Interchange Scheduling

Question 1

This function is responsibly for communicating arranged interchange for reliability evaluation and for communicating confirmed interchange to be implemented between BA’s

Answer 1

Interchange Coordinator, Interchange Authority, Sink BA, these terms are used interchangeable

Question 2

What are E-tags

Answer 2

the most common method used for exchanging interchange information

Question 3

What is an interchange

Answer 3

is energy in MW’s the crosses BA’s boundaries

Question 4

What is an interchange transaction

Answer 4

an agreement to transfer energy from a seller to a buyer that crosses one or more BA boundaries (source BA to sink BA)

Question 5

What is and interchange Schedule

Answer 5

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

Question 6

Interchange decisions are based on what established reliability criteria

Answer 6

Power transfer limits, voltage support and transmission rights

Question 7

Who is responsible for ensuring arranged interchanged for dynamic schedules are submitted to the interchange authority

Answer 7

Purchasing selling entity (PSE) and Load serving entity (LSE)

Question 8

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?

Answer 8

Sink BA

Question 9

Each ________ BA shall ______ interchange schedules with the ________ BA prior to implementation in the BA’s ACE

Answer 9

Receiving, confirm, Sending

Question 10

Sending and Receiving BA’s must agree upon the Interchange details which include…

Answer 10

Scheduled start and stop times, energy profile which includes MW profile and ramp rate

Question 11

If there is an disagreement or misunderstanding in the interchange details what can occur once the info is inputted in the BA’s ACE

Answer 11

frequency error, time error accumulation and inadvertent interchange

Question 12

If an interchange transaction includes a HVDC operator who informs the HVDC of the interchage

Answer 12

both sending and receiving BA

Question 13

Who is responsible for modifying a tag for and dynamic schedule?

Answer 13

purchasing selling entity

Question 14

more or less then 250mws on a dynamic tag

Answer 14

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.

Question 15

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

Answer 15

the entity that initiated the curtailment

Question 16

Interchange schedules may be implemented bwtn

Answer 16

adjacent BA

Question 17

Define Available Transfer Capability (ATC)

Answer 17

is the amount of transfer capability on the transmission system remaining after already committed uses.
ATC=TTC-CBM-TRM

Question 18

Define Total Transfer Capability (TTC)

Answer 18

The amount of power that can be safely transferred over the transmission system while meeting all pre- and post contingency conditions

Question 19

The intermediate BA receives ______ of energy to replace losses the interchange causes on its system

Answer 19

3%

Question 20

Exceptions for abnormal or emergency conditions with regard to interchange transactions

Answer 20

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

Question 21

Rules for emergency interchange in a reserve sharing group

Answer 21

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

Question 22

If RC directs to modify a active interchange schedule how long does the BA have to change tag

Answer 22

60 mins

Question 23

When a source BA evaluates an arranged interchange it is important to consider

Answer 23

whether there is enough generation to satisfy the magnitude of the interchage and meet is reserve requirement

Question 24

What do BA’s evaluate with arranged interchange

Answer 24

energy profile, generator ramping capability, scheduling path

Question 25

What to transmission service providers review on an arranged interchange

Answer 25

valid transmission service remains within SOL

Question 26

being served on a real time basis is the same as..

Answer 26

dynamic schedule ????? not postive

Question 27

before an interchange is submitted who confirms the ramping requirment

Answer 27

both sink and source BA’s

Question 28

the sink BA evaluating and interchange considers..

Answer 28

whether the sink BA will be able to reduce generation to accommodate the interchange

Question 28

LSE and PSE shall ensure that arranged interchange is submitted to the interchange authority for all dynamic schedules at the expected….

Answer 28

Average MW profile for each hour