NERC Petition, Exhibit A (Standards)

Exhibit A
VAR-002-WECC-2—Automatic Voltage Regulators
And
VAR-501-WECC-2—Power System Stabilizer

VAR-002-WECC-2—Automatic Voltage Regulators (Clean)

WECC Standard VAR-002-WECC-2 — Automatic Voltage Regulators

A. Introduction
1.

Title:

Automatic Voltage Regulators (AVR)

2.

Number:

VAR-002-WECC-2

3.

Purpose:

To ensure that Automatic Voltage Regulators on synchronous
generators and condensers shall be kept in service and
controlling voltage.

4.

Applicability:
4.1. Functional Entities:

5.

4.1.1

Generator Operators

4.1.2

Transmission Operators that operate synchronous condensers

4.1.3

This VAR-002-WECC-2 Standard applies to synchronous generators and
synchronous condensers that are connected to the Bulk Electric System

Effective Date:
On the first day of the first quarter, after applicable regulatory approval.

B. Requirements and Measures
R1.

Generator Operators and Transmission Operators shall have AVR in service and
in automatic voltage control mode 98% of all operating hours for synchronous
generators or synchronous condensers. Generator Operators and Transmission
Operators may exclude hours for R1.1 through R1.10 to achieve the 98%
requirement. [Violation Risk Factor: Medium] [Time Horizon: Operations
Assessment]
R1.1. The synchronous generator or synchronous condenser operates for less than
five percent of all hours during any calendar quarter.
R1.2. Performing maintenance and testing up to a maximum of seven calendar days
per calendar quarter.
R1.3. AVR exhibits instability due to abnormal system configuration.
R1.4. Due to component failure, the AVR may be out of service up to 60
consecutive days for repair per incident.
R1.5. Due to a component failure, the AVR may be out of service up to one year
provided the Generator Operator or Transmission Operator submits
documentation identifying the need for time to obtain replacement parts and if
required to schedule an outage.
R1.6. Due to a component failure, the AVR may be out of service up to 24 months
provided the Generator Operator or Transmission Operator submits
documentation identifying the need for time for excitation system replacement
(replace the AVR, limiters, and controls but not necessarily the power source
and power bridge) and to schedule an outage.

WECC-0105 P81 Final

Page 1 of 4

WECC Standard VAR-002-WECC-2 — Automatic Voltage Regulators

R1.7. The synchronous generator or synchronous condenser has not achieved
Commercial Operation.
R1.8. The Transmission Operator directs the Generator Operator to operate the
synchronous generator, and the AVR is unavailable for service.
R1.9. The Reliability Coordinator directs Transmission Operator to operate the
synchronous condenser, and the AVR is unavailable for service.
R1.10. If AVR exhibits instability due to operation of a Load Tap Changer (LTC)
transformer in the area, the Transmission Operator may authorize the
Generator Operator to operate the excitation system in modes other than
automatic voltage control until the system configuration changes.
M1.

Generator Operators and Transmission Operators shall provide quarterly reports to
the compliance monitor and have evidence for each synchronous generator and
synchronous condenser of the following:
M1.1 The actual number of hours the synchronous generator or synchronous
condenser was on line.
M1.2 The actual number of hours the AVR was out of service.
M1.3 The AVR in service percentage.
M1.4 If excluding AVR out of service hours as allowed in R1.1 through R1.10,
provide:
M1.4.1

The number of hours excluded,

M1.4.2

The adjusted AVR in-service percentage,

M1.4.3

The date of the outage.

C. Compliance
1.

Compliance Monitoring Process
1.1

Compliance Monitoring Responsibility
Compliance Enforcement Authority

1.2

Compliance Monitoring Period
Compliance Enforcement Authority may use one or more of the following
methods to assess compliance:
- Reports submitted quarterly
- Spot check audits conducted anytime with 30 days notice
- Periodic audit as scheduled by the Compliance Enforcement Authority
- Investigations
- Other methods as provided for in the Compliance Monitoring
Enforcement Program
The Reset Time Frame shall be a calendar quarter.

WECC-0105 P81 Final

Page 2 of 4

WECC Standard VAR-002-WECC-2 — Automatic Voltage Regulators

1.3

Data Retention
The Generator Operators and Transmission Operators shall keep
evidence for Measures M1 for three years plus current year, or since the
last audit, whichever is longer.

