Transcript ERCOTs Interconnection Process

ERCOT’s Interconnection
Process
John Adams
Principal Engineer
PV & Storage Workshop
October 15, 2012
Entities involved in the Generation Interconnection Process
in ERCOT
Technical
Consultant
Developer
ERCOT
Financer
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TSP
For the ERCOT its 1-2-3-4
1) Screening Study
2) Full Interconnection Studies
3) Interconnection agreement
4) Review design for protocol compliance
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November 14, 2011
Screening Study
4
November 14, 2011
Full Interconnection Studies
5
November 14, 2011
Interconnection Agreement signed
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November 14, 2011
Review Design for Protocol Compliance
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November 14, 2011
What is currently checked in 16.5 review
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Confirm design will produce ±0.95 Power factor reactive at all MW
levels between LSL and HSL Protocol section 8.1.1.2.1.4.
Power System Stabilizer or equivalent is included in the design:
Protocol section 3.15.3[4]
Unit will provide frequency response: Protocol 8.5.1.1 and 8.5.1.3
Unit will dynamically provide voltage regulation: Protocol section 3.15
Breaker interruption capability is suitable to fault duty
Transient voltage ride through per Protocols and operating guides:
Operating Guide section 2.9
AVR is included in the design, and it can be operated in voltage control
mode. Protocol section (3.15.3 & 3.15 [5])
Unit can respond to changes in the voltage profile. Protocol 3.15
Reactive capability is based upon the ability to deliver to the HIGH side
of the step-up transformer. Protocol section (3.15 [3])
Unit is able to receive control signals from its QSE in an upward and
downward direction. (Normally referred to as AGC; Protocol section
8.1.1.2.1.1 and 8.1.1.4.1(7-8))
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Date
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Meeting Title (optional)
Timeline summary
Interconnection
Request
Submission
Schedule
FIS
scoping
meeting
Screening
Study
Complete
10
90
Initiate Screening
Study
180
5
FIS
Notice
FIS
Complete
60
(~300)
10
180
Study
review
Complete
FIS
Scope
Set
Sync and
Energization
Checklist
IA
Signed
60
7
NPRR 408
Compliance
Check
As per ERCOT Planning Guide Section 5
Time in Days
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Generation Interconnection Process in ERCOT
Perform the Screening study (Steady State):
• Discuss possible Points of Interconnections with the
Developer
• Model the system in PSSE using the latest Steady State
Working Group Case
• TARA Contingency Analysis
• Complete the study in 90 days
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Screening Study Approach
• First Contingency Incremental Transfer Capability
(FCITC) approach, unit under study ramped up from 0120% and constraint and associated violation listed
• Contingency analysis for thermal violations with nearby
Natural Gas units ramped up (Base Case)
• Two standard dispatches executed, summer peak and
low load with wind adjusted up on nearby generators
Load
West Wind
Coast Wind
Nearby
Conventional
Nearby Wind
Sum Peak
Max
SSWG*
SSWG*
100%
95% for Coastal 80%
for West
Low Load
Min
70%
90%
100%
95% for Coastal 80%
for West
• Include all generation with signed Interconnection
Agreements in the vicinity
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Scheduling the Full Interconnection Study
• 180 days to evaluate completed Screening Study
Results
• Notify all the Transmission Service Providers (TSP)
(Transmission Owners Gen Interconnection List) of the
project under study
• Include lead TSP and Developer to discuss the study
results and chalk out the data requirements, timelines,
protocols
• Draft a scope of the Steady State, Dynamic ,Short Circuit
TSP
and Facility studies to be performed
ERCOT
Screening Study
TSP
Full
Interconnection
Study
Steady State
Stability
Short Circuit
Facilities
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Full Interconnection Study (FIS) and timelines
• Approximately 300 days for the TSP to complete the FIS
• ERCOT provides comments and reviews to the
completed studies (10 day review period)
• 180 days allowed for the Resource Entity (Developer) to
sign a Interconnection Agreement after the completion of
the comments period
• 60 days for ERCOT to perform compliance checks once
the IA is signed (NPRR 408)
• Compliance tests to be performed by the unit before
synchronization and energization (7 days)
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