Interchange Scheduling Flashcards
This function is responsibly for communicating arranged interchange for reliability evaluation and for communicating confirmed interchange to be implemented between BA’s
Interchange Coordinator, Interchange Authority, Sink BA, these terms are used interchangeable
What are E-tags
the most common method used for exchanging interchange information
What is an interchange
is energy in MW’s the crosses BA’s boundaries
What is an interchange transaction
an agreement to transfer energy from a seller to a buyer that crosses one or more BA boundaries (source BA to sink BA)
What is and interchange Schedule
an agreed upon interchange transaction including MW’s start and end time, beginning and ending ramp times and rate, type required for delivery and receipt of power and energy btwn the source and sink BAs involved in the transaction along with the intermediate BA’s along the transfer path
Interchange decisions are based on what established reliability criteria
Power transfer limits, voltage support and transmission rights
Who is responsible for ensuring arranged interchanged for dynamic schedules are submitted to the interchange authority
Purchasing selling entity (PSE) and Load serving entity (LSE)
Who is responsible for ensuring arranged interchange is submitted to the interchange authority when it comes from a joint owned generator or in an emergency interchanged transaction or bilateral inadvertent payback?
Sink BA
Each ________ BA shall ______ interchange schedules with the ________ BA prior to implementation in the BA’s ACE
Receiving, confirm, Sending
Sending and Receiving BA’s must agree upon the Interchange details which include…
Scheduled start and stop times, energy profile which includes MW profile and ramp rate
If there is an disagreement or misunderstanding in the interchange details what can occur once the info is inputted in the BA’s ACE
frequency error, time error accumulation and inadvertent interchange
If an interchange transaction includes a HVDC operator who informs the HVDC of the interchage
both sending and receiving BA
Who is responsible for modifying a tag for and dynamic schedule?
purchasing selling entity
more or less then 250mws on a dynamic tag
if a tag is greater than 250 MW and actual hourly integrated is +/- 10% the PSE must update the tag.
if the tag is equal to or less than 250 mw and the actual hourly integrated is +/- 25MWh the PSE must update the tag.
When a reliability event caused for curtailment on a tag, when the event is over who must release the limit on the tag and communicate the release to the Sink BA
the entity that initiated the curtailment
Interchange schedules may be implemented bwtn
adjacent BA
Define Available Transfer Capability (ATC)
is the amount of transfer capability on the transmission system remaining after already committed uses.
ATC=TTC-CBM-TRM
Define Total Transfer Capability (TTC)
The amount of power that can be safely transferred over the transmission system while meeting all pre- and post contingency conditions
The intermediate BA receives ______ of energy to replace losses the interchange causes on its system
3%
Exceptions for abnormal or emergency conditions with regard to interchange transactions
loss of generation that requires immediate assistance, existing interchange must be modified for reliability reasons or a new interchange is required for reliability. a after the fact schedule will take place
Rules for emergency interchange in a reserve sharing group
if reserves are called upon for more then 60 mins the BA needs to schedule an interchange tranaction, if less then 60 mins they do not need to
If RC directs to modify a active interchange schedule how long does the BA have to change tag
60 mins
When a source BA evaluates an arranged interchange it is important to consider
whether there is enough generation to satisfy the magnitude of the interchage and meet is reserve requirement
What do BA’s evaluate with arranged interchange
energy profile, generator ramping capability, scheduling path
What to transmission service providers review on an arranged interchange
valid transmission service remains within SOL
being served on a real time basis is the same as..
dynamic schedule ????? not postive
before an interchange is submitted who confirms the ramping requirment
both sink and source BA’s
the sink BA evaluating and interchange considers..
whether the sink BA will be able to reduce generation to accommodate the interchange
LSE and PSE shall ensure that arranged interchange is submitted to the interchange authority for all dynamic schedules at the expected….
Average MW profile for each hour