1.4

Additional Compliance Information
1.4.1

The sanctions shall be assessed on a calendar quarter basis.

1.4.2

If any of R1.2 through R1.9 continues from one quarter to
another, the number of days accumulated will be the contiguous
calendar days from the beginning of the incident to the end of the
incident. For example, in R1.4 if the 60 day repair period goes
beyond the end of a quarter, the repair period does not reset at
the beginning of the next quarter.

1.4.3

When calculating the in-service percentages, do not include the time
the AVR is out of service due to R1.1 through R1.10.

1.4.4

The standard shall be applied on a machine-by-machine basis (a
Generator Operator or Transmission Operator can be subject to a
separate sanction for each non-compliant synchronous generator
and synchronous condenser).

E. Regional Differences
None
F. Interpretations
None
G. Associated Documents
None

WECC-0105 P81 Final

Page 3 of 4

WECC Standard VAR-002-WECC-2 — Automatic Voltage Regulators

Table of Compliance Elements
R
R1

Time
Horizon
Operational
Assessment

VRF
Medium

WECC-0101 P81 Final

Lower VSL
There shall be a
Lower Level of
non-compliance
if AVR is in
service less than
98% but at least
90% or more of
all hours during
which the
synchronous
generating unit
or synchronous
condenser is on
line for each
calendar quarter.

Violation Severity Levels
Moderate VSL
High VSL
There shall be a
There shall be a
Moderate Level of
High Level of
non-compliance if
non-compliance if
AVR is in service
AVR is in service
less than 90% but at less than 80% but
least 80% or more
at least 70% or
of all hours during
more of all hours
which the
during which the
synchronous
synchronous
generating unit or
generating unit or
synchronous
synchronous
condenser is on line condenser is on
for each calendar
line for each
quarter.
calendar quarter.

Severe VSL
There shall be a
Severe Level of
non-compliance
if AVR is in
service less than
70% of all hours
during which the
synchronous
generating unit or
synchronous
condenser is on
line for each
calendar quarter.

Page 4 of 4

VAR-002-WECC-2-Automatic Voltage Regulators (Redline)

WECC
Standard
VAR-002-WECC-1
— Automatic
Voltage
Regulators
WECC
Standard
VAR-002-WECC-2
— Automatic
Voltage
Regulators
A. Introduction
1.

Title:

Automatic Voltage Regulators (AVR)

2.

Number:

VAR-002-WECC-12

3.

Purpose:

To ensure that Automatic Voltage Regulators on synchronous
generators and condensers shall be kept in service and
controlling voltage.

4.

Applicability:
4.1. Functional Entities:

4.1.1

4.1. Generator Operators

4.2. 4.1.2 Transmission Operators that operate synchronous condensers
4.3. 4.1.3 This VAR-002-WECC-12 Standard only applies to synchronous

generators and
Electric System.
5.

synchronous condensers that are connected to the Bulk

Effective Date:
5.

Effective Date: On the first day of the first quarter, after applicable regulatory

approval.
B. Requirements and Measures

R1.

Generator Operators and Transmission Operators shall have AVR in service
and in automatic voltage control mode 98% of all operating hours for synchronous
generators or synchronous condensers. Generator Operators and Transmission
Operators may exclude hours for R1.1 through R1.10 to achieve the 98%
requirement. [Violation Risk Factor: Medium] [Time Horizon: Operations
Assessment]
R1.1. The synchronous generator or synchronous condenser operates for less than
five percent of all hours during any calendar quarter.
R1.2. Performing maintenance and testing up to a maximum of seven calendar days
per calendar quarter.
R1.3. AVR exhibits instability due to abnormal system configuration.
R1.4. Due to component failure, the AVR may be out of service up to 60 consecutive
days for repair per incident.
R1.5. Due to a component failure, the AVR may be out of service up to one year
provided the Generator Operator or Transmission Operator submits
documentation identifying the need for time to obtain replacement parts and if
required to schedule an outage.
R1.6. Due to a component failure, the AVR may be out of service up to 24 months
provided the Generator Operator or Transmission Operator submits
documentation identifying the need for time for excitation system replacement
(replace the AVR, limiters, and controls but not necessarily the power source
and power bridge) and to schedule an outage.

