NERC Interchange Transaction | questions and answers

NERC Interchange Transaction | questions and answers Generating units jointly owned by two or more Balancing Authorities may be modeled in the AGC systems as a "virtual" tie line flow (pseudo-tie). To properly account for the jointly owned unit as a pseudo-tie, each Balancing Authority must include a portion o fthe unit's MW output as an adjustment to the ________ in its ACE equation. - net actual interchange (NIA) A dynamic schedule is commonly used for scheduling jointly-owned generation between Balancing Authority Areas. To properly account for the jointly-owned unit as a dynamic schedule, each Balancing Authority must include a portion of the unit's MW output as an adjustment to ____ in its ACE equation. - net scheduled interchange (NIA) Balancing Authority A has an interchange schedule to import 600 MW from Balancing Authority B for a period of 1 hour, with a symmetrical 20 minute ramp up at the start of the schedule and a symmetrical 20 minute ramp down at the end of the schedule. If this schedule gets cut after 40 minutes, what is the total billed energy transferred to Area A for this hour? - 400 MWH A Transmission Operator (TOP) determines that an interchange transaction, scheduled to begin at the top of the hour, will result in a potential System Operating Limit (SOL) violation. What should the TOP operator do? - Modify the interchange transaction tag and communicate the modification to the Balancing Authority During real-time operations, there may be a need to modify interchange transactions in progress or about to start, based on actual or potential limit violations or other reliability conditions. In addition to Balancing Authorities, which entities are responsible for implementing such modifications? - Transmission Operators and Reliability Coordinators For a given interchange transaction, which entity is responsible for assessing and approving or denying interchange transactions along a scheduling path based on reliability criteria, transmission rights and Interconnected Operations Services (IOS) adequacy? - Transmission Service Provider For a given interchange transaction, the Transmission Service Provider(s)(TSP) on the scheduling path must verify and assess all of the following EXCEPT: (CANNOT FIND THIS QUESTION ON THE PRINTOUT) - Transaction start and end times. A Balancing Authority Area has connected capacity comprising about 10% of a large synchronous interconnection. Initially, the area is holding a net scheduled interchnage of +100 MW (export). Now suppose 1,000 MW of generation trips external to the area. What is this area's approximate net actual interchange about 20 seconds after the trip? - +200 MW For the scheduling hour , a Purchasing-Selling Entity (PSE) arranges a dynamic schedule between two Balancing Authorities (BAs) and submits the tag to the Sink BA. The Sink BA coordinates approval of the schedule, and the BAs implement the schedule in their AGC/ACE calculations. The PSE must update the tag for the next available scheduling hour if the average energy profile in is ______ MW and the actual hourly integrated energy deviates from the hourly average energy profile indicated on the tag by more than +/-10%. - 500 The default ramp duration for interchange schedules in the Eastern Interconnection is _____ minutes, applied symmetrically across the schedule start and end times. In the Western Interconnection, the default ramp duration is _____ minutes, applied symmetrically across the schedule start and end times. - 10; 20 What is the purpose of NERC's Interchange Transaction Tagging operating reliability standard (INT-001-0)? - To ensure that the details of an interchange transaction are submitted to the appropriate entities in time for reliability assessment and implementation. For a given interchange transaction, which entity is responsible for assessing and approving or denying interchange transactions along a scheduling path based on reliability criteria, transmission rights and Interconnected Operations Services (IOS) adequacy? - Transmission Service Provider For a given interchange transaction, each Balancing Authority (BA) and Transmission Service Provider (TSP) on the scheduling path must communicate its approval or denial for the transaction to the Sink BA. The Sink BA is then required to communicate the composite approval status of the transaction to the following: - a. affected Transmission Owners. b. reliability analysis services. c. Purchasin