Transcript Asynchronous Generators

16 DECEMBER 2015
Reactive Capability-Related
Changes
Kory Haag
OPERATIONS ANALYST ISO-NEW ENGLAND
ISO-NE PUBLIC
Problem Statement
• Existing rules require certain resources to perform reactive
capability tests for:
– Reliability under Market Rule 1, and/or
– Compensation purposes under Schedule 2 of the ISO OATT
• Current reactive capability auditing rules do not provide guidance
for all necessary resource or system conditions that need to be met
during the audit.
• Asynchronous and non-generator resources have been installed
that affect system limits. Reactive capability auditing rules need to
be established for these types of resources.
• Asynchronous and non-generator resource participants have
requested that the ISO update the rules to enable participation in
the Schedule 2 Capacity Cost Compensation Program (CCCP) by
these new technology types.
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Purpose of Today’s Presentation
• The ISO provided an overview of the need for the changes
and the proposed changes under consideration at the
Transmission Committee and Reliability Committee in October
2015 and November 2015 (respectively).
• The proposed reactive capability-related changes will be
reflected in the following ISO New England Governing
Documents:
– Schedule 2 of the ISO OATT (Schedule 2) (Transmission Committee)
– Schedule 2 Business Procedure (Schedule 2 BP) (Transmission
Committee)
– Operating Procedures No. 23 (OP-23) (Reliability Committee)
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Overview of Operating Procedure Changes
• Remove rules regarding how a Reactive Capability Audit is
performed from Schedule 2 BP and move into OP-23 in order
to have a more comprehensive auditing Operating Procedure
and to remove the need for resources that are not receiving
compensation to audit under compensation rules
• Revise Schedule 2 BP and OP-23 to update reactive capability
auditing requirements for conventional generators that are
currently subject to testing requirements
• Revise OP-23 to add reactive capability auditing requirements
for asynchronous generators and non-generators
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General Changes
•
Move reactive capability auditing requirements from Schedule 2 BP into OP-23
•
Change language from “Testing” to “Auditing”
•
Update Automatic Voltage Regulator equipment (AVR) language to include all
equipment that may affect reactive output (DCS, Wind Plant Controller, etc.)
•
Require AVR equipment to be in service during audit, unless prevented by
physical plant limitations
•
Expanding testing window to full calendar year. Currently the reactive
capability testing periods are:
– March 1-October 31 for Leading
– June 1-September 15 Lagging
•
Revise waiver provisions to require at least one actual attempted test that was
limited by system conditions prior to waiver consideration
– Current waiver provisions only require that two tests be requested, not that physical
testing occurs
•
Revise provisions to require that voltage be within certain tolerance for test to
be valid (next slides)
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Reactive Capability Audit Voltage System Conditions
LAGGING TEST
kV Maximum
Tolerance Band
High
Ideal Voltage During the Audit
Acceptable System Condition
Voltage
Schedule
Ideal Voltage Prior to Audit Start
Tolerance Band
Low
Unacceptable System Condition
kV Minimum
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Reactive Capability Audit Voltage System Conditions
LEADING TEST
kV Maximum
Unacceptable System Condition
Tolerance Band
High
Ideal Voltage Prior to Audit Start
Voltage
Schedule
Ideal Voltage During the Audit
Acceptable System Condition
Tolerance Band
Low
kV Minimum
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Conventional Generator Audit Changes
• Allowing for temperature adjustment for resources that can’t
meet +/-5% of SCC during testing because of temperature
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Asynchronous Generators
• Test with at least 90% of inverters online
• Test at maximum real power capability at the time of test
(limited by wind or sun, not by transmission, DNE, etc.)
• Test at zero real power output (if capable)
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Non-Generators
• Add synchronous condensers and FACTs devices
• Requirement to test or provide test data for overload
capabilities, if capable
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Review of Draft Procedure Changes
• OP 23 Draft language review
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Timeline
• RC/TC vote in January 2016
• Changes effective Q2 of 2016
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