WECC-0105
Final of Trustees: October 29, 2008
AdoptedP81
by Board

Page
1 of 6
1

WECC
Standard
VAR-002-WECC-1
— Automatic
Voltage
Regulators
WECC
Standard
VAR-002-WECC-2
— Automatic
Voltage
Regulators

R1.7. The synchronous generator or synchronous condenser has not achieved
Commercial Operation.
R1.8. The Transmission Operator directs the Generator Operator to operate the
synchronous generator, and the AVR is unavailable for service.
R1.9. The Reliability Coordinator directs Transmission Operator to operate the
synchronous condenser, and the AVR is unavailable for service.
R1.10. If AVR exhibits instability due to operation of a Load Tap Changer (LTC)
transformer in the area, the Transmission Operator may authorize the Generator
Operator to operate the excitation system in modes other than automatic voltage
control until the system configuration changes.
R2.

Generator Operators and Transmission Operators shall have documentation identifying
the number of hours excluded for each requirement in R1.1 through R1.10. [Violation Risk
Factor: Low] [Time Horizon: Operations Assessment]

C. Measures

M1.

Generator Operators and Transmission Operators shall provide quarterly reports to
the compliance monitor and have evidence for each synchronous generator and
synchronous condenser of the following:
M1.1 The actual number of hours the synchronous generator or synchronous
condenser was on line.
M1.2 The actual number of hours the AVR was out of service.
M1.3 The AVR in service percentage.
M1.4 If excluding AVR out of service hours as allowed in R1.1 through R1.10,
provide:
M1.4.1

The number of hours excluded, and

M1.4.2

The adjusted AVR in-service percentage.,

M2. If excluding hours for R1.1 through R1.10, provide the1.4.3
The date of the outage, the number of hours out of service, and supporting
documentation for each requirement that applies.
D. C. Compliance
1. 1. Compliance Monitoring Process
1.1 1.1 Compliance Monitoring Responsibility

Compliance Enforcement Authority
1.2 1.2 Compliance Monitoring Period

Compliance Enforcement Authority may use one or more of the following
methods to assess compliance:
- Reports submitted quarterly

WECC-0105
Final of Trustees: October 29, 2008
AdoptedP81
by Board

Page
2 of 6
2

WECC
Standard
VAR-002-WECC-1
— Automatic
Voltage
Regulators
WECC
Standard
VAR-002-WECC-2
— Automatic
Voltage
Regulators

- Spot check audits conducted anytime with 30 days notice
- Periodic audit as scheduled by the Compliance Enforcement Authority
- Investigations
- Other methods as provided for in the Compliance Monitoring
Program

Enforcement

The Reset Time Frame shall be a calendar quarter.
1.3 1.3 Data Retention

the

The Generator Operators and Transmission Operators shall keep
evidence for Measures M1 and M2 for three years plus current year, or since
last audit, whichever is longer.

1.4 1.4 Additional Compliance Information
1.4.1 1.4.1 The sanctions shall be assessed on a calendar quarter basis.
1.4.2 1.4.2 If any of R1.2 through R1.9 continues from one quarter to

another, the number of days accumulated will be the contiguous
calendar days from the beginning of the incident to the end of the
incident. For example, in R1.4 if the 60 day repair period goes
beyond the end of a quarter, the repair period does not reset at
the beginning of the next quarter.
1.4.3 1.4.3 When calculating the in-service percentages, do not include the time

the AVR is out of service due to R1.1 through R1.10.
1.4.4 1.4.4 The standard shall be applied on a machine-by-machine basis (a

Generator Operator or Transmission Operator can be subject to a
separate sanction for each non-compliant synchronous generator
and synchronous condenser).
2. Violation Severity Levels for R1
2.1. Lower: There shall be a Lower Level of non-compliance if the following condition exists:
2.1.1.

AVR is in service less than 98% but at least 90% or more of all hours during
which the synchronous generating unit or synchronous condenser is on line for
each calendar quarter.

2.2. Moderate: There shall be a Moderate Level of non-compliance if the following condition
exists:
2.2.1.

AVR is in service less than 90% but at least 80% or more of all hours during
which the synchronous generating unit or synchronous condenser is on line for
each calendar quarter.

2.3. High: There shall be a High Level of non-compliance if the following condition exists:
2.3.1.

AVR is in service less than 80% but at least 70% or more of all hours during
which the synchronous generating unit or synchronous condenser is on line for
each calendar quarter.

