Digital Fault Recorder Modifications – Lake Substation


Sacramento Municipal Utility District (SMUD)

Project Duration
2020 to Present

Project Contract
Subcontractor to Sargent & Lundy


North American Electric Reliability Corporation (NERC) has revised Reliability Standard PRC-

002-2 (Disturbance Monitoring and Reporting Requirements), which became effective July 1, 2016. The Standard also requires that all necessary work to meet compliance must be completed within six (6) years from the effective date.

SMUD’s System Protection and Control (SPAC) Group performed an assessment of SMUD’s existing infrastructure, specifically the Digital Fault Recorders (DFR), to determine gaps in meeting the requirements of PRC-002-2 and solutions to resolve gaps. The assessment identified modifications and/or replacements to the DFR’s to ensure compliance. In total, SPAC identified DFR’s are eight substations are affected.

Scope of Work:

Reliability Standard PRC-002-2. SMUD will need to arrange analog (current, voltage) channel assignments, circuit breaker status, Trip Indication Relay Status, and Lockout Relay status to the scope of this project is to replace DFR #1 and install a new DFR #2 so that the Transient Recorder (TR) and Sequence of Events (SER) systems at Lake will be compliant with NERC

ensure that the input channels are properly designed, assigned and documented. SMUD will need to update the system drawings to show the transient input channels and sequence of event channels as required in PRC-002-2.