Multi-Region Regional Entity (MRRE) group 15a includes Duke Energy Carolinas, LLC (DEC), Duke Energy Florida, LLC (DEF), Duke Energy Corporation (DECorp), and Duke Energy Progress, LLC (DEP) (collectively referred to as “Duke” or the “Duke Companies”). This violation consists of instances where DEC, DEF, and DECorp were noncompliant with FAC-009-1 R1 (extending to FAC-008-3 R6) for failing to have Facility Ratings that were consistent with their respective Facility Ratings Methodology (FRM). This violation involves instances of noncompliance that were self-reported, identified during a subsequent SERC-led audit, and during the extent of condition.
Identification
SERC was first notified of this violation pursuant to an existing MRRE Agreement. The notification was a Self-Report on August 28, 2018, stating that the entity had discovered three instances where it had Facility Ratings that were not consistent with its Facility Ratings Methodology (FRM). All three instances occurred at a single 500 kV substation and each impacted a separate 500 kV line segment. The three line segments were incorrectly entered into the Facility Ratings Database (FRD) as bundled line conductors rather than single line conductors because at the time of the substation energization, there were no approved Facility Rating Spreadsheets (FRSs) available. In the absence of approved FRSs, personnel defaulted to the bundled line conductor ratings, which drove the conductor ratings higher. However, the conductors were the most Limiting Element and caused Facility Rating derates of 7.8%.
On February 8, 2019, while completing walk-downs in preparation for the SERC-led audit, DEC and DECorp discovered potential instances of noncompliance with FAC-008-3 R6, and submitted one Self-Report which was dismissed and consolidated with the original Self-Report. Additionally, during the SERC-led audit, SERC conducted sample walk-downs for all Duke Companies. While no issues were identified for DEP or DEF, the walk-downs identified that DEC had additional instances where Facility Ratings were not consistent with the respective FRM. The audit finding was dismissed and consolidated with the original Self-Report.
Following the SERC-led audit, SERC requested walk-downs from all Duke Companies to determine the extent of condition. The results of these walk-downs caused SERC to request that DECorp complete a walk-down of all Bulk Electric System (BES) transmission and generation Facilities, with an expected completion date in June 2022. DEC, DEF, and DEP later informed SERC that they would voluntarily complete 100% walk-downs of all their BES Transmission station and substation Facilities.
Walk-down Results
As of November 2021, the results of all walk-downs performed (prior, during, and post-audit) for each Duke Company are as follows:
Cause
The cause of this violation was rooted in the presence of vertical organizational silos, which created challenges to implementing Facility Ratings programs that were consistent and equally effective across the Duke Companies. The silos resulted primarily from the 2006 merger of Duke Energy and Cinergy in the Midwest footprint, now DECorp. Specifically, when the merger occurred, DECorp left a good portion of Cinergy’s Facility Ratings program in place, including an FRM that included the above-mentioned design practice. The combined FRM was different from the FRMs utilized by DEC, DEF, and DEP. In 2013, DECorp and DEC merged their FRMs and that design practice was removed from the newly combined FRM. However, DEF and DEP still had their own programs and FRMs. Around the same time, DECorp had already begun its efforts to correct the Facilities that were missing bus work and CTs. Those efforts were suspended prior to completion. Thus, although DECorp and DEC were using the same FRM, the two entities continued working in silos over the years. As a result of the silos, the Duke Companies had been working independently from one another, which resulted in a lack of uniformity and coordination over the years. This further contributed to a lack of awareness of the Facility Ratings program challenges that existed within the Duke Companies, including lack of or inadequate change management controls for equipment changes/replacements; inadequate controls in the asset commissioning process; and lack of documented procedures and controls to ensure that Equipment Ratings information and calculations used matched the corresponding ratings documentation.
Period of Violation
This violation began on June 18, 2007, when the Standard became enforceable and DECorp first failed to have Facility Ratings that were consistent with the FRM, and will end on June 27, 2022 once all walk-downs have been completed by Duke and all identified issues have been addressed.
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