WECC-0105
Final of Trustees: October 29, 2008
AdoptedP81
by Board

Page
3 of 6
3

WECC
Standard
VAR-002-WECC-1
— Automatic
Voltage
Regulators
WECC
Standard
VAR-002-WECC-2
— Automatic
Voltage
Regulators
2.4. Severe: There shall be a Severe Level of non-compliance if the following condition
exists:
2.4.1.

AVR is in service less than 70% of all hours during which the synchronous
generating unit or synchronous condenser is on line for each calendar quarter.

3. Violation Severity Levels for R2
3.1. Lower: There shall be a Lower Level of non-compliance if documentation is incomplete
with any requirement R1.1 through R1.10.
3.2. Moderate: There shall be a Moderate Level of non-compliance if the Generator Operator
does not have documentation to demonstrate compliance with any requirement R1.1
through R1.10.
3.3. High: Not Applicable
3.4. Severe: Not Applicable

E. Regional Differences
Version History — Shows Approval History and Summary of Changes in the Action Field
Version

Date

Action

Change Tracking

1

April 16, 2008

Permanent Replacement Standard for
VAR-STD-002a-1

1

April 21, 2011

FERC Order issued approving VAR002-WECC-1 (approval effective June
27, 2011)

* FOR INFORMATIONAL PURPOSES ONLY *
Enforcement Dates: Standard VAR-002-WECC-1 — Automatic Voltage Regulators (AVR) (WECC)
United States
Standard

Requirement

Enforcement Date

VAR-002-WECC-1

All

07/01/2011

Inactive Date

None
F. Interpretations
None
G. Associated Documents
None

WECC-0105
Final of Trustees: October 29, 2008
AdoptedP81
by Board

Page
4 of 6
4

WECC Standard VAR-002-WECC-2 — Automatic Voltage Regulators

Table of Compliance Elements
R
R1

Time
Horizon
Operational
Assessment

VRF
Medium

WECC-0101 P81 Final

Lower VSL
There shall be a
Lower Level of
non-compliance
if AVR is in
service less than
98% but at least
90% or more of
all hours during
which the
synchronous
generating unit
or synchronous
condenser is on
line for each
calendar quarter.

Violation Severity Levels
Moderate VSL
High VSL
There shall be a
There shall be a
Moderate Level of
High Level of
non-compliance if
non-compliance if
AVR is in service
AVR is in service
less than 90% but at less than 80% but
least 80% or more
at least 70% or
of all hours during
more of all hours
which the
during which the
synchronous
synchronous
generating unit or
generating unit or
synchronous
synchronous
condenser is on line condenser is on
for each calendar
line for each
quarter.
calendar quarter.

Severe VSL
There shall be a
Severe Level of
non-compliance
if AVR is in
service less than
70% of all hours
during which the
synchronous
generating unit or
synchronous
condenser is on
line for each
calendar quarter.

Page 5 of 6

VAR-501-WECC-2—Power System Stabilizer (Clean)

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

A. Introduction
1.

Title:

Power System Stabilizer (PSS)

2.

Number:

VAR-501-WECC-2

3.

Purpose:

To ensure that Power System Stabilizers (PSS) on synchronous
generators shall be kept in service.

4.

Applicability:
4.1. Functional Entities:
4.1.1

5.

Generator Operators

Effective Date:

On the first day of the first quarter after applicable regulatory
approval.

B. Requirements and Measures
R1.

Generator Operators shall have PSS in service 98% of all operating hours for
synchronous generators equipped with PSS. Generator Operators may exclude
hours for R1.1 through R1.12 to achieve the 98% requirement. [Violation Risk
Factor: Medium] [Time Horizon: Operations Assessment]
R1.1.

The synchronous generator operates for less than five percent of all
hours during any calendar quarter.

R1.2.

Performing maintenance and testing up to a maximum of seven
calendar days per calendar quarter.

R1.3.

PSS exhibits instability due to abnormal system configuration.

R1.4.

Unit is operating in the synchronous condenser mode (very near zero
real power level).

R1.5.

Unit is generating less power than its design limit for effective PSS
operation.

R1.6.

Unit is passing through a range of output that is a known “rough zone”
(range in which a hydro unit is experiencing excessive vibration).

R1.7.

The generator AVR is not in service.

R1.8.

Due to component failure, the PSS may be out of service up to 60
consecutive days for repair per incident.

R1.9.

Due to a component failure, the PSS may be out of service up to one
year provided the Generator Operator submits documentation
identifying the need for time to obtain replacement parts and if
required to schedule an outage.

