each index shall be calculated and reported in the annual performance report using the following sets of input data:

(a) All interruption data, including and excluding planned outages;

(b) All interruption data minus major outage event interruption data; and

(c) For the calendar year 2020 and each calendar year thereafter, all interruption data minus the Institute of Electrical and Electronics Engineers' (IEEE) major event days.

(3) For cooperatively owned utilities, each index shall be calculated and reported in the annual performance report using the following sets of input data:

(a) All interruption data, including and excluding planned outages;

(b) All interruption data minus major outage event interruption data;

(c) For the calendar year 2020 and each calendar year thereafter, all interruption data minus the Institute of Electrical and Electronics Engineers' (IEEE) major event days;

(d) All interruption data minus major outage event interruption data and minus outage data resulting from an outage event occurring on another utility's electric system; and

(e) For the calendar year 2020 and each calendar year thereafter, all interruption data minus the Institute of Electrical and Electronics Engineers' (IEEE) major event days minus outage data resulting from an outage event occurring on another utility's electric system.

D. SAIDI and SAIFI Standards.

(1) The SAIDI in minutes and SAIFI reliability standards for the calendar years noted and thereafter, unless changed by the Commission, are as follows:

(a) Baltimore Gas and Electric Company.
	2023	2024	2025	2026	2027
SAIDI	103.0	89.0	87.0	86.0	85.0
SAIFI	0.83	0.87	0.84	0.83	0.83
(b) Delmarva Power & Light Company.
	2023	2024	2025	2026	2027
SAIDI	88.0	77.4	77.4	77.4	77.4
SAIFI	1.09	1.03	1.03	1.03	1.03
(c) Potomac Edison Company.
	2023	2024	2025	2026	2027
SAIDI	142.0	142.0	142.0	142.0	142.0
SAIFI	1.06	1.05	1.05	1.05	1.05
(d) Potomac Electric Power Company.
	2023	2024	2025	2026	2027
SAIDI	86.0	72.0	68.4	66.0	66.0
SAIFI	0.89	0.80	0.74	0.70	0.70
(e) Southern Maryland Electric Cooperative, Inc.
	2023	2024	2025	2026	2027
SAIDI	133.2	132.9	132.7	132.6	132.5
SAIFI	1.28	1.27	1.27	1.26	1.26

(2) Each investor-owned utility's annual SAIDI and SAIFI reliability standard shall be measured against its system-wide annual SAIDI and SAIFI result, including all interruption data minus major outage event interruption data and consisting of all feeders assigned to Maryland under Regulation .03D of this chapter.

(3) For the calendar year 2020 and each calendar year thereafter, each investor-owned utility's annual SAIDI and SAIFI reliability standard shall be measured against its system-wide annual SAIDI and SAIFI result, including all interruption data minus the Institute of Electrical and Electronics Engineers' (IEEE) major event days and consisting of all feeders assigned to Maryland under Regulation .03D of this chapter.

(4) Each cooperatively owned utility's annual SAIDI and SAIFI reliability standard shall be measured against its system-wide annual SAIDI and SAIFI result, including all interruption data minus major outage event interruption data and minus outage data resulting from an outage event occurring on another utility's electric system.

(5) For the calendar year 2020 and each calendar year thereafter, each cooperatively owned utility's annual SAIDI and SAIFI reliability standard shall be measured against its system-wide annual SAIDI and SAIFI result, including all interruption data minus the Institute of Electrical and Electronics Engineers' (IEEE) major event days minus outage data resulting from an outage event occurring on another utility's electric system.

(6) A utility's annual SAIDI result shall be equal to or less than its annual SAIDI reliability standard established in §D(1) of this regulation.

(7) A utility's annual SAIFI result shall be equal to or less than its annual SAIFI reliability standard established in §D(1) of this regulation.

(8) SAIDI and SAIFI Standards after 2015.

(a) For the calendar year 2016 and each calendar year thereafter, the Commission shall establish SAIDI and SAIFI reliability standards and any other appropriate reliability requirements for each utility.

(b) By March 1, 2014 and every 4 years thereafter, unless otherwise directed by the Commission, each utility:

(i) Shall file proposed annual SAIDI and SAIFI reliability standards for its Maryland service territory;

(ii) Shall file corresponding cost estimates associated with meeting the proposed SAIDI and SAIFI reliability standards as specified by the Commission; and

(iii) May propose any other appropriate reliability requirement for the Commission's consideration along with supporting comments.

(c) The proposed annual SAIDI and SAIFI reliability standards filed by each utility shall be for a 4-calendar-year period, at a minimum.

E. If a utility fails to satisfy the standard in §D(6) or (7) of this regulation, it shall provide a corrective action plan, preferably in its annual performance report but by no later than April 1.

Md. Code Regs. 20.50.12.02

Amended effective 42:26 Md. R. 1596, eff.1/7/2016; amended effective 46:24 Md. R. 1104, eff. 12/2/2019; amended effective 50:16 Md. R. 728, eff. 8/21/2023