BES Reliability Operating Services
The following provides information on the “BES Reliability Operating Services” (BROS) noted in this procedure and the CIP-002 standard.
BROS was introduced in the Guidance and Technical Basis section of the CIP-002 standard, and are based on the NERC Reliability Functional Model. The purpose of the BROS is to assist Responsible Entities (i.e. FPL) in the identification services essential to the reliable operation of the BES asset, and the Cyber Assets associated with those essential services.
For CIP-002 the BROS have been identified as:
BROS Name Brief Description
Dynamic Response Includes those actions performed by BES Elements or subsystems which are automatically triggered to initiate …show more content…
The services are considered essential to the operation of the BES asset, so any Cyber Asset associated with those services would be considered essential, and should be evaluated to see if qualifies as a BCA. Below are two (2) examples on how the BROS can be applied to a Cyber Asset to determine if it is essential to the operation of the BES …show more content…
At a generation BES asset, there are protection relays installed at the step-up transformer (GSU) to protect the actual generation unit from line faults which could impact the operation of the units. ii. The relays are considered Cyber Assets and are part of the generation BES assets protection systems. iii. Reviewing the BROS information for Generator Owner (GO) and / or Generator Operator (GOP), the following is found:
• Under the “Dynamic Response” BROS there is the category of: o “Protection Systems (transmissions & generation)”, which has; o “Lines, busses, transformers, generation” and “Current, frequency, speed, phase” sub-categories iv. The relay Cyber Assets fit into the “Dynamic Response” (Key A) BROS and should be considered essential to the reliable operation of the generation BES asset.
v. The relay Cyber Assets should then be evaluated as a potential BCA.
i. At a generation BES asset there are a set of networking switches installed to interconnect the Distributed Control System (DCS) servers, workstations, and remote devices. ii. The switches are considered Cyber Assets and part of the generation BES assets DCS system. iii. Reviewing the BROS information for Generator Owner (GO) and / or Generator Operator (GOP) the following is