WECC-0105 P81 VAR-501-WECC-2 Final

Page 1 of 5

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

M1.

R1.10.

Due to a component failure, the PSS may be out of service up to 24
months provided the Generator Operator submits documentation
identifying the need for time for PSS replacement and to schedule an
outage.

R1.11.

The synchronous generator has not achieved Commercial Operation.

R1.12.

The Transmission Operator directs the Generator Operator to
operate the synchronous generator, and the PSS is unavailable
for service.

Generators Operators shall provide quarterly reports to the compliance monitor and
have evidence for each synchronous generator of the following:
M1.1

The number of hours the synchronous generator was on line.

M1.2

The number of hours the PSS was out of service with generator on line.

M1.3

The PSS in service percentage

M1.4

If excluding PSS out of service hours as allowed in R1.1 through R1.12,
provide:
M1.4.1

The number of hours excluded,

M1.4.2

The adjusted PSS in-service percentage,

M1.4.3

Date of the outage.

C. Compliance
1. Compliance Monitoring Process
1.1

Compliance Monitoring Responsibility

1.2

Compliance Enforcement Authority
Compliance Monitoring Period
Compliance Enforcement Authority may use one or more of the following
methods to assess compliance:
- Reports submitted quarterly
- Spot check audits conducted anytime with 30 days notice
- Periodic audit as scheduled by the Compliance Enforcement Authority
- Investigations
- Other methods as provided for in the Compliance Monitoring

Enforcement Program

WECC-0105 P81 VAR-501-WECC-2 Final

Page 2 of 5

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

The Reset Time Frame shall be a calendar quarter.
1.3

Data Retention
The Generator Operators shall keep evidence for Measures M1 and M2 for
three years plus current year, or since the last audit, whichever is longer.

1.4

Additional Compliance Information
1.4.1

The sanctions shall be assessed on a calendar quarter basis.

1.4.2

If any of R1.2 through R1.12 continues from one quarter to another,
the number of days accumulated will be the contiguous calendar days
from the beginning of the incident to the end of the incident. For
example, in R1.8 if the 60 day repair period goes beyond the end of a
quarter, the repair period does not reset at the beginning of the next
quarter.

1.4.3

When calculating the adjusted in-service percentage, the PSS out of
service hours do not include the time associated with R1.1 through
R1.12.

1.4.4

The standard shall be applied on a generating unit by generating unit
basis (a Generator Operator can be subject to a separate sanction for
each non- compliant synchronous generating unit or to a single
sanction for multiple machines that operate as one unit).

C. Regional Variances
None.
D. Interpretations
None.
E. Associated Documents
None.

WECC-0105 P81 VAR-501-WECC-2 Final

Page 3 of 5

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

Table of Compliance Elements
R
R1

Time
Horizon
Operational
Assessment

VRF
Medium

Violation Severity Levels
Lower VSL
Moderate VSL
High VSL
There shall be a
There shall be a
There shall be a
Lower Level of
Moderate Level of
High Level of
non-compliance non-compliance if
non-compliance if
if PSS is in
PSS is in service
is in service less
service less than less than 90% but at than 80% but at
98% but at least least 80% or more
least 70% or more
90% or more of
of all hours during
of all hours during
all hours during
which the
which the
which the
synchronous
synchronous
synchronous
generating unit is
generating unit is
generating unit is on line for each
on line for each
on line for each
calendar quarter.
calendar quarter.
calendar quarter.

WECC-0105 P81 VAR-502-WECC-2 Final

Severe VSL
There shall
be a Severe
Level of
noncompliance
if PSS is in
service less
than 70%
of all hours
during
which the
synchronous
generating
unit is on
line for each
calendar
quarter.

Page 4 of 5

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

Version History

Version

Date

1

April 16, 2008

Permanent Replacement Standard for
VAR-STD-002b-1

1

April 21, 2011

FERC Order issued approving VAR501-WECC-1 (approval effective June
27, 2011)

2

WECC-0105 P81 VAR-502-WECC-2 Final

Action

NERC Board of Trustees Approval

Change
Tracking

Removed
documentation
requirement from
Requirement R2;
placed the
mandate into the
Measures.
Deleted
Requirement R2.

Page 5 of 5

VAR-501-WECC-2—Power System Stabilizer (Redline)

WECC
Standard
VAR-501-WECC-1–—Power
PowerSystem
SystemStabilizer
Stabilizer
WECC
Standard
– VAR-501-WECC-2

A. Introduction
1.

Title:

Power System Stabilizer (PSS)

2.

