Iro-006-wecc-2

WECC Standard IRO-006-WECC-2 – Qualified Transfer Path Unscheduled Flow (USF) Relief

A. Introduction
1. Title:

Qualified Transfer Path Unscheduled Flow (USF) Relief

2. Number: IRO-006-WECC-2
3. Purpose: Mitigation of transmission overloads due to unscheduled flow on Qualified
Transfer Paths.
4. Applicability
4.1.

Balancing Authority

4.2

Reliability Coordinator

5. Effective Date: On the latter of the first day of the first quarter at least 45 days after
Regulatory approval, or upon complete implementation of applicable webSAS changes and
FERC approval of this standard and the revised Unscheduled Flow Mitigation Plan
Documents.
B. Requirements
R1.

Each Reliability Coordinator shall approve or deny a request within five minutes of
receiving the request for unscheduled flow transmission relief from the Transmission
Operator of a Qualified Transfer Path that will result in the calculation of a Relief
Requirement. [Violation Risk Factor: Medium] [Time Horizon: Real-time Operations]

R2.

Each Balancing Authority shall perform any combination of the following actions meeting
the Relief Requirement upon receiving a request for relief as described in Requirement
R1: [Violation Risk Factor: Medium] [Time Horizon: Real-time Operations]



Approve curtailment requests to the schedules as submitted
Implement alternative actions

C. Measures
M1.

The Reliability Coordinator shall have evidence that it approved or denied the request
within five minutes of receiving a request for relief, in accordance with Requirement R1.
Evidence may include, but is not limited to, documentation of either an active or passive
approval.
M1.1.1 Each Balancing Authority shall have evidence that it provided the Relief

Requirement through Contributing Schedules curtailments, alternative actions, or a
combination that collectively meets the Relief Requirement as directed in
Requirement R.2.
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WECC Standard IRO-006-WECC-2 – Qualified Transfer Path Unscheduled Flow (USF) Relief
D. Compliance
1.

Compliance Monitoring Process:
1.1.

1.2.

Compliance Enforcement Authority


Regional Entity



If the Responsible Entity works for the Regional Entity, then the Regional
Entity will establish an agreement with the ERO or another entity approved by
the ERO and FERC (i.e., another Regional Entity) to be responsible for
compliance enforcement.



If the Responsible Entity is also a Regional Entity, the ERO or a Regional
Entity approved by the ERO and FERC or other applicable governmental
authorities shall serve as the Compliance Enforcement Authority.

Evidence Retention:
The following evidence retention periods identify the period of time an entity is
required to retain specific evidence to demonstrate compliance. For instances
where the evidence retention period specified below is shorter than the time since
the last audit, the Compliance Enforcement Authority may ask an entity to provide
other evidence to show that it was complaint for the full time period since the last
audit.


Each Balancing Authority and Reliability Coordinator shall keep data or
evidence to show compliance as identified below unless directed by its
Compliance Enforcement Authority to retain specific evidence for a longer
period of time as part of an investigation.



The Balancing Authority and Reliability Coordinator shall retain data or
evidence for three calendar years or for the duration of any Compliance
Enforcement Authority investigation; whichever is longer.



If a Balancing Authority or Reliability Coordinator is found non-compliant, it
shall keep information related to the non-compliance until found compliant or
for the duration specified above, whichever is longer.

The Compliance Enforcement Authority shall keep the last audit records and all
requested and submitted subsequent audit records.
1.3.

Compliance Monitoring and Assessment Processes:
 Compliance Audit


Self-Certification



Spot Checking



Compliance Investigation



Self-Reporting



Complaint
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WECC Standard IRO-006-WECC-2 – Qualified Transfer Path Unscheduled Flow (USF) Relief
1.4.

Additional Compliance Information:
Compliance shall be determined by a single event, per path, per calendar month (at
a minimum) provided at least one event occurs in that month.

Version History
Version
Date
1
April 16, 2008

Action
Permanent Replacement Standard for
IRO-STD-006-0

1

February 10, 2009

Adopted by NERC Board of Trustees

1

March 17, 2011

FERC Order 746 issued by FERC
approving IRO-006-WECC-1 (FERC
approval effective on May 24, 2011)

1

May 2, 2012

Updated the requirements to R1. and R2.
instead of R.1. and R1.2.

1

July 1, 2011

Effective Date

2

February 7, 2013

Adopted by NERC Board of Trustees

2

May 13, 2014

FERC letter order issued approving IRO006-WECC-2 (effective July 1, 2014).

Change Tracking

No change

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WECC Standard IRO-006-WECC-2 – Qualified Transfer Path Unscheduled Flow Relief

Time
Horizon

VRF

Violation Severity Levels
Lower VSL

Moderate VSL

High VSL

Severe VSL

R1

Real Time
Operations

Medium Not Applicable

Not Applicable

Not Applicable

There shall be a Severe
level of non-compliance if
there is one instance
during a calendar month
in which the Reliability
Coordinator approved
(actively or passively) or
denied a request for
unscheduled flow
transmission relief from
the Transmission Operator
of a Qualified Transfer
Path, greater than five
minutes after receipt of
notification from the
Transmission Operator of
a Qualified Transfer Path.

R2

Real Time
Operations

Medium There shall be a Lower
Level of noncompliance if there is
less than 100% Relief
Requirement provided
but greater than or
equal to 90% Relief
Requirement provided
or the Relief
Requirement was less

There shall be a
Moderate Level of noncompliance if there is
less than 90% Relief
Requirement provided
but greater than or
equal to 75% Relief
Requirement provided.

There shall be a High
Level of noncompliance if there is
less than 75% Relief
Requirement provided
but greater than or
equal to 60% Relief
Requirement provided.

There shall be a Severe
Level of non-compliance if
there is less than 60%
Relief Requirement
provided.

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WECC Standard IRO-006-WECC-2 – Qualified Transfer Path Unscheduled Flow Relief

Time
Horizon

VRF

Violation Severity Levels
Lower VSL

Moderate VSL

High VSL

Severe VSL

than 5 MW and was
not fully provided.

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