Number:

VAR-501-WECC-12

3.

Purpose:

To ensure that Power System Stabilizers (PSS) on synchronous
generators shall be kept in service.

4.

Applicability:
4.1. Functional Entities:

4.1.1
5.

4.1.

Effective Date:

Generator Operators
On the first day of the first quarter, after applicable regulatory
approval.

B. Requirements and Measures

R1.

Generator Operators shall have PSS in service 98% of all operating hours for
synchronous generators equipped with PSS. Generator Operators may exclude
hours for R1.1 through R1.12 to achieve the 98% requirement. [Violation Risk
Factor: Medium] [Time Horizon: Operations Assessment]
R1.1.

The synchronous generator operates for less than five percent of all
hours during any calendar quarter.

R1.2.

Performing maintenance and testing up to a maximum of seven
calendar days per calendar quarter.

R1.3.

PSS exhibits instability due to abnormal system configuration.

R1.4.

Unit is operating in the synchronous condenser mode (very near zero
real power level).

R1.5.

Unit is generating less power than its design limit for effective PSS
operation.

R1.6.

Unit is passing through a range of output that is a known “rough zone”
(range in which a hydro unit is experiencing excessive vibration).

R1.7.

The generator AVR is not in service.

R1.8.

Due to component failure, the PSS may be out of service up to 60
consecutive days for repair per incident.

R1.9.

Due to a component failure, the PSS may be out of service up to one
year provided the Generator Operator submits documentation
identifying the need for time to obtain replacement parts and if

AdoptedP81
by Board
of Trustees:
October 29, 2008
WECC-0105
VAR-501-WECC-2
Final

1
Page
1 of 7

WECC
Standard
VAR-501-WECC-1–—Power
PowerSystem
SystemStabilizer
Stabilizer
WECC
Standard
– VAR-501-WECC-2

R1.10.

R2.

required to schedule an outage.
Due to a component failure, the PSS may be out of service up to 24
months provided the Generator Operator submits documentation
identifying the need for time for PSS replacement and to schedule an
outage.

R1.11.

The synchronous generator has not achieved Commercial Operation.

R1.12.

The Transmission Operator directs the Generator Operator to
operate the synchronous generator, and the PSS is unavailable
for service.

Generator Operators shall have documentation identifying the number of hours
excluded for each requirement in R1.1 through R1.12. [Violation Risk Factor: Low]
[Time Horizon: Operations Assessment]

C. Measures

M1.

Generators Operators shall provide quarterly reports to the compliance monitor and
have evidence for each synchronous generator of the following:
M1.1

The number of hours the synchronous generator was on line.

M1.2

The number of hours the PSS was out of service with generator on line.

M1.3

The PSS in service percentage

M1.4

If excluding PSS out of service hours as allowed in R1.1 through R1.12,
provide:

M1.4.1

The number of hours excluded, and

M1.4.2

The adjusted PSS in-service percentage.,

M2. If excluding hours for R1.1 through R1.12, provide:
M2.1
M2.2

The date

M1.4.3

Date of the outage.

Supporting documentation for each requirement that applies

AdoptedP81
by Board
of Trustees:
October 29, 2008
WECC-0105
VAR-501-WECC-2
Final

2
Page
2 of 7

WECC
Standard
VAR-501-WECC-1–—Power
PowerSystem
SystemStabilizer
Stabilizer
WECC
Standard
– VAR-501-WECC-2

C.

D. Compliance

1. Compliance Monitoring Process
1.1

Compliance Monitoring Responsibility

1.2

Compliance Enforcement Authority
Compliance Monitoring Period
Compliance Enforcement Authority may use one or more of the following
methods to assess compliance:
- Reports submitted quarterly
- Spot check audits conducted anytime with 30 days notice
- Periodic audit as scheduled by the Compliance Enforcement Authority
- Investigations
- Other methods as provided for in the Compliance Monitoring

Enforcement Program
The Reset Time Frame shall be a calendar quarter.
1.3

Data Retention
The Generator Operators shall keep evidence for Measures M1 and M2 for three
years plus current year, or since the last audit, whichever is longer.

1.4

Additional Compliance Information
1.4.1

The sanctions shall be assessed on a calendar quarter basis.

1.4.2

If any of R1.2 through R1.12 continues from one quarter to another, the
number of days accumulated will be the contiguous calendar days from
the beginning of the incident to the end of the incident. For example, in
R1.8 if the 60 day repair period goes beyond the end of a quarter, the
repair period does not reset at the beginning of the next quarter.

When calculating the adjusted in-service percentage, the PSS out of
service hours do not include the time associated with R1.1 through
R1.12.
The standard shall be applied on a generating unit by generating unit basis (a Generator Operator
can be subject to a separate sanction for each non- compliant synchronous generating unit or to a
single sanction for multiple machines that operate as one unit).
1.4.3

2. Violation Severity Levels
2.1. Lower: There shall be a Lower Level of non-compliance if the following condition exists:
2.1.1.

PSS is in service less than 98% but at least 90% or more of all hours during
which the synchronous generating unit is on line for each calendar quarter.

2.2. Moderate: There shall be a Moderate Level of non-compliance if the following
condition exists:
2.2.1.

PSS is in service less than 90% but at least 80% or more of all hours during which

AdoptedP81
by Board
of Trustees:
October 29, 2008
WECC-0105
VAR-501-WECC-2
Final

3
Page
3 of 7

WECC
Standard
VAR-501-WECC-1–—Power
PowerSystem
SystemStabilizer
Stabilizer
WECC
Standard
– VAR-501-WECC-2
the synchronous generating unit is on line for each calendar quarter.
2.3. High: There shall be a High Level of non-compliance if the following condition exists:
2.3.1.

PSS is in service less than 80% but at least 70% or more of all hours during which
the synchronous generating unit is on line for each calendar quarter.

2.4. Severe: There shall be a Severe Level of non-compliance if the following condition
exists:
2.4.1.

PSS is in service less than 70% of all hours during which the synchronous
generating unit is on line for each calendar quarter.

3. Violation Severity Levels for R2
3.1. Lower: There shall be a Lower Level of non-compliance if documentation is incomplete
with any requirement R1.1 through R1.12.
3.2. Moderate: There shall be a Moderate Level of non-compliance if the Generator Operator
does not have documentation to demonstrate compliance with any requirement R1.1
through R1.12.
3.3. High: Not Applicable
3.4. Severe: Not Applicable
C. E. Regional DifferencesVariances

None.
D. Interpretations

None.
E. Associated Documents

None.

AdoptedP81
by Board
of Trustees:
October 29, 2008
WECC-0105
VAR-501-WECC-2
Final

4
Page
4 of 7

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

Table of Compliance Elements
R
R1

Time
Horizon
Operational
Assessment

VRF
Medium

Violation Severity Levels
Lower VSL
Moderate VSL
High VSL
There shall be a
There shall be a
There shall be a
Lower Level of
Moderate Level of
High Level of
non-compliance non-compliance if
non-compliance if
if PSS is in
PSS is in service
is in service less
service less than less than 90% but at than 80% but at
98% but at least least 80% or more
least 70% or more
90% or more of
of all hours during
of all hours during
all hours during
which the
which the
which the
synchronous
synchronous
synchronous
generating unit is on generating unit is
generating unit is line for each
on line for each
on line for each
calendar quarter.
calendar quarter.
calendar quarter.

WECC-0105 P81 VAR-502-WECC-2 Final

Severe VSL
There shall
be a Severe
Level of
non-complia
nce if PSS
is in service
less than
70% of all
hours
during
which the
synchronous
generating
unit is on
line for each
calendar
quarter.

Page 5 of 7

WECC Standard – VAR-501-WECC-2 – Power System Stabilizer

Version History — Shows Approval History and Summary of Changes in the Action Field
Version

Date

1

April 16, 2008

Permanent Replacement Standard for
VAR-STD-002b-1

1

April 21, 2011

FERC Order issued approving VAR501-WECC-1 (approval effective June
27, 2011)

2

Action

NERC Board of Trustees Approval

Change
Tracking

Removed
documentation
requirement from
Requirement R2;
placed the
mandate into the
Measures.
Deleted
Requirement R2.

* FOR INFORMATIONAL PURPOSES ONLY *
Enforcement Dates: Standard VAR-501-WECC-1 — Power System Stabilizer (PSS) (WECC)
United States
Standard

Requirement

Enforcement Date

VAR-501-WECC-1

All

07/01/2011

WECC-0105 P81 VAR-502-WECC-2 Final

Inactive Date

Page 6 of 7